Managing Crop Residue with Green Manure, Urea, and Tillage in a Rice–Wheat Rotation
Milkha S. Aulakha,
T.S. Kherab,
John W. Doranc and
Kevin F. Bronsond
a Soil and Water Sciences Div., International Rice Research Inst. (IRRI), P.O. Box 3127, MCPO, 1271 Makati City, Philippines
b Dep. of Soils, Punjab Agricultural Univ., Ludhiana 141004, Punjab, India
c USDA-ARS, East Campus, Univ. of Nebraska, Lincoln, NE 68583
d Texas A&M Univ., Texas Agricultural Experiment Station, RR 3, Box 219, Lubbock, TX 79401
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Fig. 1. Mineral N in soil (0 to 15 cm) during pre-rice fallow and rice growing season of 1995 as affected by incorporating wheat residue and fertilizer N (a) without green manure and (b) with green manure. Time of wheat residue (WR) incorporation. Time of green manure (GM) incorporation and flooding. Time of fertilizer N (FN) application. All treatments had no rice residue and 120 kg FN ha-1 in the wheat seasons. Bars represent SE, shown in only one direction for clarity
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Fig. 2. Mineral N in soil (0 to 15 cm) during post-rice fallow and wheat growing season of 1996 to 1997 as affected by incorporating rice residue, fertilizer N, and residual green manure. Time of rice residue (RR) incorporation. Time of fertilizer N (FN) application. Bars represent SE, shown in only one direction for clarity
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Copyright © 2001 by the Soil Science Society of America.
