GRAIN-SORGHUM RESPONSE TO SLIT-TILLAGE ON NORFOLK LOAMY SAND

被引:3
作者
KARLEN, DL
EDWARDS, JH
BUSSCHER, WJ
REEVES, DW
机构
来源
JOURNAL OF PRODUCTION AGRICULTURE | 1991年 / 4卷 / 01期
关键词
D O I
10.2134/jpa1991.0080
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Slit-tillage may provide a long-term, less energy-intensive method for disrupting dense, root-restrictive soil layers in many Atlantic and Gulf Coastal Plain soils. The objective of field research conducted during 1986, 1987, and 1988, was to evaluate effectiveness of slit-tillage for grain sorghum [Sorghum bicolor (L.) Moench] production on a Norfolk (fine-loamy, siliceous, thermic, Typic Paleudult) loamy sand near Florence, SC. Three-year average grain yields for slit-tillage, in-row subsoiling, and no-tillage were 50, 46, and 39 bu/acre, respectively. Soil pits excavated to a depth of 3 ft in 1988 showed plant roots in slits that had been formed in 1986, 1987, and 1988. Another experiment showed that tillage energy requirements for slit-tillage were lower than for conventional subsoil shanks. A two-row slit-tillage implement had a draft of 3930 lb and required 20.1 horsepower per row. Slit-tillage appears to be a viable practice for Coastal Plain soils because it forms very small, macropore-like openings through the restrictive layers that are readily filled with plant roots and thus remain open for more than 1 yr. No problems were identified for the technique suggesting that equipment manufacturers may want to consider further development of slit-tillage tools for Coastal Plain soils.
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页码:80 / 85
页数:6
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