• Extension Publications
• Newsletter Articles
• Conference Proceedings and Reports
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Extension Publications (pdf)

• PM 1688 A General Guide for Crop Nutrient and Limestone Recommendations in Iowa
• ST 8 Soil Sample Information Sheet
• ST 11 Soil Sample Information Sheet for horticulture crops

Newsletter Articles

• Ag lime impact on yield in several tillage systems (9/1999)
• Effective use of precision agriculture for improved management of phosphorus, potassium and lime (5/1999)

Conference Proceedings and Reports

• Holmes, J., and P. Kassel. 2006. Can ground eggshells be used as a liming source? p. 235-238. In Proc. 18th Annual Integrated Crop Manag. Conf., Ames, IA. 29-30 Nov. 2006. Iowa State Univ., Ames, IA. (pdf)
• Kassel, P. 2004. Lime and tillage research project. ISRF04-29, 31 Annual Progress Report, Northwest Research and Demonstration Farm, Iowa State University.
• Kassel, P. 2002. Lime and tillage research project. ISRF02-29, 31 Annual Progress Report, Northwest Research and Demonstration Farm, Iowa State University. (pdf)
• Kassel, P., J.E. Sawyer, D. Haden, D. Barker. 2000. Soil pH and corn-soybean rotation yield responses to limestone application and tillage. p. 193. In Proc. Thirtieth North Central Extension-Industry Soil Fertility Conf., St. Louis, MO. 15-16 Nov. Potash and Phosphate Inst., Brookings, SD. (pdf)
• Kassel, P. 1999. Lime and tillage research report. p. 17-18. ISRF99-29,31 Annual Progress Report, Northwest Research and Demonstration Farm, Iowa State Universtiy. (pdf)
• Sawyer, J.E. 1999. Making every fertilizer dollar pay. p. 63-78. In Proc. Integrated Crop Manag. Conf., Ames, IA. 1-2 Dec. Iowa State Univ., Ames, IA. (pdf)
• Mallarino, A.P., and D. Wittry. 1998. Soil sampling strategies for variable rate P and K fertilization and liming. p. 251-256. In The Integrated Crop Management Conference. Proceedings. Nov. 17-18, 1998. Iowa State Univ. Extension. Ames.
• Sawyer, J.E. 1998. Managing crop nutrients and limestone with reduced financial resources. p. 33-36. In Proc. Integrated Crop Manag. Conf., Ames, IA. 17-18 Nov. Iowa State Univ., Ames, IA.
• Sawyer, J.E. 1998. Managing Crop Nutrients and Limestone - Reducing Production Costs. In Farm Economy Issues Paper. Iowa State Univ. Extension, Ames, IA.
• Mallarino, A.P., and D.J. Dunn. 1995. Soil test interpretations for Iowa high pH soils. p. 175-180. In The integrated crop management conference. Proceedings. 29-30 Nov. Iowa State Univ. Extension.

Abstracts

• Bianchini, A.A., A.P. Mallarino, and D.J. Wittry. 2000. Variable-rate liming for the corn-soybean rotation. p. 367. In Agronomy Abstracts, ASA, Madison, WI.
• Kassel, P., J.E. Sawyer, D. Haden, S. Parker. 1999. Soil pH and corn-soybean rotation yield responses to limestone application and tillage. p. 260. In Agronomy abstracts, ASA, Madison, WI.
• Clark, K.N., T.R. Peck, and J.E. Sawyer. 1994. A comparison of plow layer distributed versus surface applied limestone in no-till crop production. p. 321. In Agronomy abstracts, ASA, Madison, WI.
• Sawyer, J.E., R.G. Hoeft, and L.V. Boone. 1989. Effect of lime quality on soil pH. p. 251. In Agronomy abstracts, ASA, Madison, WI.

Presentations

• Soil pH and liming (pdf). 2004 Soil Fertility and Nutrient Management Short Course, Iowa State Univ.

Links

• ISU Research and Demonstration Farms Annual Progress Reports

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