CROP SOLUTIONS
Your crop.
Your seasonal feeding program.
Choose your crop to explore NABTA product quantities and application timing through the annual growing cycle. Programs cover California nut orchards, fruit orchards and grape vineyards.
Example schedules for planning. These research-informed calculations use stated assumptions. They are not field-validated NABTA recommendations and do not guarantee yield. Your crop adviser should adjust them for measured soil, tissue and irrigation-water nutrients, crop load, salinity and irrigation capacity before field use.
Use current product labels. Mature-acre rates do not apply to newly planted trees or vines. Missing rates are marked “Rate pending.”
01 · NUT TREE GROWERS
Choose your nut crop.
AlmondsView growth stages, NABTA rates & application timing
Illustrative feeding program · agronomic review required
Example block: 2,500.0 lb kernels/ac; age 16–25 years. Mature commercial planting with zero assumed soil, water or other nutrient credits.
Seasonal fertilizer nitrogen237.5 lb K2O/ac
Seasonal potassium budget306.5 lb Ca/ac
Calcium supplied by CALTRATE
How to read this schedule: bold amounts are total product pounds per acre for the entire stage. Divide them across the separate applications shown. Dates are approximate; use actual crop stage. All rates shown are for root-zone fertigation, not foliar spraying.
| Growth stage / timing | NABTA CALTRATE 15.5-0-0 + Ca19 | NABTA SOP 0-0-52 |
|---|---|---|
| Dormancy / bloomBefore leaf-out | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
| Leaf expansionEnd bloom to full leaf | 322.6 lb/acStage total: 11 separate application × 29.3 lb/ac each | 91.3 lb/acStage total: 5 separate applications × 18.3 lb/ac each |
| Fruit growthLeaf expansion to hardening | 483.9 lb/acStage total: 17 separate applications × 28.5 lb/ac each | 137.0 lb/acStage total: 7 separate applications × 19.6 lb/ac each |
| Kernel fillHardening to early hull split | 483.9 lb/acStage total: 17 separate applications × 28.5 lb/ac each | 228.4 lb/acStage total: 12 separate applications × 19.0 lb/ac each |
| Late-season reserveHull split to early postharvest | 322.6 lb/acStage total: 11 separate application × 29.3 lb/ac each | No routine application0 lb/ac in this example |
| Leaf fallNo active uptake | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
Assumptions & adjustments
- N demand = kernel yield × 0.068 + 30 lb/ac growth for the stated age; 80% recovery is an example assumption.
- N split 20/30/30/20 follows UC/CDFA. Reassess the final 20% using crop load, tissue N and active canopy.
- K example = 95 lb K2O/1,000 lb kernels, midpoint of reported 90–100 removal; K timing is proposed.
- No routine phosphorus or micronutrient dose is included. These examples assume adequate phosphorus; other nutrients require diagnostic evidence.
- Application counts are arithmetic subdivisions using 30 lb CALTRATE/ac and 20 lb SOP/ac as maximum example event sizes. Confirm current label directions, irrigation frequency, injection capacity, EC and calcium loading. Do not add irrigation solely to fit the schedule.
Product compatibility: apply CALTRATE separately from SOP, MKP, LIB and other phosphate or sulfate solutions, with appropriate flushing. Confirm the current California registration and label for SOP before purchase or use; its current status has not been verified for this example.
Research basis: UC / CDFA crop nutrition reference. Product analyses: CALTRATE label reference · SOP label reference. These references do not imply UC endorsement of NABTA products.
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WalnutsView growth stages, NABTA rates & application timing
Illustrative feeding program · agronomic review required
Example block: 2.5 tons in-shell nuts/ac; hulls removed. Mature commercial planting with zero assumed soil, water or other nutrient credits.
Seasonal fertilizer nitrogen150.0 lb K2O/ac
Seasonal potassium budget236.4 lb Ca/ac
Calcium supplied by CALTRATE
How to read this schedule: bold amounts are total product pounds per acre for the entire stage. Divide them across the separate applications shown. Dates are approximate; use actual crop stage. All rates shown are for root-zone fertigation, not foliar spraying.
| Growth stage / timing | NABTA CALTRATE 15.5-0-0 + Ca19 | NABTA SOP 0-0-52 |
|---|---|---|
| Dormancy / budbreakBefore active shoot growth | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
| Shoot growthApr | 373.3 lb/acStage total: 13 separate applications × 28.7 lb/ac each | 72.1 lb/acStage total: 4 separate applications × 18.0 lb/ac each |
| Fruit growthMay | 373.3 lb/acStage total: 13 separate applications × 28.7 lb/ac each | 72.1 lb/acStage total: 4 separate applications × 18.0 lb/ac each |
| Nut fillJun to early Jul | 497.7 lb/acStage total: 17 separate applications × 29.3 lb/ac each | 144.2 lb/acStage total: 8 separate applications × 18.0 lb/ac each |
| Late nut fill / harvestLate Jul–Oct | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
| Postharvest / leaf fallAutumn | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
Assumptions & adjustments
- N example includes 48 lb/ton for crop plus leaf/pruning allowance, then 15 lb/ac woody growth; 70% recovery assumed.
- K = 15 lb/ton nuts + 45 lb/ton hulls removed. Reduce the hull component where hull nutrients actually return.
- 60% spring / 40% early summer N fits UC timing. K is a proposed in-season drip split, not deficiency correction.
- No routine phosphorus or micronutrient dose is included. These examples assume adequate phosphorus; other nutrients require diagnostic evidence.
- Application counts are arithmetic subdivisions using 30 lb CALTRATE/ac and 20 lb SOP/ac as maximum example event sizes. Confirm current label directions, irrigation frequency, injection capacity, EC and calcium loading. Do not add irrigation solely to fit the schedule.
Product compatibility: apply CALTRATE separately from SOP, MKP, LIB and other phosphate or sulfate solutions, with appropriate flushing. Confirm the current California registration and label for SOP before purchase or use; its current status has not been verified for this example.
Research basis: UC / CDFA crop nutrition reference. Product analyses: CALTRATE label reference · SOP label reference. These references do not imply UC endorsement of NABTA products.
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Pistachios · on yearView growth stages, NABTA rates & application timing
Illustrative feeding program · agronomic review required
Example block: 4,000.0 lb marketable CPC nuts/ac; 120 trees/ac. Mature commercial planting with zero assumed soil, water or other nutrient credits.
Seasonal fertilizer nitrogen142.0 lb K2O/ac
Seasonal potassium budget232.9 lb Ca/ac
Calcium supplied by CALTRATE
How to read this schedule: bold amounts are total product pounds per acre for the entire stage. Divide them across the separate applications shown. Dates are approximate; use actual crop stage. All rates shown are for root-zone fertigation, not foliar spraying.
| Growth stage / timing | NABTA CALTRATE 15.5-0-0 + Ca19 | NABTA SOP 0-0-52 |
|---|---|---|
| DormancyBefore leaf-out | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
| Leaf-outLate Mar–Apr | 245.2 lb/acStage total: 9 separate applications × 27.2 lb/ac each | No routine application0 lb/ac in this example |
| Fruit growthMay | 367.7 lb/acStage total: 13 separate applications × 28.3 lb/ac each | 109.2 lb/acStage total: 6 separate applications × 18.2 lb/ac each |
| Early kernel fillJun | 183.9 lb/acStage total: 7 separate applications × 26.3 lb/ac each | 109.2 lb/acStage total: 6 separate applications × 18.2 lb/ac each |
| Kernel fillJul | 183.9 lb/acStage total: 7 separate applications × 26.3 lb/ac each | 54.6 lb/acStage total: 3 separate applications × 18.2 lb/ac each |
| Fruit maturityAug to early hull split | 245.2 lb/acStage total: 9 separate applications × 27.2 lb/ac each | No routine application0 lb/ac in this example |
| Postharvest / leaf fallNo routine N in this example | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
Assumptions & adjustments
- N = yield × 0.028 + 21 lb/ac growth, divided by assumed 70% recovery after credits.
- K = yield × 0.029 + 26 lb/ac growth. N 20/30/30/20 and K 40/40/20 use UC/CDFA timing guidance.
- The kernel-fill N allocation is divided between June and July here. Rebudget after May tissue and crop assessment.
- No routine phosphorus or micronutrient dose is included. These examples assume adequate phosphorus; other nutrients require diagnostic evidence.
- Application counts are arithmetic subdivisions using 30 lb CALTRATE/ac and 20 lb SOP/ac as maximum example event sizes. Confirm current label directions, irrigation frequency, injection capacity, EC and calcium loading. Do not add irrigation solely to fit the schedule.
Product compatibility: apply CALTRATE separately from SOP, MKP, LIB and other phosphate or sulfate solutions, with appropriate flushing. Confirm the current California registration and label for SOP before purchase or use; its current status has not been verified for this example.
Research basis: UC / CDFA crop nutrition reference. Product analyses: CALTRATE label reference · SOP label reference. These references do not imply UC endorsement of NABTA products.
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Pistachios · off yearView growth stages, NABTA rates & application timing
Illustrative feeding program · agronomic review required
Example block: 1,500.0 lb marketable CPC nuts/ac; 120 trees/ac. Mature commercial planting with zero assumed soil, water or other nutrient credits.
Seasonal fertilizer nitrogen69.5 lb K2O/ac
Seasonal potassium budget110.3 lb Ca/ac
Calcium supplied by CALTRATE
How to read this schedule: bold amounts are total product pounds per acre for the entire stage. Divide them across the separate applications shown. Dates are approximate; use actual crop stage. All rates shown are for root-zone fertigation, not foliar spraying.
| Growth stage / timing | NABTA CALTRATE 15.5-0-0 + Ca19 | NABTA SOP 0-0-52 |
|---|---|---|
| DormancyBefore leaf-out | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
| Leaf-outLate Mar–Apr | 145.2 lb/acStage total: 5 separate applications × 29.0 lb/ac each | No routine application0 lb/ac in this example |
| Fruit growthMay; before shell hardening | 145.2 lb/acStage total: 5 separate applications × 29.0 lb/ac each | 53.5 lb/acStage total: 3 separate applications × 17.8 lb/ac each |
| Early summerJun | No routine application0 lb/ac in this example | 53.5 lb/acStage total: 3 separate applications × 17.8 lb/ac each |
| Summer growthJul | 145.2 lb/acStage total: 5 separate applications × 29.0 lb/ac each | 26.7 lb/acStage total: 2 separate applications × 13.4 lb/ac each |
| Late summerAug | 145.2 lb/acStage total: 5 separate applications × 29.0 lb/ac each | No routine application0 lb/ac in this example |
| Postharvest / leaf fallSep onward; no routine N | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
Assumptions & adjustments
- Same nutrient coefficients as the on-year case, but lower illustrative yield. Account for reserves and alternate bearing.
- UC suggests half the N before shell hardening and half in July–August; this draft divides each half equally.
- No September N is planned. K applications follow the UC May/June/July 40/40/20 split.
- No routine phosphorus or micronutrient dose is included. These examples assume adequate phosphorus; other nutrients require diagnostic evidence.
- Application counts are arithmetic subdivisions using 30 lb CALTRATE/ac and 20 lb SOP/ac as maximum example event sizes. Confirm current label directions, irrigation frequency, injection capacity, EC and calcium loading. Do not add irrigation solely to fit the schedule.
Product compatibility: apply CALTRATE separately from SOP, MKP, LIB and other phosphate or sulfate solutions, with appropriate flushing. Confirm the current California registration and label for SOP before purchase or use; its current status has not been verified for this example.
Research basis: UC / CDFA crop nutrition reference. Product analyses: CALTRATE label reference · SOP label reference. These references do not imply UC endorsement of NABTA products.
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02 · FRUIT TREE GROWERS
Choose your fruit crop.
Peaches · early harvestView growth stages, NABTA rates & application timing
Illustrative feeding program · agronomic review required
Example block: early harvest May–Jun; mature trees. Mature commercial planting with zero assumed soil, water or other nutrient credits.
Seasonal fertilizer nitrogenPotassium rate pending
Seasonal potassium budget91.9 lb Ca/ac
Calcium supplied by CALTRATE
How to read this schedule: bold amounts are total product pounds per acre for the entire stage. Divide them across the separate applications shown. Dates are approximate; use actual crop stage. All rates shown are for root-zone fertigation, not foliar spraying.
| Growth stage / timing | NABTA CALTRATE 15.5-0-0 + Ca19 | NABTA SOP 0-0-52 |
|---|---|---|
| Dormancy / bloomWinter to early spring | No routine application0 lb/ac in this example | Rate pendingSet the potassium budget from crop and test results. |
| Spring growth / fruit setMar–Apr | 193.5 lb/acStage total: 7 separate applications × 27.6 lb/ac each | Rate pendingSet the potassium budget from crop and test results. |
| Harvest periodMay–Jun | No routine application0 lb/ac in this example | Rate pendingSet the potassium budget from crop and test results. |
| Postharvest growthJun–Jul; active leaves | 290.3 lb/acStage total: 10 separate applications × 29.0 lb/ac each | Rate pendingSet the potassium budget from crop and test results. |
| Late summerReview vigor and leaf test | No routine application0 lb/ac in this example | Rate pendingSet the potassium budget from crop and test results. |
| Leaf fall / winterNo routine soil N | No routine application0 lb/ac in this example | Rate pendingSet the potassium budget from crop and test results. |
Assumptions & adjustments
- 75 lb N/ac is a selected example inside the UC compilation range 50–100; adjust for field credits and vigor.
- 40% spring and 60% active postharvest summer is a proposed implementation of UC early-peach timing.
- K quantity is unresolved. Blank K inputs and n.a. outputs are intentional; do not read them as zero crop demand.
- This quantified nitrogen schedule is incomplete as a whole nutrient program. Potassium quantities remain pending; no rate has been borrowed from another crop.
- No routine phosphorus or micronutrient dose is included. These examples assume adequate phosphorus; other nutrients require diagnostic evidence.
- Application counts are arithmetic subdivisions using 30 lb CALTRATE/ac and 20 lb SOP/ac as maximum example event sizes. Confirm current label directions, irrigation frequency, injection capacity, EC and calcium loading. Do not add irrigation solely to fit the schedule.
Product compatibility: apply CALTRATE separately from SOP, MKP, LIB and other phosphate or sulfate solutions, with appropriate flushing. Confirm the current California registration and label for SOP before purchase or use; its current status has not been verified for this example.
Research basis: UC / CDFA crop nutrition reference. UC nitrogen-rate compilation. Product analyses: CALTRATE label reference · SOP label reference. These references do not imply UC endorsement of NABTA products.
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Peaches · mid / late harvestView growth stages, NABTA rates & application timing
Illustrative feeding program · agronomic review required
Example block: mid/late harvest Jul–Sep; mature trees. Mature commercial planting with zero assumed soil, water or other nutrient credits.
Seasonal fertilizer nitrogenPotassium rate pending
Seasonal potassium budget91.9 lb Ca/ac
Calcium supplied by CALTRATE
How to read this schedule: bold amounts are total product pounds per acre for the entire stage. Divide them across the separate applications shown. Dates are approximate; use actual crop stage. All rates shown are for root-zone fertigation, not foliar spraying.
| Growth stage / timing | NABTA CALTRATE 15.5-0-0 + Ca19 | NABTA SOP 0-0-52 |
|---|---|---|
| Dormancy / bloomWinter to early spring | No routine application0 lb/ac in this example | Rate pendingSet the potassium budget from crop and test results. |
| Spring growth / fruit setMar–May | 290.3 lb/acStage total: 10 separate applications × 29.0 lb/ac each | Rate pendingSet the potassium budget from crop and test results. |
| Fruit developmentJun to before late harvest | 193.5 lb/acStage total: 7 separate applications × 27.6 lb/ac each | Rate pendingSet the potassium budget from crop and test results. |
| HarvestJul–Sep; cultivar dependent | No routine application0 lb/ac in this example | Rate pendingSet the potassium budget from crop and test results. |
| Postharvest assessmentNo automatic additional dose | No routine application0 lb/ac in this example | Rate pendingSet the potassium budget from crop and test results. |
| Leaf fall / winterNo routine soil N | No routine application0 lb/ac in this example | Rate pendingSet the potassium budget from crop and test results. |
Assumptions & adjustments
- 75 lb N/ac is a selected example inside the UC 50–100 range. The 60% spring share fits UC 1/2–2/3 guidance.
- The remaining 40% is placed in summer before harvest here. This timing split requires local cultivar review.
- K quantity is unresolved. This is a quantified seasonal N program with a K calculation slot, not a complete NPK prescription.
- This quantified nitrogen schedule is incomplete as a whole nutrient program. Potassium quantities remain pending; no rate has been borrowed from another crop.
- No routine phosphorus or micronutrient dose is included. These examples assume adequate phosphorus; other nutrients require diagnostic evidence.
- Application counts are arithmetic subdivisions using 30 lb CALTRATE/ac and 20 lb SOP/ac as maximum example event sizes. Confirm current label directions, irrigation frequency, injection capacity, EC and calcium loading. Do not add irrigation solely to fit the schedule.
Product compatibility: apply CALTRATE separately from SOP, MKP, LIB and other phosphate or sulfate solutions, with appropriate flushing. Confirm the current California registration and label for SOP before purchase or use; its current status has not been verified for this example.
Research basis: UC / CDFA crop nutrition reference. UC nitrogen-rate compilation. Product analyses: CALTRATE label reference · SOP label reference. These references do not imply UC endorsement of NABTA products.
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NectarinesView growth stages, NABTA rates & application timing
Illustrative feeding program · agronomic review required
Example block: mature mid/late cultivar example. Mature commercial planting with zero assumed soil, water or other nutrient credits.
Seasonal fertilizer nitrogenPotassium rate pending
Seasonal potassium budget122.6 lb Ca/ac
Calcium supplied by CALTRATE
How to read this schedule: bold amounts are total product pounds per acre for the entire stage. Divide them across the separate applications shown. Dates are approximate; use actual crop stage. All rates shown are for root-zone fertigation, not foliar spraying.
| Growth stage / timing | NABTA CALTRATE 15.5-0-0 + Ca19 | NABTA SOP 0-0-52 |
|---|---|---|
| Dormancy / bloomWinter to early spring | No routine application0 lb/ac in this example | Rate pendingSet the potassium budget from crop and test results. |
| Spring growth / fruit setMar–May | 387.1 lb/acStage total: 13 separate applications × 29.8 lb/ac each | Rate pendingSet the potassium budget from crop and test results. |
| Fruit developmentJun to before harvest | 258.1 lb/acStage total: 9 separate applications × 28.7 lb/ac each | Rate pendingSet the potassium budget from crop and test results. |
| HarvestCultivar dependent | No routine application0 lb/ac in this example | Rate pendingSet the potassium budget from crop and test results. |
| Postharvest assessmentReview summer leaf results | No routine application0 lb/ac in this example | Rate pendingSet the potassium budget from crop and test results. |
| Leaf fall / winterNo routine soil N | No routine application0 lb/ac in this example | Rate pendingSet the potassium budget from crop and test results. |
Assumptions & adjustments
- 100 lb N/ac is the lower end of the UC compilation range 100–150, selected as an example, not a block recommendation.
- 60/40 timing is a proposed adaptation of peach physiology, not a verified nectarine trial schedule.
- K quantity requires tissue/soil interpretation. Early nectarines need a different harvest and postharvest timeline.
- This quantified nitrogen schedule is incomplete as a whole nutrient program. Potassium quantities remain pending; no rate has been borrowed from another crop.
- No routine phosphorus or micronutrient dose is included. These examples assume adequate phosphorus; other nutrients require diagnostic evidence.
- Application counts are arithmetic subdivisions using 30 lb CALTRATE/ac and 20 lb SOP/ac as maximum example event sizes. Confirm current label directions, irrigation frequency, injection capacity, EC and calcium loading. Do not add irrigation solely to fit the schedule.
Product compatibility: apply CALTRATE separately from SOP, MKP, LIB and other phosphate or sulfate solutions, with appropriate flushing. Confirm the current California registration and label for SOP before purchase or use; its current status has not been verified for this example.
Research basis: UC / CDFA crop nutrition reference. Product analyses: CALTRATE label reference · SOP label reference. These references do not imply UC endorsement of NABTA products.
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Fresh plumsView growth stages, NABTA rates & application timing
Illustrative feeding program · agronomic review required
Example block: mature bearing Japanese plum example. Mature commercial planting with zero assumed soil, water or other nutrient credits.
Seasonal fertilizer nitrogenPotassium rate pending
Seasonal potassium budget134.8 lb Ca/ac
Calcium supplied by CALTRATE
How to read this schedule: bold amounts are total product pounds per acre for the entire stage. Divide them across the separate applications shown. Dates are approximate; use actual crop stage. All rates shown are for root-zone fertigation, not foliar spraying.
| Growth stage / timing | NABTA CALTRATE 15.5-0-0 + Ca19 | NABTA SOP 0-0-52 |
|---|---|---|
| Dormancy / bloomBefore active leaf growth | No routine application0 lb/ac in this example | Rate pendingSet the potassium budget from crop and test results. |
| Fruit set / spring growthMar–Apr | 283.9 lb/acStage total: 10 separate applications × 28.4 lb/ac each | Rate pendingSet the potassium budget from crop and test results. |
| Fruit developmentMay–Jun | 283.9 lb/acStage total: 10 separate applications × 28.4 lb/ac each | Rate pendingSet the potassium budget from crop and test results. |
| Summer growthJul; only while active | 141.9 lb/acStage total: 5 separate applications × 28.4 lb/ac each | Rate pendingSet the potassium budget from crop and test results. |
| Harvest / assessmentCultivar dependent | No routine application0 lb/ac in this example | Rate pendingSet the potassium budget from crop and test results. |
| Leaf fall / winterNo routine soil N | No routine application0 lb/ac in this example | Rate pendingSet the potassium budget from crop and test results. |
Assumptions & adjustments
- 110 lb N/ac is the lower end of an older UC compilation range 110–150, not a measured requirement for your orchard.
- 40/40/20 is an author-proposed split for review. Move summer timing for cultivar, vigor and actual harvest date.
- K quantity is unresolved; plum P and trace nutrients must be driven by tissue and soil evidence.
- This quantified nitrogen schedule is incomplete as a whole nutrient program. Potassium quantities remain pending; no rate has been borrowed from another crop.
- No routine phosphorus or micronutrient dose is included. These examples assume adequate phosphorus; other nutrients require diagnostic evidence.
- Application counts are arithmetic subdivisions using 30 lb CALTRATE/ac and 20 lb SOP/ac as maximum example event sizes. Confirm current label directions, irrigation frequency, injection capacity, EC and calcium loading. Do not add irrigation solely to fit the schedule.
Product compatibility: apply CALTRATE separately from SOP, MKP, LIB and other phosphate or sulfate solutions, with appropriate flushing. Confirm the current California registration and label for SOP before purchase or use; its current status has not been verified for this example.
Research basis: UC / CDFA crop nutrition reference. Product analyses: CALTRATE label reference · SOP label reference. These references do not imply UC endorsement of NABTA products.
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PrunesView growth stages, NABTA rates & application timing
Illustrative feeding program · agronomic review required
Example block: 3.0 tons DRIED fruit/ac. Mature commercial planting with zero assumed soil, water or other nutrient credits.
Seasonal fertilizer nitrogenPotassium rate pending
Seasonal potassium budget118.2 lb Ca/ac
Calcium supplied by CALTRATE
How to read this schedule: bold amounts are total product pounds per acre for the entire stage. Divide them across the separate applications shown. Dates are approximate; use actual crop stage. All rates shown are for root-zone fertigation, not foliar spraying.
| Growth stage / timing | NABTA CALTRATE 15.5-0-0 + Ca19 | NABTA SOP 0-0-52 |
|---|---|---|
| Dormancy / bloomBefore crop set | No routine application0 lb/ac in this example | Rate pendingSet the potassium budget from crop and test results. |
| Fruit setApr | 207.4 lb/acStage total: 7 separate applications × 29.6 lb/ac each | Rate pendingSet the potassium budget from crop and test results. |
| Fruit growthMay | 207.4 lb/acStage total: 7 separate applications × 29.6 lb/ac each | Rate pendingSet the potassium budget from crop and test results. |
| Fruit growthJun | 207.4 lb/acStage total: 7 separate applications × 29.6 lb/ac each | Rate pendingSet the potassium budget from crop and test results. |
| Final developmentJul | No routine application0 lb/ac in this example | Rate pendingSet the potassium budget from crop and test results. |
| Harvest / postharvestAug–Sep; reassess | No routine application0 lb/ac in this example | Rate pendingSet the potassium budget from crop and test results. |
| Leaf fallNo routine N | No routine application0 lb/ac in this example | Rate pendingSet the potassium budget from crop and test results. |
Assumptions & adjustments
- Example demand = 3 dry tons × 12.5 lb N/ton + 30 lb/ac growth. UCCE describes the growth allowance as uncertain.
- 70% recovery and equal April–June N portions are explicit draft assumptions. UCCE favors April–June N.
- If K is required and no fall K was applied, UCCE suggests equal April–July injections. Annual K amount still needs approval.
- This quantified nitrogen schedule is incomplete as a whole nutrient program. Potassium quantities remain pending; no rate has been borrowed from another crop.
- No routine phosphorus or micronutrient dose is included. These examples assume adequate phosphorus; other nutrients require diagnostic evidence.
- Application counts are arithmetic subdivisions using 30 lb CALTRATE/ac and 20 lb SOP/ac as maximum example event sizes. Confirm current label directions, irrigation frequency, injection capacity, EC and calcium loading. Do not add irrigation solely to fit the schedule.
Product compatibility: apply CALTRATE separately from SOP, MKP, LIB and other phosphate or sulfate solutions, with appropriate flushing. Confirm the current California registration and label for SOP before purchase or use; its current status has not been verified for this example.
Research basis: UC / CDFA crop nutrition reference. Product analyses: CALTRATE label reference · SOP label reference. These references do not imply UC endorsement of NABTA products.
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Citrus · mandarins, lemons & grapefruitRequest a crop-specific program
A numerical feeding schedule for mandarins, lemons or grapefruit has not yet been established. Share your cultivar, rootstock, tree age, acreage, expected yield, irrigation system and recent soil, water and tissue results so a crop-specific nutrient budget can be reviewed.
Rates from the neighboring crop examples should not be transferred to these crops.
Request a Crop ProgramCherries & apricotsRequest a crop-specific program
A numerical feeding schedule for cherries or apricots has not yet been established. Share your cultivar, rootstock, tree age, acreage, expected yield, irrigation system and recent soil, water and tissue results so a crop-specific nutrient budget can be reviewed.
Rates from the neighboring crop examples should not be transferred to these crops.
Request a Crop ProgramApples & pearsRequest a crop-specific program
A numerical feeding schedule for apples or pears has not yet been established. Share your cultivar, rootstock, tree age, acreage, expected yield, irrigation system and recent soil, water and tissue results so a crop-specific nutrient budget can be reviewed.
Rates from the neighboring crop examples should not be transferred to these crops.
Request a Crop Program03 · GRAPE GROWERS
Choose your vineyard crop.
Wine grapesView growth stages, NABTA rates & application timing
Illustrative feeding program · agronomic review required
Example block: 7.0 fresh tons/ac. Mature commercial planting with zero assumed soil, water or other nutrient credits.
Seasonal fertilizer nitrogen41.3 lb K2O/ac
Seasonal potassium budget30.6 lb Ca/ac
Calcium supplied by CALTRATE
How to read this schedule: bold amounts are total product pounds per acre for the entire stage. Divide them across the separate applications shown. Dates are approximate; use actual crop stage. All rates shown are for root-zone fertigation, not foliar spraying.
| Growth stage / timing | NABTA CALTRATE 15.5-0-0 + Ca19 | NABTA SOP 0-0-52 |
|---|---|---|
| DormancyNov–Feb | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
| After budbreakMar–Apr; after frost risk | 32.3 lb/acStage total: 2 separate applications × 16.1 lb/ac each | 11.9 lb/acStage total: 1 separate application × 11.9 lb/ac each |
| Bloom to fruit setApr–May | 48.4 lb/acStage total: 2 separate applications × 24.2 lb/ac each | 27.8 lb/acStage total: 2 separate applications × 13.9 lb/ac each |
| Berry growthMay–Jun; before veraison | 80.6 lb/acStage total: 3 separate applications × 26.9 lb/ac each | 39.7 lb/acStage total: 2 separate applications × 19.9 lb/ac each |
| Veraison to harvestJul–Oct; cultivar dependent | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
| PostharvestWhile canopy stays active | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
| Leaf fallEnd of season | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
Assumptions & adjustments
- Medium-vigor drip example: 25 lb fertilizer N/ac before credits; UC range 10–25 for comparable drip conditions.
- K replacement example: 7 fresh tons × 5.9 lb K2O/ton. Confirm tissue K, wine-quality goals and soil fixation.
- The 20/30/50 N and 15/35/50 K stage splits are proposed planning assumptions, not UC trial treatments.
- No routine phosphorus or micronutrient dose is included. These examples assume adequate phosphorus; other nutrients require diagnostic evidence.
- Application counts are arithmetic subdivisions using 30 lb CALTRATE/ac and 20 lb SOP/ac as maximum example event sizes. Confirm current label directions, irrigation frequency, injection capacity, EC and calcium loading. Do not add irrigation solely to fit the schedule.
Product compatibility: apply CALTRATE separately from SOP, MKP, LIB and other phosphate or sulfate solutions, with appropriate flushing. Confirm the current California registration and label for SOP before purchase or use; its current status has not been verified for this example.
Research basis: UC / CDFA crop nutrition reference. Product analyses: CALTRATE label reference · SOP label reference. These references do not imply UC endorsement of NABTA products.
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Table grapesView growth stages, NABTA rates & application timing
Illustrative feeding program · agronomic review required
Example block: N rate is fixed case, not yield model. Mature commercial planting with zero assumed soil, water or other nutrient credits.
Seasonal fertilizer nitrogen60.2 lb K2O/ac
Seasonal potassium budget61.3 lb Ca/ac
Calcium supplied by CALTRATE
How to read this schedule: bold amounts are total product pounds per acre for the entire stage. Divide them across the separate applications shown. Dates are approximate; use actual crop stage. All rates shown are for root-zone fertigation, not foliar spraying.
| Growth stage / timing | NABTA CALTRATE 15.5-0-0 + Ca19 | NABTA SOP 0-0-52 |
|---|---|---|
| DormancyNov–Feb | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
| After budbreakMar–Apr; after frost risk | 64.5 lb/acStage total: 3 separate applications × 21.5 lb/ac each | 17.4 lb/acStage total: 1 separate application × 17.4 lb/ac each |
| Bloom to fruit setApr–May | 96.8 lb/acStage total: 4 separate applications × 24.2 lb/ac each | 40.6 lb/acStage total: 3 separate applications × 13.5 lb/ac each |
| Berry growthMay–Jun; before veraison | 161.3 lb/acStage total: 6 separate applications × 26.9 lb/ac each | 57.9 lb/acStage total: 3 separate applications × 19.3 lb/ac each |
| Veraison to harvestJul–Oct; cultivar dependent | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
| PostharvestWhile canopy stays active | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
| Leaf fallEnd of season | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
Assumptions & adjustments
- Autumn King cost-study example: 50 lb N/ac and 50 lb elemental K/ac = 60.25 lb K2O/ac.
- This is a UC Davis 2018 production-cost assumption, not an optimum-rate experiment or every-cultivar recommendation.
- Timing is a proposed split using UC grape uptake guidance. Recheck vigor, petioles, yield and actual harvest date.
- No routine phosphorus or micronutrient dose is included. These examples assume adequate phosphorus; other nutrients require diagnostic evidence.
- Application counts are arithmetic subdivisions using 30 lb CALTRATE/ac and 20 lb SOP/ac as maximum example event sizes. Confirm current label directions, irrigation frequency, injection capacity, EC and calcium loading. Do not add irrigation solely to fit the schedule.
Product compatibility: apply CALTRATE separately from SOP, MKP, LIB and other phosphate or sulfate solutions, with appropriate flushing. Confirm the current California registration and label for SOP before purchase or use; its current status has not been verified for this example.
Research basis: UC Davis Autumn King production-cost study (2018). UC grape timing guidance. Product analyses: CALTRATE label reference · SOP label reference. These references do not imply UC endorsement of NABTA products.
Historical NABTA LIB 12-6-24 grape reference
This older manufacturer schedule is provided for comparison. Its “325 trees/acre” wording and application method need clarification, and a current label must be confirmed. It is not an additional feed to layer on top of the program above.
| Label stage | LIB 12-6-24, lb/ac |
|---|---|
| Budbreak | 20 |
| Bloom | 20 |
| Post-bloom | 30 |
| Fruit set | 30 |
| Fruit development | 35 |
| Postharvest | 25 |
The 160 lb/ac seasonal total supplies 19.2 lb N, 9.6 lb P2O5, 38.4 lb K2O, 0.96 lb Mg and 13.6 lb S. Credit every nutrient before substituting it into a block program.
Discuss Your Table grapes Program
Raisin grapesView growth stages, NABTA rates & application timing
Illustrative feeding program · agronomic review required
Example block: 10.0 fresh tons/ac BEFORE drying. Mature commercial planting with zero assumed soil, water or other nutrient credits.
Seasonal fertilizer nitrogen59.0 lb K2O/ac
Seasonal potassium budget30.6 lb Ca/ac
Calcium supplied by CALTRATE
How to read this schedule: bold amounts are total product pounds per acre for the entire stage. Divide them across the separate applications shown. Dates are approximate; use actual crop stage. All rates shown are for root-zone fertigation, not foliar spraying.
| Growth stage / timing | NABTA CALTRATE 15.5-0-0 + Ca19 | NABTA SOP 0-0-52 |
|---|---|---|
| DormancyNov–Feb | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
| After budbreakMar–Apr; after frost risk | 32.3 lb/acStage total: 2 separate applications × 16.1 lb/ac each | 17.0 lb/acStage total: 1 separate application × 17.0 lb/ac each |
| Bloom to fruit setApr–May | 48.4 lb/acStage total: 2 separate applications × 24.2 lb/ac each | 39.7 lb/acStage total: 2 separate applications × 19.9 lb/ac each |
| Berry growthMay–Jun; before veraison | 80.6 lb/acStage total: 3 separate applications × 26.9 lb/ac each | 56.7 lb/acStage total: 3 separate applications × 18.9 lb/ac each |
| Veraison to harvestJul–Oct; cultivar dependent | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
| PostharvestWhile canopy stays active | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
| Leaf fallEnd of season | No routine application0 lb/ac in this example | No routine application0 lb/ac in this example |
Assumptions & adjustments
- Medium-vigor drip example at upper end of UC 10–25 lb N/ac range; water N must be credited.
- Yield is fresh-grape tonnage, not dried raisin tonnage. K replacement uses 5.9 lb K2O per fresh ton.
- The percentage splits are proposed. No routine late N; postharvest N requires active leaves and a revised budget.
- No routine phosphorus or micronutrient dose is included. These examples assume adequate phosphorus; other nutrients require diagnostic evidence.
- Application counts are arithmetic subdivisions using 30 lb CALTRATE/ac and 20 lb SOP/ac as maximum example event sizes. Confirm current label directions, irrigation frequency, injection capacity, EC and calcium loading. Do not add irrigation solely to fit the schedule.
Product compatibility: apply CALTRATE separately from SOP, MKP, LIB and other phosphate or sulfate solutions, with appropriate flushing. Confirm the current California registration and label for SOP before purchase or use; its current status has not been verified for this example.
Research basis: UC / CDFA crop nutrition reference. Product analyses: CALTRATE label reference · SOP label reference. These references do not imply UC endorsement of NABTA products.
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Build a program for your own block.
Tell NABTA USA your crop and variety, acreage, tree or vine age, expected yield, irrigation method, and recent soil, water and tissue results. Include your adviser’s nutrient targets when available.
Ask about bulk product supply and specialty blends. Exact blend analyses, nutrient credits, current labels and application directions must be confirmed before substitution.
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