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Soil Fertility Home Page
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Soil Fertility
Nutrient Topics
Lime and soil pH
Manure nutrients
Nitrogen
Nutrient deficiencies
Nutrient management planning
Nonconventional additives & byproducts
Nutrients & water quality
Phosphorus
Potassium
Secondary & micronutrients
Soil sampling & testing
Soil test interpretations & recommendations
Photo Gallery
Tools
Links
Weather/Climate
ISU College of Agriculture and Life Sciences
ISU Agronomy Extension
ISU Agronomy
ISU Extension
Contact
John Sawyer
(515) 294-7078
Photo Gallery: Soil Sampling and Testing
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Sampling in the field
Closeup of sampling
Core sample
Checking core depth