An experiment was conducted to determine the effect of applying low rates of lime and chicken manure on bean (var. NABE 15) growth and yield on Ferralsols. Using split plot factorial randomized complete block design, lime (0.0, 0.5, 1.0, 1.5 and 2.0 t ha -1 ) as the main plot and chicken manure (0.0, 1.0, 2.0 and 3.0 t ha -1 ) as sub plot, were replicated three times. The experiment was conducted for three rainy seasons, two seasons' on-station and one season on-farm using promising combinations from the onstation experiments. In Mukono, increased grain yield of 117% over the control was observed at 2.0 t ha -1 lime with 1.0 t ha -1 manure. Applying 1.5 t ha -1 lime with 2.0 or 3.0 t ha -1 manure resulted in a yield increase of 81.1 and 103.6% over the control respectively. Applying 0.5 t ha -1 lime or 1.0 and 2.0 t ha -1 manure alone caused minimal yields. In Masaka 0.5 t ha -1 lime with 3.0 t ha -1 manure, resulted in 95% yield increase over the control. The control and 0.5 t ha -1 lime yielded the least. All the BCRs were less than one; there was net gain in nutrients (NPK) for the subsequent crop.
Ferralsols form a dominant type of soil on which most crops are grown in the Lake Victoria agro-ecological zone. Soil acidity has been recognized among the most important agricultural problems in such soils, which adversely affect crop production and productivity. A study was conducted with the objective of determining the effect of applying low rates of lime and chicken manure on selected soil chemical properties. Using a Split Plot Factorial Randomized Complete Block Design, agricultural lime (0.0, 0.5, 1.0, 1.5 & 2.0 t•ha −1 ) as the main plot and chicken manure (0.0, 1.0, 2.0 & 3.0 t•ha −1 ) as sub-plot were applied, replicated three times. The test crop was common bean var. NABE 15. The experiment was conducted for three rainy seasons, two seasons on-station and one season on-farm on Ferralsol soil in the Lake Victoria crescent of central Uganda. The results showed that applying low rates of lime with chicken manure significantly (p < 0.05) increased pH, CEC, P, N, K, BS and Mn changes at Mukono but not Masaka. A strong positive significant (r 2 = 0.987) relationship with pH change was obtained when 0.5 t•ha −1 lime was applied with the four chicken manure rates in Mukono. From the study, we recommend the application of small quantities of lime at 1.0 t•ha −1 with either 2.0 or 3.0 t•ha −1 chicken manure.
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