Nutrient Topic: Soil Sampling and Testing

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

Extension Publications (pdf)

• PM 287 Take a Good Sample to Help Make Good Decisions
• NCR 348 Soil Sampling for Variable Rate Fertilization and Lime Application
• NMEP1 Nutrient Management: Soil Testing
• PM 1310 Interpretation of Soil Test Results
• PM 1714 Nitrogen Fertilizer Recommendations for Corn in Iowa
• NCR 221 (Revised) Recommended Chemical Soil Test Procedures
• SP 126 Interpreting Mehlich-3 Soil Test Results
• ST 8 Soil Sample Information Sheet
• ST 11 Soil Sample Information Sheet for Horticulture Crops
• LSNT for Corn: Soil Sample Information Sheet

Newsletter Articles

• Interpreting results of the Mehlich-3 ICP soil phosphorus test (11/2003)
• Soil testing and available phosphorus (9/2000)
• Effective use of precision agriculture for improved management of phosphorus, potassium and lime (5/1999)
• Interpreting P and K soil test results (1/1999)
• Sampling fields for nitrate in late spring (4/1998)

Conference Proceedings and Reports

• Mallarino, A.P, and T.S. Murrell. 2004. Detecting phosphorus with plasma emission spectroscopy may require unique field calibration data. Better Crops Plant Food 88(2):12-15. (pdf)
• Mallarino, A.P., D.J. Wittry, and P.A. Barbagelata. 2003. New soil test interpretation classes for potassium. Better Crops Plant Food 87(4):12-14. (pdf)
• Mallarino, A.P., D.J. Wittry, and P.A. Barbagelata. 2002. Iowa soil-test field calibration research update: Potassium and the Mehlich-3 ICP phosphorus test. p. 29-39. In North-Central Extension-Industry Soil Fertility Conf. Proceedings. Vol. 17. Des Moines, IA. (pdf)
• Mallarino, A.P., and D. Wittry. 2001. Management zones soil sampling: A better alternative to grid and soil type sampling? p. 159-164. In The Integrated Crop Management Conf. Proceedings. Dec. 5-6, 2001, Ames, IA. Iowa State Univ. Extension. (pdf)
• Mallarino, A.P., and D. Wittry. 2000. How can we make intensive soil sampling and variable-rate P and K fertilization cost-effective? p. 203-210. In The Integrated Crop Management Conf. Proceedings. Nov. 29-30, 2000. Ames, IA. Iowa State Univ. Extension. (pdf)
• Mallarino, A.P., and D.J. Wittry. 2000. Identifying cost-effective soil sampling schemes for variable-rate fertilization and liming. In P.C. Robert et al. (ed.). Fifth Intl. Conf. on Site-Specific Management for Agricultural Systems. Proceedings. CD-ROM. July16-19. Bloomington, MN. ASA, CSSA, SSSA, Madison, WI. (pdf)
• Mallarino, A.P. 1999. Soil phosphorus testing for crop production and environmental purposes? p. 185-192. In The Integrated Crop Management Conference. Proceedings. Dec. 1-2, 1999. Iowa State Univ. Extension. Ames. (pdf)
• Sawyer, J.E., and A.P. Mallarino. 1999. Differentiating and understanding the Mehlich 3, Bray, and Olsen soil phosphorus tests. Presented at the 19th Annual Crop Pest Management Short Course, Univ. of Minnesota, Nov. 22, 1999. St. Paul, MN. (pdf)
• Mallarino, A.P., and D. Wittry. 1999. Challenges for making intensive soil sampling and variable-rate technology pay. p.104-109. In North Central Extension-Industry Soil Fertility Conference. Proceedings. Vol. 15. St. Louis, MO. (pdf)
• Atia, A. and A.P. Mallarino. 1999. Soil testing for phosphorus in manured soils. In Manure Management '99. Proceedings. June 22-25, 1999. Saskatoon, SK, Canada.
• Mallarino, A.P. 1999. Extracting phosphorus in calcareous soils with the Mehlich III. p. 7. In The soil plant analyst. Soil and Plant Analysis Council, Summer, 1999.
• Mallarino, A.P. 1998. The Olsen, Bray-1, and Mehlich-3 P tests: Correlations and field calibration for corn in Iowa soils. Special Workshop. Oct. 18, 1998. ASA Annual Meetings. Baltimore, MD.
• Mallarino, A.P. 1998. Soil test interpretations of Mehlich-3 P and K for corn. Soil and Plant Analyst Workshop. Proceedings. Nov. 10-11, 1998. St. Louis, MO.
• 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.
• Mallarino, A.P., and D. Wittry. 1997. Use of DGPS, yield monitors, soil testing, and variable rate technology to improve phosphorus and potassium management. p. 267-275. In The Integrated Crop Management Conference. Proceedings. Nov. 17-18, 1997. Iowa State Univ. Extension. Ames.
• Mallarino, A.P. 1995. Comparison of Mehlich-3, Olsen, and Bray-P1 procedures for phosphorus in calcareous soils. p. 96-101. In G. Rehm (ed.) North Central extension-industry soil fertility conference. Proceedings. Vol. 11. St. Louis, MO.
• 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

• Barbagelata, P.A., and A.P. Mallarino. 2004. On-farm research methods for soil test potassium calibration using precision agriculture technologies. Agron. Abs. CD-ROM. ASA-CSSA-SSSA. Madison, WI.
• Mallarino, A.P., J. Sawchik and and D.J. Wittry. 2003. Comparing zone sampling approaches with crop response to phosphorus and potassium fertilization. Agron. Abs. CD-ROM. ASA-CSSA-SSSA. Madison, WI.
• Bermudez, M., A.P. Mallarino, and D.J. Wittry. 2002. Grain yield and soil-test spatial variability under uniform or variable-rate phosphorus and potassium fertilization. Agron. Abs. CD-ROM. ASA-CSSA-SSSA, Madison, WI.
• Sawchik, J., A.P. Mallarino, M. Bermudez, and D.J. Wittry. 2002. Relating soil tests and within-field yield response to phosphorus and potassium using various sampling strategies. Agron. Abs. CD-ROM. ASA-CSSA-SSSA, Madison, WI.
• Wittry, D.J., A.P. Mallarino, and P. Barbagelata. 2002. Ammonium acetate, Mehlich-3, and sodium tetraphenyl-boron soil potassium tests for corn and soybean. Agron. Abs. CD-ROM. ASA-CSSA-SSSA, Madison, WI.
• Mallarino, A.P., and J.A. Lamb. 2000. The evolution of precision soil sampling systems in the upper Midwest. p. 363. In Agronomy Abstracts, ASA, Madison, WI.
• Klatt, J.G., and A.P. Mallarino. 2000. Soil P testing in manured soils in relation to P loss to water supplies. p. 367. In Agronomy Abstracts, ASA, Madison, WI.
• Wittry, D.J. and A.P. Mallarino. 2000. Comparison of within-sampling unit and between-unit soil test variability for different soil sampling schemes. p. 366. In Agronomy Abstracts, ASA, Madison, WI.
• Mallarino, A.P. 1999. Routine and bioavailable soil phosphorus testing for agronomic recommendations. p. 319. In Agronomy Abstracts, ASA, Madison, WI.
• Wittry, D., and A.P. Mallarino. 1999. Impact of the soil sampling scheme on estimates of within field soil test variability. p. 320. In Agronomy Abstracts, ASA, Madison, WI.

Presentations

• Differentiating and understanding the Mehlich 3, Bray, and Olsen soil phosphorus tests, 1999 Univ. Minnesota Crop Pest Management Short Course (pdf)

Links

• ISU Soil and Plant Analysis Lab
• ISU Research and Demonstration Farms Annual Progress Reports
• Iowa Department of Agriculture and Land Stewardship
  • Feed and Fertilizer Bureau
  • Iowa Soil Testing Laboratory Certification Program
• PM 1098A Forage Testing Laboratories (pdf)
• NCR-13 Committee: Soil Testing and Plant Analysis

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