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library:articles:interpreting_lawn_and_garden_soil_results 2010/03/17 15:20 library:articles:interpreting_lawn_and_garden_soil_results 2013/07/15 09:42 current
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  - Don't apply N to perennial plants after about mid-September. Excess N in the fall can increase the plants susceptibility to winter damage.   - Don't apply N to perennial plants after about mid-September. Excess N in the fall can increase the plants susceptibility to winter damage.
- ==== Phosphorous (P, P<sub>2</sub>O<sub>5</sub>)==== + ==== Phosphorus (P, P<sub>2</sub>O<sub>5</sub>)====
  - If your soil test is Poor or Medium, you can apply more phosphorus than is recommended. However, a higher rate of application will primarily increase the soil test and is not likely to improve plant growth in the year it is applied.   - If your soil test is Poor or Medium, you can apply more phosphorus than is recommended. However, a higher rate of application will primarily increase the soil test and is not likely to improve plant growth in the year it is applied.
  - If your soil phosphorus is already high, it could be interfering with the uptake of some micronutrients like zinc (Zn), copper (Cu), or others, and more will only make the problem worse.   - If your soil phosphorus is already high, it could be interfering with the uptake of some micronutrients like zinc (Zn), copper (Cu), or others, and more will only make the problem worse.
 +
==== Potassium (K, K<sub>2</sub>O), Calcium (Ca), and Magnesium (Mg)==== ==== Potassium (K, K<sub>2</sub>O), Calcium (Ca), and Magnesium (Mg)====
  - These three elements tend to compete with each other for uptake by the plant. An excess of one can tend to suppress the uptake of the others.   - These three elements tend to compete with each other for uptake by the plant. An excess of one can tend to suppress the uptake of the others.
 
library/articles/interpreting_lawn_and_garden_soil_results.txt · Last modified: 2013/07/15 09:42 by bill