Effect of Seeding, Rate, Fall Disking, and Nitrogen Level on Stand Establishment of Crimson Clover in a Grass Sod1
- W. E. Knight2
Five rates of unhulled crimson clover seed were overseeded in a 'Coastal' bermudagrass sod in June to simulate natural reseeding. Satisfactory volunteer stands and yields of crimson clover were produced for 3 years in a Coastal bermudagrass sod when the quantity of seed shattered in the spring was 40 pounds or more per acre. As the clover seeding rate increased from 5 to 80 pounds per acre, the yield of clover increased as well as the yield of grass following the clover. Annually fall-seeded clover at the rate of 30 pounds per acre was equivalent to the 80 pound simulated reseeding rate.
Under the conditions of this test, fall disking caused highly significant reductions in clover yield with a greater reduction on a percentage basis at the lower seeding rates. The average reduction in clover yield from disking was 760 pounds of dry matter per acre over the 3-year period. The average effect of fall disking on grass yields was negative but not significant.
Nitrogen reduced both stands and subsequent yields of the clover component; however, the average nitrogen effect was not significant. Highest total yield was produced by the 80-pound simulated reseeding rate of clover with grass fertilized with 200 pounds of N per acre without fall disking. Crimson clover increased total forage production by 27% when 200 pounds of N was applied to the grass and by 63% when no nitrogen was applied. The clover extended the grazing season 6 to 8 weeks and the additional forage was produced with minimum competitive effect between the grass and the clover.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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