Tuesday, November 6, 2007
223-2

Summary of Soil Fertility Status in Missouri by County, Soil Regions and Cropping Systems 1996-2006.

Manjula Nathan1, Yichang Sun1, Steven Abernathy1, and David Dunn2. (1) University of Missouri, 23 Mumford Hall, Columbia, MO 65211, (2) University of Missouri-Delta Center, 147 State Highway T, P O Box 160, Portageville, MO 63873

The soil fertility summary provides a valuable index of the soil fertility status of Missouri farmland by county, soil region, cropping systems, and identifies broad soil fertility trends in the state over years. The soil fertility summary also helps in evaluating fertilizer, lime, and manure management practices, in identifying areas that need additional soil fertility research, and in recognizing areas which pose potential threat to water quality. The soil fertility summary of over 220,000 agronomic crop soil samples analyzed by the University of Missouri Soil Testing labs for the period of 1996-2006 will be presented. Soil test summary for pHs, phosphorus and potassium based on cropping system, soil region, and county and statewide trends will be discussed. Higher percentage of adequately fertilized fields occurs in the intensively cropped Bootheel region. Alternatively, the highest percentage of low fertility soils occurs in the highly weathered Ozarks region. Soil fertility summary by cropping options clearly indicates that corn, soybeans and wheat fields are better managed than forage crops.

Back to Technologies for Nutrient Assessment and Efficient Utilization (includes Graduate Student Competition)
Back to S08 Nutrient Management & Soil & Plant Analysis

Back to The ASA-CSSA-SSSA International Annual Meetings (November 4-8, 2007)