The Effect of Various Rates and Frequencies of Application of Rock and Superphosphate on the Yield and Composition of Forage on a Lake Charles Clay Loam Soil1
- R. L. Cheaney,
- Ralph M. Weihing and
- R. Norton Ford2
The effects of various rates and frequencies of application of rock and superphosphate on the yield and chemical composition of pasture forage was studied on a Lake Charles clay loam soil. The amount of P2O5 in pounds per acre from each source and the frequency of fall application of this amount were: 30 lbs. every year, 60 lbs. every 2 years, 120 lbs. every 4 years, 240 lbs. every 8 years, and 480 lbs. every 16 years. The area was seeded to a pasture mixture of Dallisgrass and white, Persian, and hop clovers. Yield and chemical data are reported for the first 4 years, 1950–53. At the end of the fourth year, 4 yearly 30-pound applications and two 60-pound applications of P2O5 from superphosphate had equalled and surpassed the production from single applications of 120 and 240 pounds of P2O5 from the same source. There appeared to be a similar trend with rock phosphate; however, the yearly 30-pound application has not proven very effective to date.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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