Plant Logic

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.
Phosphorus	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.
Potassium	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.
Boron	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.

Pecan
Nitrogen	N<2.5	PECAN:04	The trees are low in N. For next year's crop, apply 200 pounds of nitrogen per acre.
	N>=2.5 and N<2.7	PECAN:05	The nitrogen (N) content of the trees is approaching a low level. For next year's crop, apply 100-150 pounds of nitrogen per acre. The rate of nitrogen selected should be such that shoot growth on at least 50% of the trees be between 8-12 inches.
	N>=2.7 and N<3.0	PECAN:06	The nitrogen (N) level of the trees is adequate for optimum production. For next year's crop, apply 100 pounds of nitrogen per acre as a maintenance application.
	N>=3.0	PECAN:08	The nitrogen (N) level of the trees is approaching a high level, therefore, there is no need to apply additional nitrogen to next year's crop. Take leaf samples again next year.
Phosphorus	P<0.12	PECAN:09	The trees are low in phosphorus. For next year's crop, apply 100 pounds of phosphate (P₂O₅) per acre.
	P>=0.12 and P<0.14	PECAN:10	The phosphorus (P) content is approaching a low level. If the soil test phosphorus level is low or medium, for next year's crop apply 100 pounds of phosphate (P₂O₅) per acre. If the soil phosphorus level is high or very high, there is no need to apply additional phosphate next year.
	P>=0.14	PECAN:02	The phosphorus (P) status of the trees is within the desired range. Therefore, there is no need to apply additional phosphate (P₂O₅) to next year's crop.
Potassium	K<1.25	PECAN:11	The potassium (K) content of the trees is low. For next year's crop, apply 100 pounds of potash (K₂O) per acre in order to maintain good tree vigor and to reduce chances of winter injury. Also apply a foliar spray using 2 to 4 pounds of potassium nitrate per 100 gallons of water with the second and third cover sprays.
Potassium	K>=1.25	PECAN:03	The potassium (K) status of the trees is within the desired range. Therefore, there is no need to apply additional potash (K₂O) to next year's crop.
Magnesium	Mg<=0.25	PECAN:14	The magnesium (Mg) content of the trees is low. Apply dolomitic limestone according to soil test recommendations and 20 pounds of Magnesium per acre. In addition apply a foliar application of magnesium using 3-5 pounds of magnesium sulfate/100 gallons of water.
Magnesium	Mg>0.25 and Mg<=0.30	PECAN:13	The magnesium (Mg) content of the trees is approaching a deficient level. If soil test results indicate that lime is needed, apply dolomitic limestone. If no lime is needed, apply 20 pounds of Magnesium per acre.
Zinc	Zn<30	PECAN:16	The trees are deficient in zinc (Zn). For next year's crop, apply 100-150 pounds of zinc sulfate per acre and 2 pounds zinc sulfate per 100 gallons of water with the first three leaf sprays.
Zinc	Zn>=30 and Zn<50	PECAN:15	The trees are low in zinc (Zn). If the soil test zinc level is less than 20 pounds per acre, broadcast 30-50 pounds of zinc sulfate per acre. If the soil test zinc level is greater than 20 pounds per acre, apply 2 pounds of zinc sulfate per 100 gallons of water with the first three leaf sprays.
Sulfur	S<0.2	PECAN:17	The S level of the trees is low. Include 20 pounds Sulfur per acre in next year's fertilization program.
Nickel	Ni<5	PECAN:24	The trees are low in nickel (Ni). Apply 24 ounces of nickel lignosulfonate (containing 6% Ni) per acre or an equivalent product that supplies 1 and one half ounces of Ni per acre. Make the first application at 10-24 days following budbreak, followed by an additional application 2-4 weeks later. Where mouse ear symptoms persist, an additional application may be warranted in September or early October before leaf fall.
Copper	Cu<6	PECAN:25	The trees are low in copper (Cu). Apply copper sulfate or a copper chelate at a rate of 8 to 12 ounces per acre 3 to 4 weeks after budbreak.

Peach
Nitrogen	N<2.75	PEACH:03	The trees are low in nitrogen (N). For next year's crop apply 30-60 pounds nitrogen per acre after harvest but no later than early September and 40-60 pounds nitrogen per acre in the herbicide band in late January in extreme south Georgia or early-mid February for the remainder of the state. If the nitrogen is broadcast, increase the application rate by 30%.
Nitrogen	N>=2.75	PEACH:02	The nitrogen (N) content of the trees is adequate. For next year's fertilization program apply 20-50 pounds nitrogen per acre after harvest but no later than early September and 30-60 pounds nitrogen per acre in the herbicide band in late January in extreme south Georgia or early-mid February for the remainder of the state. If the nitrogen is broadcast, increase the application rate by 30%.
Phosphorus	P<0.12	PEACH:05	The phosphorus (P) content of the trees is low. For next year's crop apply 60 pounds phosphate (P₂O₅) per acre.
Phosphorus	P>=0.12	PEACH:04	The phosphorus (P) content of the trees is adequate for good growth, therefore, there is no need to apply additional phosphate (P₂O₅) next year.
Potassium	K<1.50	PEACH:08	The potassium (K) content of the trees is low. For next year's crop, apply 80-100 pounds of potash (K₂O) per acre.
	K>=1.50 and K<1.75	PEACH:07	The potassium (K) content of the trees is approaching a low level. For next year's crop apply 50-70 pounds of potash (K₂O) per acre.
	K>=1.75 and K<2.50	PEACH:09	The potassium (K) content of the trees is adequate for good growth. For maintenance purposes, apply 30-50 pounds potash (K₂O) per acre next year.
	K>=2.50	PEACH:06	The potassium (K) content of the trees is adequate for good growth, therefore, there is no need to apply additional potash (K₂O) to next year's crop.
Copper	Cu<5	PEACH:10	The trees are low in copper (Cu). In order to alleviate this problem, apply 3-4 pounds of Cu per acre (12-16 pounds of copper sulfate per acre). This can be applied along with the nitrogen or complete fertilizer.
Zinc	Zn<15	PEACH:11	The trees are low in zinc (Zn). In order to alleviate this problem, apply 3 to 5 pounds of actual zinc per acre (8-15 pounds zinc sulfate per acre) in next year's fertilization program.
Calcium	Ca<1.25	PEACH:13	The calcium (Ca) content of the trees is low, and is generally due to low soil pH. Soil test and apply limestone based on soil test recommendations.
Magnesium	Mg<0.25	PEACH:14	The magnesium (Mg) content of the trees is low and is generally due to low soil pH and/or low soil test magnesium level. Soil test and follow limestone recommendations, using dolomitic limestone.
Boron	B<20	PEACH:15	The boron (B) content of the trees is low, therefore, include 0.5 pound of Boron per acre in the next year's fertilizer program. The boron may be soil applied at the rate of 0.5 pounds per acre or applied in two foliar applications at the rate of 0.25 pounds Boron per acre per application. Apply in sufficient water to completely wet the foliage.
Boron	B>45	PEACH:16	The boron (B) content of the trees is high. Discontinue applications of boron in fertilizers or foliar sprays as boron levels greater than 50 ppm can be toxic.
Sulfur	S<0.12	PEACH:17	The S content of the trees is low, therefore, include a minimum of 10 pounds Sulfur per acre in the next year's fertilizer program.
All good	N>=2.75, P>=0.12, K>=1.75, Cu>=5, Mg>=0.25, Zn>=15, Ca>=1.5, (B>=20 and B<=45)	PEACH:01	All elements are sufficient for good growth. For next year's fertilization program apply: 20-50 pounds nitrogen per acre after harvest, but no later than early September, and 30-60 pounds nitrogen per acre in the herbicide band in late January in extreme south Georgia or early-mid February for the remainder of the state. If the nitrogen is broadcast, increase the application by 30%.

Muscadine
Nitrogen	N<1.65	MUSC:01	The nitrogen (N) level is low. Apply 60 pounds nitrogen per acre after fruit set and 50-60 pounds of nitrogen per acre in the spring.
	N>=1.65 and N<=2.15	MUSC:02	The nitrogen level is adequate for good growth. Apply 30 pounds of nitrogen per acre after fruit set and 50-60 pounds of nitrogen per acre in the spring.
	N>2.15	MUSC:03	The nitrogen (N) level is high. Apply 15 pounds of nitrogen per acre after fruit set and 25 to 30 pounds of nitrogen per acre in the spring.
Phosphorus	P<0.12	MUSC:04	The phosphorus (P) level is low. For next year's fertilization program, apply 100 pounds of phosphate (P₂O₅) per acre.
	P>=0.12 and P<=0.16	MUSC:05	The phosphorus (P) level is adequate for good growth. For next year's fertilization program, apply 40 to 50 pounds of phosphate (P₂O₅) per acre.
	P>0.16	MUSC:06	The phosphorus (P) level is high, therefore, phosphate (P₂O₅) can be omitted from next year's fertilization program.
Potassium	K<0.80	MUSC:07	The potassium (K) level is low and is generally due to low soil test potassium levels or a heavy fruit set. For next year's fertilization program, apply 100-125 pounds of potash (K₂O) per acre.
	K>=0.80 and K<=1.20	MUSC:08	The potassium (K) level is adequate for good growth. For next year's fertilization program apply 40 to 60 pounds of potash (K₂O) per acre.
	K>1.20	MUSC:09	The potassium (K) level is high, therefore, potash (K₂O) can be omitted from next year's fertilization program.
Magnesium	Mg<0.15	MUSC:10	If the pH is below 5.5, apply dolomitic limestone based on soil test recommendations. If the soil pH is between 5.5 - 6.0, apply a soluble source of magnesium such as potassium-magnesium sulfate or magnesium sulfate (Epsom salt) at a rate to supply the equivalent of 25 pounds Magnesium per acre.
Boron	B<15	MUSC:11	Broadcast 1/2 pound Boron per acre (5 pounds Borax or 2 1/2 pounds Solubor per acre) every two years. (Note: This can be mixed with water and sprayed on the soil surface). The boron requirement can also be met by spraying the foliage with Solubor at the rate of 1 pound (0.2 pound Boron per acre) per acre just prior to bloom. DO NOT EXCEED thE SUGGESTED RATES.
Calcium	Ca<0.70	MUSC:12	The calcium (Ca) level is low. This is usually due to low soil test calcium levels. Check the soil pH and apply limestone according to soil test recommendations. Maintaining the soil pH between 5.5 and 6.0 will generally supply sufficient calcium to keep the calcium level in the plants at or above 0.70%.

Strawberry
Fact Sheet	All levels	STRAW:00	In general, preplant fertilization satisfies the nutritional needs of the crop until early Spring growth begins (mid-February in south Georgia and mid-March in north Georgia). Sample new leaves in December to determine the boron (B) level in the plant. Start fertilizer injection through the irrigation system when Spring growth begins. Continue fertilizer injection until one week before harvest ends. Sample strawberry leaves to monitor nutrient status immediately after vigorous growth begins in early Spring. Then continue to sample leaves and monitor nutrient levels monthly through the season.
Nitrogen	N<2.80	STRAW:01	The nitrogen (N) level is low. Increase N fertilizer injection through the drip system approximately 50% to 0.9 pounds N per acre per day (6 pounds N per acre per week) for sandy soils or to 0.75 pounds N per acre per day (5 pounds N per acre per week) for heavier soils for two weeks. Then retest.
	N>=2.80 and N<=3.80	STRAW:02	The nitrogen (N) level is adequate for good growth. Continue present N fertilization program of injecting 0.6 pounds N per acre per day (4 pounds N per acre per week) for sandy soils or 0.5 pounds N per acre per day (3½ pounds N per acre per week) for heavier soils.
	N>3.80	STRAW:03	The nitrogen (N) level is high. The rate of N injection can be reduced by 30%. Retest in two weeks.
Phosphorus	P<0.20	STRAW:04	The phosphorus (P) level is low, which may be due to low soil test P. If soil test phosphorus is medium or higher, look for other causes for the low phosphorus. Phosphoric acid or monopotassium phosphate may be injected into the soil at a rate of 10 to 15 pounds P₂O₅ per acre.
	P>=0.20 and P<=0.45	STRAW:05	The phosphorus (P) level is within the desired range. Continue present program.
	P>0.45	STRAW:06	The phosphorus (P) level is high. For future crops, test soil and follow P fertilizer recommendations.
Potassium	K<1.40	STRAW:07	The potassium (K) level is low. Apply 7-0-7 or 4-0-8 through the drip irrigation system to meet both N and K needs. Apply at a rate of 5 pounds K₂O per acre per week. Retest in 3 weeks.
	K>=1.40 and K<=2.50	STRAW:08	The potassium (K) level is within the desired range.
	K>2.50	STRAW:09	The potassium (K) level is higher than necessary. Skip application of K for two weeks and then retest. For future crops, test soil and follow K fertilizer recommendations.
Calcium	Ca<0.50	STRAW:10	The calcium (Ca) level is low. Consider using calcium nitrate as your primary N source. Low Ca levels are usually corrected by application of limestone based on soil test recommendations. Maintaining soil pH between 6.0 and 6.5 will generally ensure that Ca is sufficient.
Magnesium	Mg<0.25	STRAW:11	The magnesium (Mg) level is low. Magnesium sulfate can be injected at a rate of 20 pounds per acre per week. Retest in 3 weeks. Low Mg levels are usually corrected by application of dolomitic limestone based on soil test recommendations. If soil pH is adequate and soil test Mg is low, magnesium salts such as magnesium sulfate can be soil applied to correct the problem.
Sulfur	S<0.15	STRAW:12	The sulfur (S) level is low. In order to supply S to plants, apply materials such as potassium thiosulfate, calcium thiosulfate, or magnesium sulfate at a rate of 2 pounds of S per acre per week.
Iron	Fe<50	STRAW:13	The iron (Fe) level is low and very difficult to correct if soil pH is too high. Soil testing for proper pH adjustment avoids this problem. Foliar application of chelated iron such as FeEDTA plus a surfactant may be partially effective.
Boron	B<25	STRAW:14	The boron (B) level is low. Supply 1/8 pound of actual boron (0.6 pounds of Solubor) per acre through the drip irrigation system or as a foliar application prior to bloom or as needed during the growing season. Typically, one application of boron is sufficient to correct a deficiency for the rest of the growing season. Do not over apply boron.
Copper	Cu<5	STRAW:15	The copper (Cu) level is low. Apply copper chelate in a foliar application following manufacturer's directions, or inject no more than 1/2 pound of copper sulfate (1/8 pound of Cu) per acre through the irrigation system.
Zinc	Zn<20	STRAW:16	The zinc (Zn) level is low. Apply zinc chelate in a foliar application following manufacturer's directions, or inject no more than 3/8 pound of zinc sulfate (1/8 pound of Zn) per acre or an equivalent amount of another soluble zinc fertilizer through the drip irrigation system.
Manganese	Mn<30	STRAW:17	The manganese (Mn) level is low. Apply 1½ pounds of manganese sulfate per acre in a foliar application or apply 1/2 pound of manganese sulfate per acre through the drip irrigation system.

Code:

Comment	Blueberry, Southern Highbush in Soil or Amended Soil	Blueberry, Southern Highbush in Pine Bark	Blueberry, other
Sample Time	PC 'Blueberry:00'	PC 'Blueberry:00'	PC 'Blueberry:00'
Nitrogen (N)	if N<1.80 then PC 'SHBlueberry:01' else if N<=2.10 then PC 'SHBlueberry:02' else PC 'SHBlueberry:03'	if N<1.80 then PC 'SHPBlueberry:01' else if N<=2.10 then PC 'SHPBlueberry:02' else PC 'SHPBlueberry:03'	if N<1.20 then PC 'Blueberry:01' else if N<=1.70 then PC 'Blueberry:02' else PC 'Blueberry:03'
Phosphorus (P)	if P<0.12 then PC 'Blueberry:04' else if P<=0.40 then PC 'Blueberry:05' else PC 'Blueberry:06'	if P<0.12 then PC 'SHPBlueberry:04' else if P<=0.40 then PC 'SHPBlueberry:05' else PC 'SHPBlueberry:06'	if P<0.08 then PC 'Blueberry:04' else if P<=0.20 then PC 'Blueberry:05' else PC 'Blueberry:06'
Potassium (K)	if K<0.35 then PC 'Blueberry:07' else if K<=0.65 then PC 'Blueberry:08' else PC 'Blueberry:09'	if K<0.35 then PC 'SHPBlueberry:07' else if K<=0.65 then PC 'SHPBlueberry:08' else PC 'SHPBlueberry:09'	if K<0.35 then PC 'Blueberry:07' else if K<=0.60 then PC 'Blueberry:08' else PC 'Blueberry:09'
Magnesium (Mg)	if Mg<0.12 then PC 'Blueberry:10'	if Mg<0.12 then PC 'SHPBlueberry:10'	if Mg<0.14 then PC 'Blueberry:10'
Sulfur (S)	if S<0.12 then PC 'Blueberry:11'	if S<0.12 then PC 'SHPBlueberry:11'	if S<0.11 then PC 'Blueberry:11'
Manganese (Mn)	if Mn<50 then PC 'Blueberry:12'	if Mn<50 then PC 'SHPBlueberry:12' else if Mn>450 then PC 'SHPBlueberry:16'	if Mn<25 then PC 'Blueberry:12'
Iron (Fe)	if Fe<60 then PC 'Blueberry:13'	if Fe<60 then PC 'Blueberry:13'	if Fe<25 then PC 'Blueberry:13'
Boron (B)	if B<30 then PC 'Blueberry:14'	if B<30 then PC 'SHPBlueberry:14' else if B>200 then PC 'SHPBlueberry:17'	if B<12 then PC 'Blueberry:14'
Zinc (Zn)	if Zn<8 then PC 'Blueberry:15'	if Zn<8 then PC 'SHPBlueberry:15'	if Zn<10 then PC 'Blueberry:15'
Copper (Cu)	if Cu<4 then PC 'Blueberry:16'	if Cu<4 then PC 'Blueberry:16'	if Cu<4 then PC 'Blueberry:16'
All other elements	PC 'Blueberry:17'	PC 'Blueberry:17'	PC 'Blueberry:17'

Comments:

ID	COMMENT
Blueberry:00
Blueberry:01
Blueberry:02
Blueberry:03
Blueberry:04
Blueberry:05
Blueberry:06
Blueberry:07
Blueberry:08
Blueberry:09
Blueberry:10
Blueberry:11
Blueberry:12
Blueberry:13
Blueberry:14
Blueberry:15
Blueberry:16
Blueberry:17
SHBlueberry:01
SHBlueberry:02
SHBlueberry:03
SHPBlueberry:01
SHPBlueberry:02
SHPBlueberry:03
SHPBlueberry:04
SHPBlueberry:05
SHPBlueberry:06
SHPBlueberry:07
SHPBlueberry:08
SHPBlueberry:09
SHPBlueberry:10
SHPBlueberry:11
SHPBlueberry:12
SHPBlueberry:14
SHPBlueberry:15
SHPBlueberry:16
SHPBlueberry:17