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Full-Text Articles in Physical Sciences and Mathematics
Effectiveness Of Surface Application Of Phosphorus And Potassium On Yield Of No-Till Corn Grown On Soils Testing Low Or Medium Below A Depth Of 3 Inches, Grant W. Thomas
Effectiveness Of Surface Application Of Phosphorus And Potassium On Yield Of No-Till Corn Grown On Soils Testing Low Or Medium Below A Depth Of 3 Inches, Grant W. Thomas
Soil Science News and Views
When crops are grown continuously under no-tillage or very minimum tillage, there is a tendency for phosphorus (P) and potassium (K) to become concentrated at or near the soil surface. This occurs when P and K fertilizers are broadcast on the surface and not mixed with the soil as would occur with plowing. The result is a stratification of P and K such that the surface few inches become very high in those nutrients, but soil test levels remain largely unaffected below that. The question is whether high yields of no-till crops can be obtained under these conditions.
The Effect Of Fall And Spring Tillage Of A Compacted Soil On Corn And Tobacco Yields, Kenneth L. Wells, Roy V. Catlett
The Effect Of Fall And Spring Tillage Of A Compacted Soil On Corn And Tobacco Yields, Kenneth L. Wells, Roy V. Catlett
Soil Science News and Views
Soil compaction is being diagnosed in increasing instances as the cause of poor crop performance in Kentucky. While the basic causes of compaction can usually be identified, it is much more difficult to prescribe techniques to solve the problem. Following identification of compacted soil as being the cause of poor corn growth in a field in Shelby County, Kentucky, a study was conducted to compare three tillage tools on production of corn and tobacco. The compacted zone was within the top 6-inch layer of soil.
Movement Of Triazine Herbicides In Conventional, Reduced Tillage, And No-Tillage Corn Production, William W. Witt, K. W. Sander
Movement Of Triazine Herbicides In Conventional, Reduced Tillage, And No-Tillage Corn Production, William W. Witt, K. W. Sander
Soil Science News and Views
Herbicides are applied to over 90 percent of the corn acreage in Kentucky and triazine herbicides are used the most. Conservation tillage methods are often used to prevent soil erosion and to conserve soil water. However, as tillage is decreased the dependence on herbicides for weed control often increases. Minimizing herbicide movement from the application sites to non-target areas, such as ground and surface waters, is necessary to maintain optimum water quality.