Mupangwa, W T and Tagwira, F (2005) Groundnut yield response to single superphosphate, calcitic lime and gypsum on acid granitic sandy soil. Nutrient Cycling in Agroecosystems, 73 (2-3). pp. 161-169. ISSN 1385-1314
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Abstract
Phosphorus and calcium are the major nutrients limiting groundnut production. The objectives were to determine (a) optimum application levels of P and Ca, and (b) compare the effectiveness of calcitic lime (40% Ca, 4.5% Mg) and gypsum (22% Ca, 17% S) as sources of Ca for groundnut grown on sandy soils. Field experiments were established in smallholder farming areas using four levels of P (0, 8.5, 17 and 34 kg ha-1) combined factorially with calcitic lime (0, 200, 400 and 800 kg ha-1) to give 16 treatments. Similar levels of P were combined factorially with gypsum (0, 100, 200 and 400 kg ha-1) to give sixteen treatments. Experiments were laid in a randomized complete block design with three replications. Phosphorus had a significant effect on groundnut yield at the majority of the experimental sites. Application of P at 8.5 kg ha-1 gave the optimum groundnut yield response. The optimum application rates for calcitic lime and gypsum were 200 and 100 kg ha-1. Gypsum and calcitic lime were not significantly different as sources of Ca for groundnut. Soil chemical properties were significantly improved following application of P and Ca sources
| Item Type: | Article |
|---|---|
| Divisions: | UNSPECIFIED |
| CRP: | UNSPECIFIED |
| Uncontrolled Keywords: | Calcitic lime, Groundnut, Gypsum, Phosphorus, Sandy soil |
| Subjects: | Mandate crops > Groundnut |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 15 Jun 2012 06:10 |
| Last Modified: | 20 Sep 2013 09:42 |
| URI: | http://oar.icrisat.org/id/eprint/5992 |
| Official URL: | http://dx.doi.org/10.1007/s10705-005-0075-3 |
| Projects: | UNSPECIFIED |
| Funders: | UNSPECIFIED |
| Acknowledgement: | UNSPECIFIED |
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