Photo Gallery
- Lime and soil pH
- Manure
- Nitrogen
- Nutrient deficiencies
- Nutrients and water quality
- Phosphorus
- Potassium
- Secondary and micronutrients
- Soil sampling and testing
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If you wish to use a photograph from the Soil Fertility website photo gallery, please contact John Sawyer at jsawyer@iastate.edu for permission. Once permission is granted, then acknowledge the source of the photo; person credit and the Iowa State University Extension and Outreach Soil Fertility online site.
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