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SUSTAINABLE CROP PRODUCTION RETAINING SOIL FERTILITY AND ENVIRONMENT THROUGH AGRO-FORESTRY SYSTEM (Pages : 1 - 5)

M. H. R. SHEIKH, M. O. ALI, M.S. KHAN, A. HANNAN AND M. T. RAHMAN

A field experiment on sustainable crop production retaining soil fertility and environment through agro- forestry system was carried out in High Ganges Floodplain Soils (AEZ-11) of Ishurdi in the farmer’s existing Mehagoni orchard of village Velupara during the period of 2005-2006 to determine the spatial soil variability and crop productivity as affected by tree pruning/training management. The experimental tree species was Mehagoni and crops were Black gram, Wheat and Broadcast Aus. There were five treatments viz. T1 = tree with crop and training & mulching at 4 month interval, T2 = tree with crop and training & mulching at 6 month interval, T3 = tree with crop and training & mulching at 1 year interval, T4= tree with crop but Non training, T5= tree without crop and Non training. Statistically significant results were obtained and T2 (i.e. tree with crop and training & mulching at 6 months interval) showed the best performance. Highest grain yield and straw weight of B-Aus, Blackgram and Wheat were obtained from T2. Highest tree height and breadth were also obtained from T2. Statistically significant results were obtained from increase of tree height but statistically identical results were obtained from T1, T3, T4 and T5 in case of tree breadth. The economic analysis showed that highest gross margin (Tk. 29,928/ha/yr) was obtained from T2 against the variable cost (Tk. 30,723/ha/yr). The highest marginal rate of return 1,321% was obtained from T3 along with gross margin of Tk. 18,437/ha/yr. Soil fertility status was improved due to addition of biomass through mulching of tree leaves and biomass of Blackgram in the pattern. Download


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