Stinner, B.R. and Hoyt, G.D. and Todd, R.L. (1983) Changes in soil chemical properties following a 12-year fallow: a 2-year comparison of conventional tillage and no-tillage agroecosystems. Soil and Tillage Research, 3 (3). pp. 277-290.
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Abstract
Contents in soil of total N, exchangeable ammonium, soluble nitrate and extractable phosphate, potassium, calcium and magnesium were compared between conventional and no-tillage treatments on land which had been left fallow in old-field vegetation for 12 years, and an adjacent old-field which was not cropped. The study was carried out on the Georgia Piedmont for 2 years following the fallow period. Soil nutrient availability was related to chemical concentrations in the soil solution, plant nutrient uptake and litter decomposition. During the first year after fallow, soil nitrate concentrations were highest in plowed systems and lowest in the old field. Extractable cation concentrations were generally higher in conventional tillage than in no-tillage soil during the 1st year after fallow. However, during the 2nd year, cation concentrations were generally higher in no-tillage soil. Nitrate concentrations in the soil solution at 60 cm depth were generally highest in conventional tillage, followed by no-tillage, and lowest in old-field systems. During the first year, total nutrient uptake by crops (grain sorghum and rye) and weeds was higher in conventional than in no-tillage systems. From the first to the second year, uptake decreased in both cropping systems, but proportionately more in conventional tillage systems, so that uptake in the second year was similar in the two cropping treatments. Higher nitrate concentrations in the leachate of conventional than in no-tillage and old-field systems suggested that plowing stimulated nitrification
| Item Type: | Article |
|---|---|
| Author Affiliation: | Institute of Ecology and Department of Agronomy, University of Georgia, Athens, GA 30603, USA |
| Subjects: | Plant Production > Croping Systems Soil Science and Microbiology > Soil Sciences |
| Divisions: | Maize Sorghum |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 22 Nov 2012 03:50 |
| Last Modified: | 22 Nov 2012 03:50 |
| Official URL: | http://dx.doi.org/10.1016/0167-1987(83)90028-4 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/8857 |
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