Green Global
Foundation   Journal
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RESIDUAL EFFECT OF COCOA POD ASH, POULTRY MANURE AND NPK 20:10:10 FERTILIZER ON SOIL NUTRIENTS, NUTRIENT UPTAKE AND YIELD OF MAIZE (Zea mays) (Pages : 4 - 9)

Pot experiment to determine effect of cocoa pod ash (0, 5 and 10 t ha-1 ), poultry manure (0. 5 and 10 t ha-1 ) and NPK 20:10:10 fertilizer (0, 200 and 400 kg ha-1 ) on soil, plant nutrients properties and maize yield in southwest Nigeria in 2005 and repeated in 2006 without new treatments. The treatments were control, 5 t ha-1 poultry manure (P5), 10 t ha-1 poultry manure (P10), 5 t ha-1 cocoa pod ash (C5), 10 t ha-1 cocoa pod ash (C10), 200 kg ha-1 NPK 20:10:10 fertilizer (F200) and 400 Kg ha-1 NPK 20:10:10 fertilizer (F400). Among the treatments, P10 had highest soil OM, N, Ca, P and Fe, C5 and C10 most increased K, while F400 had highest Cu, Zn and Mn. On residual basis, P10 had highest OM, Ca, Mg, P and Fe. Among the treatments, P10 had highest plant P, Ca, Cu and Mn. F400 had highest plant N and Fe. On residual basis, all the treatments had higher N and Zn except (F400) than control. Only P10 had higher P than control. In 2005, compared with control, all the treatments significantly increased (p<0.05) plant height, grain yield (except C10 and P5) and root dry matter (except P5). On residual basis only P10 significantly increased grain, stover and root yields. Increases in grain yield were P10 > F400 > C5 > F200 > P5 on immediate basis and P10>C10>F400>P5>F200>C5 on residual basis. The cumulative yield increases were P10 (61.97g), F400 (51.07g), C5 (47.55g), F200 (45.54g), C10 (44.65g), P5 (41.96g) and control (39.15g). Poultry manure had the best effect on soil and plant nutrients as well as yield components. Download