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Yield and Phosphorus Content of Canning Peas as Affected by Fertilization, Irrigation Regime, and Sodium Bicarbonate-Soluble Soil Phosphorus¹

ABSTRACT

Yield of both pea vines and canning peas were increased significantly by phosphorus fertilizers. Yield response was in the order: current season applied phosphorus > 1 year residual > 2 year residual. Yield of pea vines and canning peas were increased significantly for increases in water application in the order: 5 inches < 8 inches < 10 inches > 12 inches.

Time of sampling pea vines for chemical analysis was shown to be an important factor if it is desired to relate yields to the soluble phosphorus content of plant tissue, or soluble phosphorus content of plant tissue with irrigation regime.

Relationships between sodium bicarbonate-soluble phosphorus and phosphorus in the plant and between yield of peas and phosphorus content of plant tissue are shown.

¹ Research supported by Regional Project W-29 with eleven Western States, Hawaii, and Soil and Water Conservation Research Branch, A.R.S., U.S.D.A. cooperating.

² Soil Scientists and Chemist, respectively, Soil and Water Conservation Research Branch, A.R.S., U.S.D.A., Logan, Utah.

Received for publication November 21, 1955. Accepted for publication March 22, 1956.