• M.A. Tarafder Soil Science Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202

    M.R. Khan Soil Science Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202

    M.S. Priti Soil Science Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202

    M.H. Rahman Soil Science Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202


Soil fertility is the ability of soil to sustain plant growth and optimize crop production. A field experiment was conducted at Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh adding green manuring crops in Boro-Fallow-T. aman rice cropping pattern to improve soil fertility and crop productivity. The experiments comprised seven treatments for Boro-Fallow-T.aman rice were T1 = Control (without fertilizer), T2 = Soil Test Based (STB) 100% chemical fertilizers, T3 = STB based 70% chemical fertilizers + cowdung (5 t ha-1), T4 = STB based 100% chemical fertilizers for boro rice (only N fertilizer in T.aman rice), T5 = STB based 70% chemical fertilizers to each crop, T6 = STB based 100% chemical fertilizers for boro rice + 50% chemical fertilizers for T.aman rice and T7 = STB based 100% chemical fertilizers for boro rice + 50% chemical fertilizers for T.aman rice without green manuring in the system. Green manuring crop (Dhancha) was grown in a highland adjacent to this plot and transferred to the experimental plot @ 8 t ha-1 (fresh wt. basis) and mixed with the soil after harvesting first crop (boro rice). Initial and post-harvest soil samples were analyzed for chemical properties, grain yield and straw yield was collected as whole plot basis. The result showed significant difference between the treatments. The highest grain yield of Boro 7.21 (t ha-1) was recorded in treatment T4 (N140P45K85S35Zn4B2 kg ha-1) which was statistically identical with T2 (7.18 t ha-1), T6 (7.17 t ha-1) and T7 (7.12 t ha-1) treatments. Results of T.aman rice indicated that application of cowdung @ 5 t ha-1 along with 70% chemical fertilizer applied in the first crop (boro) of the pattern showed beneficial effect on the second crop (T.aman rice). The highest net benefit of Tk. 96,272 ha-1 was recorded in treatment T6. Nutrient uptake followed the order N>K>P> and S. Application of recommended dose of fertilizer in first crop (boro) of the pattern and incorporation of dhaincha (sesbaniaacueleta) as green manure 5-6 days before transplanting of T.aman rice along with 30% reduced dose application of inorganic fertilizers at the second crop may substantially increase the production of Boro-Fallow-T.aman rice as well as improve the soil fertility status.


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Research Article