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This article in CM

  1. Vol. 5 No. 1
     
    Accepted: Apr 13, 2006


    * Corresponding author(s): stephen.machado@oregonstate.edu
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doi:10.1094/CM-2006-0717-01-RS

Demarcating Management Zones for Site-Specific Farming Using Electromagnetic Induction and Yield Maps in Eastern Oregon

  1. Stephen Machado *a
  1. a Columbia Basin Agricultural Center (CBARC), P.O. Box 370, Oregon State University, Pendleton 97801

Abstract

Traditional farming practices in eastern Oregon ignore the inherent spatial variability (topography, soils) resulting in inefficient farming and lower net returns. Site-specific farming (SSF), or farming based on requirements of specific areas in a field, has the potential to improve input use efficiency and farm profits. To implement SSF, however, management zones should be demarcated preferably based on factors that most affect yield. The most common method for demarcating management zones is through intensive grid sampling that can be very expensive. The objective of this study was to find cheaper and quicker ways to demarcate management zones in a field in eastern Oregon. This study evaluated the use of electrical conductivity (EC) and yield maps in demarcating management zones. A 28-acre field was characterized for depth and nutrients at a 100-ft grid. Wheat was uniformly seeded throughout the field and harvested at each grid location. Results indicated that the spatial variability of wheat yield was influenced by soil depth. EC data were correlated with both depth and grain yield and can therefore be used to demarcate management zones quicker and cheaper than grid sampling in this field. Information from yield maps was also useful in demarcating management zones for SSF.

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