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- W2093060968 abstract "One reason for the slow implementation of conservation tillage methods on the nation's farms is the perception that results from plot-level research at the agricultural experiment stations—presently the primary information source for interpreting the relative crop yield potential of alternative tillage systems—may not be representative. In this study, data for corn (Zea mays L.) production from 78 sites in Wabash County, Indiana, were obtained from cooperating farmers as part of their normal farming operations during 1983. The data were analyzed with simulation models, regression techniques, and partial budgeting. The average farm corn yields, and hence net returns, observed from different tillage systems appeared to be significantly different, corn on ridge-till sites yielding substantially more than corn on conventional and no-till sites. After differences among sites in precipitation and soil characteristics—expressed as a single moisture stress variable—and applied N and P fertilizers were taken into account, however, there were few yield differences among tillage systems, reconciling the farm findings with those from universities. The moisture stress variable (S) was the sum of 90 daily ratios of actual-to-potential evapotranspiration, from 39 d before corn silking to SO d after. The study also provided empirical evidence that, as moisture stress increased, net returns to those corn producers using no-till systems increased over those obtained for other tillage systems. Although the extensive data gathering was done in only 1 yr, that year (1983) provided as much range in the moisture stress variable (S=15 to 45) and final corn yields (7 to 160 bu/acre among sites) as might be expected from a single soil plot over 10 or more years in Indiana. Therefore, the results are believed to provide a representative view of the yield-moisture stress relationships, especially at the high moisture stress end." @default.
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- W2093060968 date "1991-04-01" @default.
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- W2093060968 title "Comparison of Net Returns under Alternative Tillage Systems Considering Spatial Weather Variability" @default.
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- W2093060968 doi "https://doi.org/10.2134/jpa1991.0166" @default.
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