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Title: Response of groundnut(Arachis hypognea L.) and bean(Phaseolus vulgaris L.) to fertilizers and line application in Siaya District
Authors: Nyongesa, Humphrey,Wanjala
Keywords: Groundnuts
Issue Date: Jun-1998
Publisher: Egerton University
Abstract: Two field trials were conducted at four on farm sites in Ukwala and Wagai divisions of Siaya district during the long rains of March to August 1997. The sites were at Lufunga, Yenga, Kamrenrbo and Wagai. The experiments were conducted to study the effect of nitrogen, phosphorus lirrre, trace elements and 1t/rizobirmr inoculation on the growth and yield of groundnut and bean. To test the lst and 2nd hypothesis an exploratory trial was conducted where the factors under study were nitrogen, phosphorus, lime and trace elements each at two rates. For each factor, there was either no application or application at rates of 60kg N/ha, 60kg P205/ha, 4 t/ha and lkg/ha for nitrogen, phosphorus, lime, and trace elements respectively. The four factors each at two levels were combined to give sixteen treatments, which were laid out in randomized complete block design with three replicates. The test crops were the local beans (P/iaseo/us rulguris L). Variety, Okuodo and two groundnut (A/"ac/rrls" lrypugaea L). Varieties, Uganda red and Homabay. The bean trials were located at Lufunga, Yenga and Karrrrembo and the groundnut trials at Lufimga, Yenga, Kamrenrbo and Wagai. To test the 3rd hypothesis phosphorus rate trial were conducted with or without It/rizobirun inoculation of groundnut and bean. The four phosphorus rates used were 0, 20, 40, 60 Kg P205 /ha. The two levels of Rlrizabium inoculation and four phosphorus rates were combined to give eight treatments, which were allocated in a randomized complete block design in a split plot arrangement with three rephcations. Nitrogen application had higher number of inmrature pods and dry biomass for groundnut at Kamrembo whereas at Yenga it significantly (P 5 0.05) reduced the number of nodules. Phosphorus fertilization had significantly (P 3 0.05) higher dry biomass, mature pods and grain yield at Kamrernbo and nodule number and mass at Yenga and Wagai. Lime had higher dry biomass, mature pods at Kamrembo and nodule number" of grourrdnuts at Yenga. Trace elerrrerrts had higher dry biomass, mature pods and grain yield of groundrruts at karnrembo, nodule number and mass of groundnut at Yenga. Lime + trace elements had highest mature pods, yield and dry biomass of groundnut at Kamrembo. Phosphorus + lime had the highest nodule number, phosphorus + trace elements had highest nodule mass at Yenga for groundnuts. For the beans Nitrogen + phosphorus had higher seed number, The results also show that phosphorus + lime had highest grain yield and nitrogen + phosphorus + lime + trace elements had highest dry biomass and yield at Yenga. Rliizubium inoculation significantly enhanced the number of nodules at Lufunga, Yenga and Wagai while nodule mass only ofgroundnuts at Yenga. Rhizubium + phosphorus significantly influenced the number of nodules and nodule nrass at Yenga and grain yield of groundnuts at Wagai. However the yield of both grourrdnuts and beans increased with phosphorus levels.
Appears in Collections:Faculty of Agriculture

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