UGA-SPW Plant Tissue Logic Apple Blueberry Muscadine Peach Pecan Strawberry Apple Nitrogen N<1.9 APPLE:03 The nitrogen (N) level in the tissue is low. For next year's crop, apply 0.3 - 0.6 pounds nitrogen per tree. If this year's terminal growth was less than 8 inches on trees that set a good crop, use higher nitrogen rate; if terminal growth was 8 inches or more, lower the rate of nitrogen. Where vigor is low, nitrogen can also be supplied by spraying low biuret urea at 6 to 12 pounds per acre after bloom but not in late cover sprays. N>=1.9 and N<=2.3 APPLE:01 The nitrogen (N) level in the tissue is adequate for good growth. For next year's crop, apply 0 - 0.60 pounds nitrogen per tree. If this year's terminal growth was less than 8 inches on trees that set a good crop, use the higher nitrogen rate; if terminal growth was 8 inches or more, lower the rate of nitrogen. If terminal growth was greater than 15 inches, do not apply any nitrogen. N>2.3 APPLE:02 The nitrogen (N) level in the tissue is high. For next year's crop, apply 0 - 0.60 pounds nitrogen per tree. If this year's terminal growth was less than 8 inches on trees that set a good crop, use the higher nitrogen rate; if terminal growth was 8 inches or more, lower the rate of nitrogen. If terminal growth was greater than 15 inches, do not apply any nitrogen. Phosphorus P<0.15 APPLE:06 The phosphorus (P) status of the trees is low. For next year's crop apply 60 pounds phosphate (P2O5) per acre. If the soil test phosphorus level is high do not apply additional phosphate next year. Pull leaf samples again next year to monitor the phosphorus status of the trees. P>=0.15 APPLE:05 The phosphorus (P) status of the trees is adequate for good growth; therefore there is no need to apply additional phosphate (P2O5) to next year's crop. Potassium K<1.25 APPLE:08 The potassium (K) status of the trees is low. For next year's crop apply 60 pounds potash (K2O) per acre. If the soil test potassium level is high do not apply any potash next year. Pull leaf samples again next year to monitor the potassium status of the trees. K>=1.25 APPLE:07 The potassium (K) status of the trees is adequate for good growth; therefore there is no need to apply additional potash (K2O) to next year's crop. Calcium Ca<1.0 APPLE:09 The calcium (CA) level is low. Apply limestone to adjust soil pH to 6.5. Also apply in all cover sprays, calcium chloride at 2 pounds per 100 gallons (maximum of 3 - 6 pounds per acre) or calcium nitrate at 3 pounds per 100 gallons (maximum of 4.5 - 9 pounds per acre). Do not apply when temperatures exceed 90 F. Higher rates can cause foliage burn and should not be re-applied unless at least 1/2" of rain has fallen since previous application. Boron B<25 APPLE:11 The boron (B) level is low. For corrective treatment, apply a foliar application of boron, using 1 to 2 pounds of Solubor or Foliarel per 100 gallons (2 to 4 pounds per acre) at both petal fall and first spray. CAUTION: Do not exceed the recommended rate as excessive boron may cause injury or death to trees. B>=25 APPLE:10 The boron (B) is adequate for good growth. For maintenance, apply Solubor or Foliarel at 1 to 2 pounds per 100 gallons (2 - 4 pounds per acre) at petal fall spray. CAUTION: Do not exceed the recommended rate as excessive use of boron may cause injury or death to trees. Zinc Zn<20 APPLE:12 The zinc level is low. For corrective treatment apply a foliar application in mid-October using 3 pounds of zinc sulfate per acre in 100 or more gallons of water per acre. Magnesium Mg<0.25 APPLE:14 The magnesium (Mg) level is low, which is generally due to low soil pH and /or low soil test Mg. If soil pH is less than 6, follow recommendations for application of dolomitic limestone from a soil test. If soil pH is 6 or higher and Mg is low, soil apply 20 pounds of Mg per acre as magnesium sulfate (Epsom Salts). To get a quick response, Epsom Salts may be included in normal pesticide applications by adding 15 pounds of Epsom Salts per 100 gallons of water in the petal fall, first cover and second cover sprays.