McLean, E.O. and Carbonell, M.D. (1972) Calcium, magnesium, and potassium saturation ratios in two soils and their effects upon yields and nutrient contents of German millet and alfalfa. Soil Science Society of America Proceedings, 36 (6). pp. 927-930.
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Abstract
In glasshouse experiments on 2 soils of differing cation exchange capacities, Setaria italica (1 cut) followed by lucerne (5 cuts) was grown with Mg:Ca saturation ratios ranging from Mg 5%:Ca 75% to Mg 25%:Ca 55% and 2 K levels. S. italica yields were not affected by any treatment and lucerne yields were not affected at the above range of Ca-Mg concentrations. However, lucerne yields were more than doubled when initial Mg and Ca concentrations were increased from 3 and 18% to 5 and 75%, respectively. The Mg content of plant tissue increased with increased Mg saturation, but was decreased more per equivalent by soil K than it was increased by soil Mg. It was concluded that for most conditions, 6-10% Mg saturation (high-low soil CEC) would be adequate for maximum crop yields, although 12-15% may be more suitable for supplying adequate Mg when grasses are grown for use as the main dietary constituent of ruminants
| Item Type: | Article |
|---|---|
| Author Affiliation: | Ohio State University, Wooster, USA |
| Subjects: | Plant Protection > Pesticides Soil Science and Microbiology > Soil Sciences Crop Improvement |
| Divisions: | Millet |
| Depositing User: | Mr B Krishnamurthy |
| Date Deposited: | 12 May 2012 12:55 |
| Last Modified: | 12 May 2012 12:55 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/5240 |
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