Journal of Food, Agriculture and Environment

Vol 7, Issue 2,2009
Online ISSN: 1459-0263
Print ISSN: 1459-0255

The response of cassava to potassium fertilizer treatments


F. O. Adekayode *, O. F. Adeola

Recieved Date: 2009-01-02, Accepted Date: 2009-04-12


The increased production of cassava for poverty alleviation had been advocated for by the Government of Federal Republic of Nigeria. Though the use of fertilizer had been identified as a major input to achieve this, the rising prohibitive fertilizer cost had necessitated investigating into the economic use of fertilizer for optimum cassava production for profit maximization. The response of cassava to varying rates of potassium was therefore investigated in a research conducted in Owo (Latitude 7°11’N, Longitude 5°30’E) in 2006 and 2007. Cassava TMS 30572 variety that matured within ten months was planted in April 2006 and the experiment revalidated in April 2007. The cuttings were planted at a spacing of 50 cm on ridges 90 cm apart. The experimental design was a randomized block replicated three times and the fertilizer treatments were K2O 150, 120, 90 and 60 kg/ha potassium chloride and control plot without fertilizer application (0 kg/ha). Cassava was harvested at ten months and the yield parameters were taken. Significantly higher yields of 22.9 and 20.8 t/ha were obtained in plots treated with 150 and 120 kg/ha potassium compared with other plots treated with 90, 60 and 0 kg/ha potassium with corresponding yield values of 18.0, 17.6 and 12 t/ha respectively. The increasing rate of potassium fertilizer was positively correlated to cassava yield (r = 0.99) with a linear regression equation of y = 12.3459 + 0.0704x. The net revenues in the plots as treated with K2O 150, 120, 90, 60, 0 kg/ha were #84,600.00, #70,700.00, #51,500.00, #53,400.00 and #18,500.00 respectively. The higher yield values associated with higher potassium application confirmed the high potassium need for cassava and the improved response of cassava to increasing potassium fertilizer rate.


Fertilizer application, cassava yield, profitable response

Journal: Journal of Food, Agriculture and Environment
Year: 2009
Volume: 7
Issue: 2
Category: Agriculture
Pages: 279-282

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