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 HighWire Citing Articles via Google Scholar Google Scholar Articles by Day, L. D. Articles by Washer, N. E. Search for Related Content PubMed Articles by Day, L. D. Articles by Washer, N. E. Agricola Articles by Day, L. D. Articles by Washer, N. E.

Landscape Position and Particle-size Effects on Soil Phosphorus Distributions¹

ABSTRACT

The objectives of this study were to investigate the effects of pedogenesis and landscape position on (i) the association of total P with particle-size content and with various particle-size separates, (ii) relative abundance of different forms of P, and (iii) P distributions between horizons and soils representing five landscape positions on an Ultisol hillslope in northwest Florida. Total-P content in soil seemed to be directly associated with the amount of clay in the lower landscape positions. This association may be the result of the activity of the mineralogy dominant in the clay fraction. Total P in the clay and P-fraction values indicated that some P had been redistributed between horizons and possibly between soils on the landscape. Coarser sands commonly had more total P than finer sand fractions. The sand fractions were composed primarily of quartz and ironstone. The amount of ironstone in the sand fraction was probably responsible for the amount of total P. Among P fractions, a large portion of P was in the residual form, especially in lower horizons, implying that the soils are intensely weathered or developed from parent materials that contained considerable residual-P, which was occluded in sesquioxides prior to deposition of the sediments. The P forms were present in the order of decreasing abundance as residual-P, Fe-P, Al-P, and Ca-P. Water-soluble P was not detected in any of the soils.

¹ Florida Agric. Exp. Stn. Journal Series no. 7907. Research supported by the Soil Genesis and Characterization Program. Institute of Food and Agricultural Sciences, Univ. of Florida. Gainesville, FL 32611.

² Graduate Assistant, Associate Professor, and Graduate Assistant. Soil Science Dep., G-159 McCarty Hall, Univ. of Florida, Gainesville, FL 32611. Senior author's present title and address are Soil Scientist, USDA-SCS 129 North St., Walton, NY 13856.

Received for publication January 28, 1987.

This article has been cited by other articles:

				M. K. Zhang, Z. L. He, D. V. Calvert, P. J. Stoffella, X. E. Yang, and Y. C. Li Phosphorus and Heavy Metal Attachment and Release in Sandy Soil Aggregate Fractions Soil Sci. Soc. Am. J., July 1, 2003; 67(4): 1158 - 1167. [Abstract] [Full Text] [PDF]

				A. N. Kravchenko and D. G. Bullock Correlation of Corn and Soybean Grain Yield with Topography and Soil Properties Agron. J., January 1, 2000; 92(1): 75 - 83. [Abstract] [Full Text]