Author(s):

Geetanjali, Narayana Rao K and Mahadevaswamy

Abstract: A field experiment was conducted to study the soil dehydrogenase activity and nutrient uptake by maize as influenced by application of flyash and organic manures during the kharif 2015. The results showed that the soil dehydrogenase activity and nutrient uptake by maize were conspicuously increased with application of flyash with organic manures compare to application of only flyash. The highest activity of soil dehydrogenase activity (11.57 μg TPF h^-1 g^-1 soil) was observed with treatment receiving flyash @ 15 t ha^-1 + municipal compost @ 15 t ha^-1 along with RDF. Similarly total macro nutrient uptake of N, P₂O₅, K₂O, S were 213.00, 27.91, 269.02, 34.94 kg ha^-1 respectively and micronutrient uptake maximum total uptake of Fe, Mn, Cu and Zn (2708.33, 1406.64, 104.95 and 699.29 g ha^-1 respectively) were found in treatment receiving flyash @ 15 t ha^-1 + municipal compost @ 15 t ha^-1 along with RDF compare to other treatment combinations.

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