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Be Cautious When Interpreting Fall Soil-Test Results Following Drought

October 14, 2020
ICM News

Sampling soil this fall following the dry conditions this past summer, and in some places continuing up to this time, may result in lower than expected soil-test results for phosphorus (P), potassium (K), and pH. Especially if soil samples are collected before any significant rainfall. Therefore, farmers and crop consultants should interpret those soil-test results with caution.

Category: 
Soil Fertility
Tags: 
soils
fall soil test
drought

Phosphorus, Potassium, and pH Management Following Drought Affected Crops

August 18, 2017
ICM News
Relationship between corn and soybean grain yield and P or K removal with harvest across many trial sites, years, and treatments in Iowa

Dry conditions this summer in some parts of Iowa will result in low and variable crop yield. Low or variable crop growth and yield significantly affect phosphorus (P) and potassium (K) uptake and removal with harvest. If dry conditions continue into the fall soil sampling season soil-test P, K, and pH results also may be affected complicating test interpretations.

Category: 
Crop Production
Soil Fertility
Crops: 
Corn
Soybean
Biomass and Forage
Tags: 
fall fertilization
fertilizer management
fall soil test
soil test interpretations
nutrient removal
drought
phosphorus
potassium
pH
lime recommendations