The Effects of No-Tillage, Crop Residue And Irrigation on Crop Production and Soil Chemical Properties of a Sandy Soil in the Dry Region Of Nigeria

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Maurya P.R
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The soil available P was significantly higher (41 mg kg-i) in the top 20 em soil layer in the no-tillage than in the conventional tillage (19 mg kg-i) plots. Total N, available P and K+ in the soil profile were slightly higher in the plots from which residue was not removed as compared to those from which residue was removed. The frequent irrigation (5-day interval with total application of 680 rom) plots had 10-20% lower total nitrogen and available K+ in the root zone than the less frequently irrigated plots (8-day interval with water application of 480 mm). However, exchangeable ea+2 was higher in the former than in the latter treatment. The mean wheat grain yield (across 3 years) were 1.53 and 1.79 t ha-1 in the no-tillage and conventional tillage treatments, respectively. The grain yield of maize was 60% higher in the conventional tillage treatments than in the no-tillage treatments.
East African Agricultural And Forestry Journal, LIV (1-2), p. 43-51