Agronomy Journal Journal of Natural Resources and Life Sciences Education
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published online 1 January 1973
Published in Agron J 65:69-71 (1973)
© 1973 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Ketcheson, J. W.
Right arrow Articles by Onderdonk, J. J.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Ketcheson, J. W.
Right arrow Articles by Onderdonk, J. J.
Agricola
Right arrow Articles by Ketcheson, J. W.
Right arrow Articles by Onderdonk, J. J.

Effect of Corn Stover on Phosphorus in Run-off From Nontilled Soil1

J. W. Ketcheson and J. J. Onderdonk2

Cultural practices can modify losses of soil and nutrients from cropland, but little quantitative information is available on the extent. In this study the effect of stover on soil and phosphorus (P) removal was determined for well-drained till soil (Guelph loam) with 7% slope. Corn (Zea mays L.) was planted without tillage after 32P-tagged P fertilizer was applied broadcast and covered with a corn stover mulch in one treatment or left bare in a second treatment. Run-off was collected and analysed from one simulated and from two natural rainfall events.

Stover reduced soil P in run-off by 65% and fertilizer P by 97%. These reductions were achieved by a decrease in total run-off and by a decrease in the concentration of suspended soil in it. Of the 29 kg of fertilizer P applied per ha, 3.85 kg (13%) and 0.13 kg (<1%) were removed over all run-off events from the no stover and stover treatments, respectively. This corresponded to 8.5 and 1.3%, respectively, of the total P removal, which varied from 45 kg/ha without stover to 10 kg/ha with stover. The liquid fraction of the run-off carried the least amounts of either soil or fertilizer P. Proportionately more fertilizer P was found in the coarse (>50µ) soil than in the fine fraction (<50µ), whereas proportionately more soil P was found in the latter than in the former, suggesting that fertilizer P is preferentially associated with the coarse fraction.

Key Words: Soil erosion • Residues • Soil management • Pollution control • Crapping practices

1 Contribution front Department of Land Resource Science, University of Guelph, Guelph, Canada. Supported by Canada Depart~nent of Agriculture Grant No. 1045. Radioactively labelled phosphorus fertilizer was prepared by Tennessee Valley Authority.

2 Associate Professor and Graduate Research Assistant, respectively.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Crop Science Vadose Zone Journal
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1973 by the American Society of Agronomy.