Article: An evaluation of soil survey crop yield interpretations for two central Iowa farms.

ABSTRACT: This study was conducted on four adjacent 16-ha (40-ac) fields within the Clarion-Nicollet-Webster soil association to (1) determine if crop yield interpretations derived from 1:15840 soil survey maps could be used for developing field-scale management plans; and (2) to determine if soils in adjacent fields were sufficiently similar to not confound farming system comparisons. Expected crop yields were derived using a computer-based Soil Information System (SIS) and compared with measured yields. Soil map units in all four field were taxonomically variable, but this did not affect expected crop yields. Average expected and measured corn and soybean yields agreed ...

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