My Account: Log In | Join | Renew
Search
Author
Title
Vol.
Issue
Year
1st Page

Abstract

 

This article in SSSAJ

  1. Vol. 27 No. 1, p. 65-68
     
    Received: Mar 19, 1962
    Published: Jan, 1963


 View
 Download
 Alerts
 Permissions
 Share

doi:10.2136/sssaj1963.03615995002700010024x

Residual Effects of Phosphorus Fertilizer in an Irrigated Rotation in the Southwest1

  1. Ross W. Leamer2

Abstract

Abstract

Response to phosphorus fertilizer on a phosphorus-deficient Reddish-Brown soil was measured through 8 years. Yields, percent P in plant, and NaHCO3-extractable soil P were followed through 2 cycles of alfalfa and 2 intervening crops of sorghum. Increased yields were obtained until P equal to the application was removed in harvested crops. Alfalfa yields were closely correlated with both percent P in hay and NaHCO3-extractable soil P during the first 4 years. High yields were maintained in the second cycle of the rotation, but percent P in hay and NaHCO3-extractable soil P were at levels associated with low yields during the first cycle. Sorghum following alfalfa was not affected by N fertilizer. Second-year sorghum benefited from N only where there was ample P.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © . Soil Science Society of America