Nitrogen requirements associated with improved conservation tillage for corn production
- 1 January 1981
- journal article
- research article
- Published by Taylor & Francis in Communications in Soil Science and Plant Analysis
- Vol. 12 (11), 1133-1149
- https://doi.org/10.1080/00103628109367224
Abstract
Excessive soil erosion and use of N fertilizer are costly to the Atlantic Coastal Plain corn (Z. mays L., ''Funks G 4507'') producer and both may serve to create environmental hazards. An in-row chisel (36 cm deep) tillage method was compared with the standard 5 cm fluted coulter method for planting corn in premature wheat (Triticum aestivum L.) residues grown on an Organeburg sandy loam (Typic Paleudult). Five orthogonal N levels ranging up to 440 kg of N/ha were used to determine an economic N optimum for each tillage method. The in-row chisel tillage method provides a possible yield advantage in the Atlantic Coastal Plain because of observed restricting soil layers within the normal corn rooting zone. The estimated profit-maximizing quantities of N fertilizer were 262 and 295 kg of N/ha (234 and 263 lb of N/acre) for the fluted coulter and in-row tillage procedures, respectively. Corn grain yields associated with these inputs were 9.6 .times. 103 and 12.6 .times. 103 kg/ha (153 and 200 bu/acre), respectively. The yield increase associated with in-row chiseling through a 2.5 metric ton mulched surface is attributed to potentially improved rooting and more efficient water storage and use.This publication has 10 references indexed in Scilit:
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