McLean, E.O. and Ssali, H. (1977) Effects of Phosphorus Rate and Form in Combination With Lime and Gypsum on Yields and Compositions of German Millet and Alfalfa From Highly Weathered Soils. Soil Science, 123 (3). pp. 155-164.
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Abstract
A study was conducted to evaluate effects of phosphorus rate and form (degree of acidulation of rock phosphate) in combination with liming (pH levels) and gypsum additions on yields and composition of German millet (Setaria italica, "German") and alfalfa (Medicago sativa L. Vernal). The study was conducted in a growth chamber on three relatively highly weathered soils, i.e., two Oxisols from Uganda and one oxidic Ultisol from Tennessee. German millet yields increased significantly when P was applied at all pH levels on all soils. On the relatively more weathered Kabanyolo and Alcoa soils, yields were not significantly different from P1(TSP) and P2(PARP), but those from P1(TSP) were superior to both P1(TSP) and P2(PARP). On relatively less weathered Serere soil, yields of German millet were not significantly different from P1(TSP) and P2(TSP), but both were significantly higher than that from P2(PARP). For all soils, German millet yields were highest at lowest pH level, and decreased with increasing pH. Alfalfa yields were significantly increased by P on Serere and Alcoa soils, but they were not significantly different from P1(TSP), P2(TSP), or P2(PARP). In contrast, alfalfa yields were significantly depressed by P on Kabanyolo soil which had relatively high levels of Al-P and native available P. Alfalfa yields markedly increased with initial increase in pH and generally continued to increase at high Ca and pH levels. Plant analysis and visual symptoms suggested that manganese was the main adverse factor depressing alfalfa growth at lower pH levels. The reason for somewhat different results from those reported previously for Ohio and Virginia soils appears to be a consequence of lower level of exchangeable Al in more highly weathered soils used in this study
| Item Type: | Article |
|---|---|
| Author Affiliation: | Department of Agronomy, Ohio State University, Columbus and Ohio Agricultural Research and Development Center, Wooster |
| Subjects: | Plant Production |
| Divisions: | Millet |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 09 May 2012 10:56 |
| Last Modified: | 09 May 2012 10:56 |
| Official URL: | http://journals.lww.com/soilsci/toc/1977/03000#-73... |
| URI: | http://eprints.icrisat.ac.in/id/eprint/5209 |
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