Effect of burnt and unburnt rice husk dust on maize yield and soil physico-chemical properties of an ultisol in Nigeria
2012
Njoku, C. | Mbah, C. N.
Field experiments were conducted at the Teaching and Research Farm of the Faculty of Agriculture and Natural Resources Management, Ebonyi State University, Abakaliki, southeastern Nigeria, in 2008, 2009, and 2010, to study the selected physico-chemical properties of an ultisol and maize yield (Zea mays L.) as influenced by application of rice husk dust in 2008 and 2009 and the residual effect in 2010. Soil bulk density, total porosity, moisture content, soil organic carbon, total nitrogen, C:N ratio, pH, and available phosphorus and exchangeable bases were all significantly affected by amendment with rice husk dust at the rates of 10 and 20 t ha ⁻ ¹. In general, bulk density, total porosity, soil water content, organic carbon, and C:N were more affected by unburnt than burnt waste, while the reverse was true for pH, available phosphorus, and exchangeable K ⁺ and Ca ²⁺. Application of rice husk dust resulted in increased maize grain yields during the two seasons when it was applied and as a residual effect in the following season.
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