Farming Soils, Not Fields: A Strategy for Increasing Fertilizer Profitability

(...) This study was conducted to (i) measure crop yield differences between contrasting soils within fields, and (ii) compare the economics of «farming soils, not fields,» where contrasting soils in a field receive different vs. uniform rates and formulations of fertilizer. Crop yield variability studies were conducted along 1600 ft transects across several soil units in each of four fields during 1987 (...)