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dc:title "HTML Summary of #63 \n\nUse of rainfall indices to analyze the effects of
\nphosphate rocks on millet in the Sahel\n\n";
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bibo:abstract "Two critical factors that explain low crop productivity in the Sahelian agro-ecozone are inadequate\r\nmoisture and poor soils, particularly phosphorus (P) deficiency. The purpose of this long-term study\r\nwas to explore the use of both local phosphate rock (PR) and inorganic P on yields and risk of millet\r\nreturns under the uncertain rainfall regimes in the Sahel. Using the Standardized Precipitation Index\r\n(SPI) and Percent Confidence Limits (PCL) of the mean rainfall, the 10-year experimental period was\r\ngrouped into rainfall classes. Results showed that the inorganic P fertilizers, that is, single\r\nsuperphosphate and triple superphosphate (SSP+N and TSP) gave the highest average yields. Also,\r\nmillet yield increased with increasing P rates. However, typical farmers in the Sahel barely use P rates\r\nabove 20 kg ha-1 in view of the high cost of imported fertilizers. A low application rate of the local PR, 10\r\nkg P ha-1, increased millet yield between 44 and 67%. Stability analysis using yields from 15 farmers’\r\nfields indicated that the traditional method of growing millet was the least stable (s.e. = 225) and had the\r\nlowest yield (314 kg ha-1). Generally, millet responded to P better when the preseason (May-June) were\r\nwet than dry, except where the non-acidulated PR (PRA) was applied every year (R2=0.99, P < 0.01) for\r\nboth dry and wet preseasons. Risk analysis showed that acidulated PR regardless of rates gave the\r\nhighest millet returns over variable cost of P fertilizer. The study recommends the promotion PR in\r\norder to guarantee stable yields and income for small farmers in the Sahel."^^xsd:string;
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bibo:issue "3";
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bibo:volume "6";
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dct:date "2011";
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dct:title "Use of rainfall indices to analyze the effects of\r\nphosphate rocks on millet in the Sahel"^^xsd:string;
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skos:prefLabel "Millets"@en .
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foaf:familyName "Koala"^^xsd:string;
foaf:givenName "S"^^xsd:string;
foaf:name "S Koala"^^xsd:string;
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foaf:familyName "Yamoah"^^xsd:string;
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foaf:name "C F Yamoah"^^xsd:string;
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bibo:issn "1991637X";
foaf:name "African Journal of Agricultural Research"^^xsd:string;
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