No abstract

Sea level rising, as a result of global warming, is a major threat to crop production; because inclusion of saline water in crop land limits the crop production. So, an experiment was undertaken to evaluate some mungbean genotypes under different levels of salt stresses in germination stage. The experiment was conducted at Regional Agricultural Research Station, Jashore during Rabi 2020-2021. The seeds of seven mungbean genotypes viz. BARI Mung-6, BARI Mung-8, BMXKI-112004-3, BMXKI- 112009-21, MMAT-V07, BMMP-201524 and BMMP-201506 were collected from different sources. This experiment was conducted following factorial completely randomized design (CRD) with two replications. The experimental factors were i) mungbean genotypes (seven) and ii) salt stress (three levels: 0, 4 and 8 dSm-1). The results showed that mungbean var. BARI Mung-6 at 0 dSm-1 and 4 dSm-1 showed highest value in case of germination index (9), germination percentage (100%), co-efficient of germination (40), vigor index (1950) and lowest value in case of mean germination time (2.5). BARI Mung-8 at 0 dS m-1 showed the inverse results. Genotype BMXKI-112009- 21, MMAT-V07 and BMMP-201524 at 4 dSm-1 and in some extent in 8 dSm-1 showed highest value in case of germination stress tolerance index, plant height stress index, root length stress index, shoot fresh weight stress index, root fresh weight stress index, shoot dry weight stress index and in root dry weight stress index. The lowest values in these parameters were found in BARI Mung-8 at 8 dSm-1 salt stress. BARI Mung-6, MMATV07, BMXKI-112009-21 and BMMP-201524 genotypes were found to be more tolerant to salt stress than rest of the genotypes in germination stage. Bangladesh Agron. J. 2022, 25(1): 57-65

A field study was undertaken at Bangladesh Agricultural University, Mymensingh during the season November 2017 to April 2018 to evaluate the effects of plant × row spacings on yield and yield contributing traits of two Boro rice varieties. Two rice varieties viz., BINA dhan-10 and BRRI dhan28 were sown in five plant spacings viz. 25 cm × 15 cm, 25 cm × 25 cm, 30 cm × 30 cm, 35 cm × 35 cm, 40 cm × 40 cm in randomized completely block design with factorial fashion with three replications. Growth performances, yield contributing characters and yield were significantly influenced by varieties and plant spacings. The highest grain yield (8.75t ha-1), straw yield (11.56 t ha-1), biological yield (20.31 t ha-1) and harvest index (43.05 %) were obtained from the variety BINA dhan- 10 sown at planting spacing of25 cm × 15 cm. More number of total tillers hill-1(14.75) and number of effective tiller hill-1 (12.87) were recorded from the variety BINA dhan-10 sown at planting spacing 40 cm × 40 cm. Based on the present study it is suggested that BINA dhan-10 may be grown under 25 cm × 15 cm in order to get maximum grain yield for Boro rice cultivation. SAARC J. Agric., 19(2): 95-106 (2021)

The production area of chickpea in Bangladesh is decreasing day by day due to the competition with higher yielding crop which is/or profitable than chickpea. As such, the experiment was undertaken at Regional Agricultural Research Station, Jashore during 2019-2020 and 2020-2021 to study the effect of most suitable method of de-topping (nipping) in chickpea (var. BARI Chola-10) for its growth and yield improvement. Treatments were imposed in a split-plot design where in main plot : time of nipping : 30 days after emergence (DAE) , 40 DAE E3- 50 DAE and in sub-plot: different heights of nipping practices: Control, Nipping 5 cm from growing tip, Nipping 8 cm from growing tip and Nipping 10 cm from growing tip. In interaction treatment, the highest days to flower (68), days to mature (112), vegetable yield (703 kg ha-1) was observed when chickpea plants were de-topped after 50 DAE at 10 cm from growing tip. The highest plant height (46 cm) was observed when de-topping at 40 DAE was done at 10 cm from growing tip. Seed yield (1419.95 kg ha-1) and Marginal Benefit Cost Ratio (MBCR) (13.1) was recorded maximum when chickpea plants de-topped 50 DAE at 5 cm from growing tip. De-topping practices in chickpea (var. BARI Chola-10) after 50 DAE at 5 cm from growing tip could maximize the productivity of chickpea. Bangladesh Agron. J. 2021, 24(2): 109-113