soils, soil fertility, clay soils, loam, sand, organic matter, potash, phosphorus, nitrogen in soils
The soil is our most valuable natural resource. Under proper management the soil will last indefinitely, because its fertility and productivity will not only be maintained but may actually be increased. Changes in the soil due to crop ping which affect fertility and productivity are gradual processes. These are the cumulative effects of crop ping on the soil: (1) Depletion of soil organic matter (2) Deterioration of soil structure or tilth (3) Appearance of nitrogen and phosphorus deficiencies in crops (4) Increased tendency of the soil to erode by wind and water (5) Failure of crop s to grow and mature properly. This bulletin, with its suggested management and maintenance practices, hopes to help the South Dakota farmer counteract these disastrous effects of cropping.
South Dakota State College of Agriculture and Mechanic Arts, Agricultural Experiment Station
Puhr, L. F. and Worzella, W. W., "Fertility Maintenance and Management of South Dakota Soils" (1952). Agricultural Experiment Station Circulars. 89.