Restoration of Soil Structure with Redtop and Other Sod Crops1
- Adam J. Wisniewski,
- Milton Salomon and
- John B. Smith2
Water-stable aggregates, soil organic matter, bulk densities, and soil moisture retention at 50-cm. tension were determined for a Bridgehampton silt loam following various treatments involving sod crops in rotation with potatoes and continous potatoes.
An overall positive correlation was found between organic matter and aggregation. Although plots that were in a redtop-potato rotation were significantly better aggregated than those in a red clover-potato rotation and plots in continous potatoes, increased aggregation was not always accompanied by an increase in total soil organic matter. This implied that the type of soil organic matter resulting from the decomposition of redtop is more effective in promoting water-stable aggregates than either the native organic matter or that resulting from the decomposition of other plant residues studied. Potato yields appear to be more a function of aggregation than of total soil organic matter. Some evidence exists that the decomposition of native organic matter has been hastened by the addition of redtop residues. A microscopic examination of aggregates > 5 mm. shows that roots are partly responsible for binding some of the smaller aggregates into larger ones.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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