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A field experiment was conducted in the Agroforestry Field Laboratory of Bangladesh Agricultural University (BAU), Mymensingh, during the period from November 2016 to April 2017 to find out the response of Rain tree (Samanea saman), Ipil-Ipil (Leucaena leucephala), and Minjiri (Senna siamea), leaves biomass with different fertilizers dose applications to yield and yield contributing character of Chinese Hybrid Rice cv. SQR6. Ten treatments were used for the Randomized Complete Block Design (RCBD) with three replications. The results showed that green LB had a significant effect on crop characters viz., plant height, panicle length, no. of tillers hill-1, no. of leaves hill-1, no. of panicles hill-1, no. of effective tillers hill-1, no. of non-effective tillers hill-1, no. of spikelets panicle-1 and 1000-grain weight. The panicle length varied from 22.30 to 25.11 cm. The number of leaves on hill-1 varied from 62.00-26.00. The number of effective tillers on hill-1 varied from 12.23-10.24 whereas the number of non-effective tillers on hill-1 varied from 3.10-1.29. The maximum grain yield of 8.96 t ha-1 was obtained from Treatment T10 followed by T6 where Ipil-Ipil of LB with 45% RFD was applied with a grain yield of 8.63 t ha-1. Therefore, this study suggests that the green LB of Ipil-Ipil and Minjiri could be used the improvement of yield contributing characteristics of rice. Bangladesh J. Agri. 2022, 47(2): 133-142

A field experiment was conducted in the Agroforestry Field Laboratory of Bangladesh Agricultural University, Mymensingh during the period from November 2016 to April 2017 to find out the effects of Sadakoroi (Albizia procera), Kalokoroi (Albizia lebbeck) and Akashmoni (Acacia auriculiformis), leaves biomass with different fertilizers dose applications on the yield and yield contributing characters of Chinese Hybrid Rice. There were 10 treatments : T1 = Sadakoroi (leaf biomass 2 kg /plot ) + 15% RFD (Recommended fertilizer dose), T2= Sadakoroi (leaf biomass 2 kg /plot )+ 30% RFD, T3 = Sadakoroi (leaf biomass 2 kg /plot )+ 45% RFD, T4 = Kalokoroi (leaf biomass 2 kg /plot) + 15% RFD, T5 = Kalokoroi (leaf biomass 2 kg /plot) + 30% RFD, T6 = Kalokoroi (leaf biomass 2 kg /plot) + 45% RFD, T7 = Akashmoni (leaf biomass 2 kg /plot) + 15% RFD, T8 = Akashmoni (leaf biomass 2 kg /plot) + 30% RFD, T9 = Akashmoni (leaf biomass 2 kg /plot) + 45% RFD and T10= Control ( 100% RFD). The boro hybrid rice var. SQR6 was used as a test crop. The experiment was conducted in a Randomized Complete Block Design (RCBD) with three replications. The result showed that green leaf biomass had a significant effect on the yield contributing characters. The panicle length varied from 21.0 to 25.5 cm. The number of leaves on hill-1 varied from 40.2-25.9. The number of effective tillers on hill-1 varied from 12.27-10.63. The highest grain yield of 8.87 t ha-1was obtained from treatment T10 followed by 8.77 tha-1 noted with T3 where Sadakoroi leaf biomass was applied. Therefore, this study suggests that the green leaf biomass of Sadakoroi and Kalokoroi can be applied to the improvement of yield and yield contributing characters of rice. Bangladesh J. Agri. 2022, 47(2): 44-52

The Barind Integrated Area Development Project (BIADP), NW Bangladesh launched in late eighties of last century boosted cropping intensity from 117% in pre-BIADP to about 200% at present. Increasing trend of rainfall for the period 1980-2006 in the southern portion had a positive impact on BIADP, but in the northeastern part, reverse trend is indicated. The groundwater outflow from the central part following the surface gradient is indicative of effluent drainage characteristics. Although rainfall has increased in the southern part, there has been progressive decline in groundwater level due to increase in irrigation demand. In the northern part there has been decline in groundwater level due to less resource potential. The PET, ET crops and net irrigation requirement generally has decreased from pre- to post- Project implementation stages and rainwater has been the supplementary irrigation resource and thus dependency on groundwater has been reduced with exception in northwestern part. While the southern part is marching towards humid condition, north is creeping towards semi-aridity. Proper groundwater resource management with ecological balance is warranted for the sustainability of BIADP.