CROP NUTRITION
Fresh plums.
Plan by growth stage.
Explore a seasonal NABTA product example for mature fresh plums, with growth-stage timing, stage quantities and separate application amounts.
Planning example for agronomic review. These calculations use stated assumptions and are not field-validated NABTA recommendations. Adjust for block tests, crop load, water nutrients, salinity and irrigation capacity before field use. Use current product labels.
Mature-acre rates do not apply to young plantings. Missing information is identified in each program. No yield guarantee or UC endorsement is implied.
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.
Print / Save PDFDiscuss Your Fresh plums ProgramPlan for your own block.
Include crop and variety, acreage, planting age, expected yield, irrigation method and recent test results. Ask about current product supply or a specialty blend.
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