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Yield and Chemical Composition of Ladino Clover as Affected by Fertilizer Treatments¹

Sypnosis: On a Bridgehampton fine sandy loam satisfactory stands of Ladino clover were maintained with a minimum application of 60 pounds P₂0₅ and 120 pounds K₂O per acre per year over a 4-year period. Large initial applications of phosphate were not as effective as similar amounts divided over 2 or 4 years. No accumulation of extractable phosphorus was found in the soil at any level of phosphate application. Removal of potassium by the crop approximately equalled the 120-pound K₂O application. Excessive plant uptake and soil accumulation of potassium resulted at 240 pounds K₂O per acre.

² Assistant Research Professor and formerly Assistant Research Professor of Agronomy (now at Rutgers University), Associate Research Professor and Assistant Research Professor of Agricultural Chemistry, respectively. The authors are indebted to Dr. R. R. Robinson, U. S. Regional Pasture Research Laboratory and Dr. Irene H. Stuckey for assistance in initiating this project.

Received for publication January 23, 1957.