Utilization of locally available farm wastes in the yield of cassava using the balanced fertilization strategy
2012
Salomes, F.M. | Nahul, A.A., Department of Agriculture-Regional Field Unit 9 , Lenienza, Pagadian City (Philippines) | Andalahao, P.M., Western Mindanao Integrated Agricultural Research Center, Sanito, Ipil, Zamboanga Sibugay (Philippines) | Ambabang, P.L. | Comamao, J.G. | Comamao, J.J., Western Mindanao Horticultural Center , Siari, Sindangan, Zamboanga del Norte (Philippines)
Balanced Fertilization Strategy (BFS) is promoted under Presidential Proclamation No. 1071 to increase production and maintain soils fertility by combining organic and inorganic fertilizers. The study was conducted at Western Mindanao Horticultural Center (WMHC), Siari, Sindangan, Zamboanga del Norte in a clay-loam soil using a split plot design. The farm wastes were carbonized rice hull (CRH), decomposed animal manure (DAM), decomposed corn husk (DCH) and decomposed rice straw (DRS) as main treatments. The sub-treatments were 0, 0.50, 1.00 and 1.50 bags/ha of urea reduced in application and replaced with equivalent amount from farm wastes. Results revealed that soils fertility of the experimental site had depleted after cassava were harvested except to plots with reduction of urea application at the rates of 1 and 1.50 bags/ha and substituted from CRH in equal nutrient amounts of 4.86 and 7.29 t/ha, respectively and those replaced with DCH at 5.48 t/ha had maintain the soil pH 5.6 level. CRH application significantly produced more tuber over DCH and DRS. Among sub-treatments, reduction of 1.50 bags/ha and replaced with the same amounts from farm wastes were significantly unproductive. Further, farm wastes x rates of application did not significantly interacted in the yield performance of cassava except in the tubers circumference. Economically, CRH and DAM gave the highest net incomes and ROCs compared to other farm wastes. For the sub-treatments, highest ROC of 47.50% by plot with reduction of 1 bag of urea and replaced with the same amount from farm wastes. It is concluded that reduction of 1 bag of urea and substituted to CRH at 4.86 t/ha would maintain soil pH and fertilizer recommendation for the next cropping season and gave optimum tuber yield.
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