|BORTOLON, LEANDRO - University Of Rio Grande Do Sul|
|GIANELLO, CLESIO - University Of Rio Grande Do Sul|
Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 11/1/2009
Publication Date: 11/1/2009
Citation: Bortolon, L., Kovar, J.L., Cambardella, C.A., Singer, J.W., Gianello, C. 2009. Inorganic and Organic Phosphorus in Soil Affected by Compost, Tillage and Cropping System [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 1-5, 2009, Pittsburgh, PA. Paper No. 352-11.
Technical Abstract: Excessive fertilization with organic or inorganic phosphorus (P) amendments increases the potential risk of P losses to surface waters. An understanding of the P fractions in soil is essential for proper management of fertilizer amendments. The objective of this study was to evaluate the distribution of organic and inorganic P forms in soil as affected by compost amendments, tillage, and cropping system. Soil samples were collected from the surface (0-7.5 cm) layer of plots under a corn-soybean-wheat/clover rotation, with or without fall compost application, and managed with moldboard plow, chisel plow, or no-tillage since 1988. Seven fractions of organic P and four fractions of inorganic P were separated from subsamples of Clarion silt loam and Canisteo silty clay loam. The results will be discussed.