Aggregation of the Silt and Clay Soil Separates in Relation to Yields and Runoff on Coastal Plain Soils

Effects of Land Resting on Conservation and Productivity of Vegetable‐growing Soils1

“…The relationship of extent of microaggregation to both runoff and crop yield has been shown for this soil ( 12). Aggregation values at the beginning and end of the period of cultivation in this study are shown in table 2.…”

“…The dynamic character of soil physical conditions has been emphasized (2,3,9). The relationship of good physical conditions in the soil to crop yield (8, 12,13,16) and to effective control of runoff and erosion ( 10,12,15) has been pointed out. In previous reports of results from studies on controlled plots (7,12) we have shown the benefits of crop rotation and organic matter additions on soil physical conditions, control of runoff and erosion, and improvement of truck crop yields.…”

“…The relationship of good physical conditions in the soil to crop yield (8, 12,13,16) and to effective control of runoff and erosion ( 10,12,15) has been pointed out. In previous reports of results from studies on controlled plots (7,12) we have shown the benefits of crop rotation and organic matter additions on soil physical conditions, control of runoff and erosion, and improvement of truck crop yields. Results from studies here and elsewhere (8, 11) have indicated that the soil management and organic matter maintenance practices most favorable for efficient crop production and those most favorable for conservation of soil and .water are similar in most respects.…”

“…In the one exception the reversal of each of these trends seems to indicate failure in selection of a comparable field area for the test. Improvement in the soil physical properties listed above has been shown to be related to reductions in runoff and erosion (10,12,15). A practical and effective method for maintaining favorable physical conditions in these sandy soils is through some form of land resting as defined above.…”

Seasonal Occurrence of Runoff and Erosion from a Sandy Soil in Vegetable Production1

“…The fact that winter cover crops are equally effective or even more effective in reducing soil losses during subsequent cultivation periods is not so well recognized. This results from the beneficial effects of the cover crop on physical properties of the soil (11 ). The average annual winter soil loss from plots with a cover crop was 120 pounds per acre while from plots without cover crops pounds per acre annually.…”