HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Campbell, R. E. Search for Related Content PubMed Articles by Campbell, R. E. Agricola Articles by Campbell, R. E.

Phosphorus Fertilizer Residual Effects on Irrigated Crops in Rotation¹

ABSTRACT

Residual effects for 8 years of 0, 26, 52, 105, and 210 lb of P per acre applied for barley were measured in a 6-year rotation of barley, alfalfa (3 years), corn, and sugar beets grown on Thurlow clay loam. Amounts of P removed by crops in 9 years totaled 96, 109, 124, 136, and 179 lb, respectively. Corresponding recoveries of applied P were 49, 54, 38, and 40%. Most of the 26 pounds of P was used in 4 years. Residual response over the entire period increased with higher rates.

Residual P soluble in NaHCO₃ decreased with continued crop removal of applied P.

The results of this experiment which was located in Montana agreed well with similar experiments run concurrently in New Mexico, Oregon, and South Dakota. The differences among them can be reconciled on the basis of soil textural differences as they affect P adsorption and availability.

¹ Contribution from SWCRD, ARS, USDA, in cooperation with the Montana Agr. Exp. Sta., Huntley, Mont. Submitted as J. Paper No. 647 of the Montana Agr. Exp. Sta.

² Soil Scientist, USDA, Huntley, Montana. The author acknowledges the assistance and cooperation of Drs. W. E. Larson, T. J. Army, and P. L. Brown in conducting the field and laboratory phases of this experiment and in preparing the manuscript for publication.

Received for publication June 8, 1964. Accepted for publication September 25, 1964.