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

This Article Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (4) Citing Articles via Google Scholar Google Scholar Articles by Zhu, Y. Articles by Fox, R. H. Search for Related Content PubMed Articles by Zhu, Y. Articles by Fox, R. H. Agricola Articles by Zhu, Y. Articles by Fox, R. H. Related Collections Water Quality Nutrients Best Management Practices Crop Rotation Systems Nitrogen

NITROGEN MANAGEMENT

Corn–Soybean Rotation Effects on Nitrate Leaching

Dep. of Crop and Soil Sci., 116 A.S.I. Bldg., The Pennsylvania State Univ., University Park, PA 16802

^* Corresponding author (yxz117{at}psu.edu)

Received for publication November 8, 2002. Because agricultural production is a primary nonpoint source of NO^-₃ in the nation's waters, a better understanding of the effects of cropping systems on NO^-₃ leaching is required for developing agricultural production practices that reduce NO^-₃ leaching. A 4-yr experiment was conducted to study the effect of a corn (Zea mays L.)–soybean [Glycine max (L.) Merr.] rotation on NO^-₃ leaching using passive capillary fiberglass wick lysimeters. The experiment had five N rates on corn (0–200 kg N ha^-1 in 50-kg increments). Corn was planted in 1997 and 1999, and soybean was planted in 1998 and 2000. The increase of soil residual NO^-₃–N concentrations in the surface 25 cm of soil after crop harvest was not significant (p = 0.05) when N fertilizer rates applied to corn increased from 0 to 100 kg ha^-1 but was significant when N rate increased from 100 to 200 kg ha^-1 in the corn years. The 2-yr average soil residual NO^-₃–N concentrations and annual flow-weighted NO^-₃–N concentrations in leachate were significantly higher (p = 0.05) in soybean years than in corn years at 0 and 100 kg N ha^-1 applied to corn, but the differences at the 200 kg N ha^-1 rate were not significant. The results indicate that at recommended N rates applied to corn in a corn–soybean rotation, NO^-₃ leaching potential is similar for corn and soybean, but at less than 100 kg N ha^-1 rate, a greater NO^-₃ leaching potential exists under soybean than under corn.

This article has been cited by other articles:

				X. Q. Liang, H. Li, M. M. He, Y. X. Chen, G. M. Tian, and S. Y. Xu The Ecologically Optimum Application of Nitrogen in Wheat Season of Rice Wheat Cropping System Agron. J., January 11, 2008; 100(1): 67 - 72. [Abstract] [Full Text] [PDF]

				C. D. Nance, L. R. Gibson, and D. L. Karlen Soil Profile Nitrate Response to Nitrogen Fertilization of Winter Triticale Soil Sci. Soc. Am. J., June 29, 2007; 71(4): 1343 - 1351. [Abstract] [Full Text] [PDF]

				U. M. Sainju, B. P. Singh, W. F. Whitehead, and S. Wang Accumulation and Crop Uptake of Soil Mineral Nitrogen as Influenced by Tillage, Cover Crops, and Nitrogen Fertilization Agron. J., April 4, 2007; 99(3): 682 - 691. [Abstract] [Full Text] [PDF]