The Influence of Phosphorus Fertilization and Moisture on Growth and Nutrient Absorption by Spring Wheat: I. Plant Growth, N Uptake, and Moisture Use
1961
Power, J. F. | Grunes, D. L. | Reichman, G. A.
The effects of stored soil moisture, seasonal precipitation, and P fertilization upon spring wheat growth were studied in a field experiment under controlled moisture conditions on a Chestnut soil in eastern Montana. Plant growth, grain yields, and nutrient uptake were proportional to available moisture and were increased by P fertilization. A uniform yield increase from P fertilization was measured under all moisture conditions on this relatively low P soil, with no interactions between moisture supplies and P fertilization. Phosphorus fertilization had no consistent effect upon total moisture use at any stage of growth. However, at soft dough and harvest, P fertilization increased the plant material produced per unit of moisture used. Correlation coefficients between plant growth or nutrient uptake and moisture use were extremely high as the crop approached maturity, for both fertilized and nonfertilized treatments.
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