Productivity of Soils in the North Central Region of the United States
Productivity of Soils in the North Central Region of the United States
Macleane, Douglas, 1856-
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Evaluation of Weather Factors in the Production of Wheat. Jour. Soil and Water Cons. 17:149-156. 1962. 1965] PRODUCTIVITY OF NORTH CENTRAL SOILS 11 1963. Crop yield estimates in Table 3 will need to be revised periodically to reflect the results of improving crop and soil technology. Woodland yield estimates in Table 3 are less exact than those given for agronomic crops because trees grow slowly and fewer tree-growth and production measurements have been made than for agronomic and horticultura...l crops. Site conditions such as slope aspect and condition of existing trees can cause yields for localized areas to be considerably higher or lower than the estimates listed for any given soil. ADJUSTING CROP YIELD ESTIMATES FOR DIFFERENT SOIL, CLIMATE, AND MANAGEMENT SITUATIONS The yield estimates presented in Table 3 are for specific kinds of soil and management levels. They should serve as benchmarks for pre- dicting yields of other soils under various management conditions. Crop yield adjustments can also be made for different soil type-slope-erosion, climate, and management conditions within a soil series.
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