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

This Article Abstract 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 Al-Kaisi, M. Articles by Licht, M. A. Search for Related Content PubMed Articles by Al-Kaisi, M. Articles by Licht, M. A. Agricola Articles by Al-Kaisi, M. Articles by Licht, M. A. Related Collections Water Quality Crop Rotation Systems Nitrogen Other Soil Management Tillage

Effect of Strip Tillage on Corn Nitrogen Uptake and Residual Soil Nitrate Accumulation Compared with No-Tillage and Chisel Plow

Dep. of Agron., Iowa State Univ., Ames, IA 50011-1010

View larger version (16K): [in a new window]   Fig. 1. Residual soil NO3–N content at different soil depths in the root zone after 2 yr (NO3–N kg ha–1 was estimated as a difference between year 2002 and 2000 soil NO3–N content at different soil depths) for the Ames and Nashua sites. The least significant differences are according to unprotected Fisher's LSD(0.05) test. FST-FF, fall strip tillage with fall N fertilizer application; FST-SF, fall strip tillage with spring N fertilizer application; SST-SF, spring strip tillage with spring N fertilizer application; FCP-FF, fall chisel plow with fall N fertilizer application; NT-FF, no-tillage with fall N fertilizer application.

View larger version (32K): [in a new window]   Fig. 2. After harvest, soil NO3–N distribution profile of different tillage systems and timing of N application during 2000 (before treatment application), 2001, and 2002 (after treatments application) for Ames and Nashua sites. The least significant differences are according to unprotected Fisher's LSD(0.05) test. FST-FF, fall strip tillage with fall N fertilizer application; FST-SF, fall strip tillage with spring N fertilizer application; SST-SF, spring strip tillage with spring N fertilizer application; FCP-FF, fall chisel plow with fall N fertilizer application; NT-FF, no-tillage with fall N fertilizer application.

View larger version (32K): [in a new window]   Fig. 3. Precipitation and water NO3–N concentration of leachate collected at 1.2-m soil depth in lysimeters after rainfall events for the Ames and Nashua sites in 2001 and 2002. The least significant differences are according to unprotected Fisher's LSD(0.05) test. FST-FF, fall strip tillage with fall N fertilizer application; FST-SF, fall strip tillage with spring N fertilizer application; SST-SF, spring strip tillage with spring N fertilizer application; FCP-FF, fall chisel plow with fall N fertilizer application; NT-FF, no-tillage with fall N fertilizer application.

View larger version (29K): [in a new window]   Fig. 4. Overall average of water NO3–N concentration leachate collected after many rainfall events during the growing season at a 1.2-m soil depth lysimeters for the Ames and Nashua sites in 2001 and 2002. The mean separations are based on least significant differences according to unprotected Fisher's LSD(0.05) test. FST-FF, fall strip tillage with fall N fertilizer application; FST-SF, fall strip tillage with spring N fertilizer application; SST-SF, spring strip tillage with spring N fertilizer application; FCP-FF, fall chisel plow with fall N fertilizer application; NT-FF, no-tillage with fall N fertilizer application.