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ARS Home » Midwest Area » Columbia, Missouri » Cropping Systems and Water Quality Research » Research » Publications at this Location » Publication #155408
Title: INTEGRATING SOIL PROPERTIES AND CROP PRODUCTIVITY IN THE DEVELOPMENT OF NUTRIENT MANAGEMENT ZONES

Author
item CLAY, DAVID - S DAKOTA STATE UNIV
item CHANG, J - S DAKOTA STATE UNIV
item Kitchen, Newell
item CARLSON, GREGG - S DAKOTA STATE UNIV

Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 7/23/2003
Publication Date: 11/3/2003
Citation: CLAY, D., CHANG, J., KITCHEN, N.R., CARLSON, G. 2003. INTEGRATING SOIL PROPERTIES AND CROP PRODUCTIVITY IN THE DEVELOPMENT OF NUTRIENT MANAGEMENT ZONES [abstract] [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts.

Interpretive Summary:

Technical Abstract: Standardized techniques for identifying and evaluating the effectiveness of management zones are not available. The objective of this study was to determine the influence of different approaches to determine yield goals and management zones on N and P fertilizer recommendations. This study used soil nutrient and yield information collected from two east central South Dakota fields between 1995 and 2000. The crop rotation was corn (Zea mays L.) followed by soybean (Glycine max L). Several different approaches for identifying management zones and N and P fertilizer recommendations were evaluated. The 4-ha grid-cell sampling approach combined with landscape specific yield goals generally had lower P and N fertilizer recommendation error and bias than the other methods tested. These results were attributed to fertilizer recommendations being influenced by both soil nutrient and yield variability. In these fields, prior management had a large influence on nutrient variability, while yield variability was influenced by drainage and water availability. Different results are likely in fields that are less impacted by prior management.