Soil Fertility

Nonconventional Additives and Byproducts

• Extension Publications
• Newsletter Articles
• Conference Proceedings and Reports
• Photo Gallery
• Presentations
• Links

Extension Publications

• SF-1321 Effectiveness of Gypsum in the North-Central Region of the U.S.
• Non-Traditional Soil Amendments and Growth Stimulants - Searchable Compendium
• NCR-533 Soil Cation Ratios for Crop Production
• NCR-347 Crop Responses to AmiSorb in the North Central Region (pdf)
• NCR-343 Impact of "ACA" on Crop Yield in the North Central Region
• NCR-341 Effectiveness of Using Low Rates of Plant Nutrients
• Nonconventional Soil Additives: Products, Companies, Ingredients and Claims (pdf)

Newsletter Articles

• Soil calcium:magnesium ratios (4/2003)
• Gypsum: an old product with a new use? (4/2003)
• Nonconventional soil additives (4/21/2003)

Conference Proceedings and Reports

• Rehm, G. 2003. Is there a role for gypsum in Midwest agriculture? p. 99-103. In Proc. Thirty Third North Central Extension-Industry Soil Fertility Conf., Des Moines, IA. 19-20 Nov. 2003. Potash and Phosphate Inst., Brookings, SD

Presentations

• Gypsum (pdf) 2004 Crop Advantage Series, Iowa State Univ.

Links

• Non-Traditional Soil Amendments and Growth Stimulants - Searchable Compendium
• NCERA103: Specialized Soil Amendments and Products, Growth Stimulants and Soil Fertility Management Programs (NCR-103)
• ISU Research and Demonstration Farms Annual Progress Reports
• Iowa Department of Agriculture and Land Stewardship, Feed & Fertilizer Bureau, Laws and Rules