A field experiment was conducted during the rabi seasons of 2010 to 2013 to find out the optimum time of sowing and plant spacing for broccoli (var. KTS-1) seed production. Seedlings raised by sowing on four different dates viz. 10 th October, 30 th October, 20 th November and 10 th December were transplanted at two spacing viz. 45 cm x 45 cm and 60 cm x 45 cm. Yield and yield attributing characters were significantly influenced by the treatments. Sowing on 10 th October produced the highest head yield (137.81q/ha) while 10 December sowing produced the lowest head yield (6.75 q/ha) of broccoli. Closer spacing (45 cm x 45 cm) gave significantly higher head yield (88.28 q/ha) than planting at 60 cm x 45 cm distance. The highest seed yield (177 kg/ha) was obtained on planting 10 October sown seedlings at 45 cm x 45 cm distance and was the most remunerative (B: C ratio of 6.44) among all the treatment combinations. Plants from delayed sowing of 20 th November and 10 th December failed to produce viable seeds under agro-climatic condition of Assam.
A field trail in a complete Randomized Design was conducted at Bidhan Chandra Krishi Viswavidyalaya, West Bengal during 2010-2011 to assess the growth, flowering, fruiting, yield and quality of tamarind of five varieties namely PKM-1, Urigam, Vantoor, Red and Sweet. The results indicated superiority of variety PKM-1 with plant height (445.33-569 cm), East-west canopy expansion (458.67-604.00 cm), number of fruit retention panicle -1 (44.33%), TSS (48 0 Brix), total sugar (40.33 g) with lower acidity (6.7 mg). The variety Urigam exhibited better performance with the characters like canopy expansion in North South direction (491.00 -612.00 cm), trunk girth (39-52 cm), number of flowers panicle -1 (14.33), number of fruit set panicle -1 (10.33), fruit length (20.67 cm) and diameter (25.30 mm), fruit weight (17.77 g) and fruit yield tree -1 (1388 g). Varieties Urigam and PKM-1 may be introduced in West Bengal for commercial cultivation.
Muga, (Antherea assamensis, Helfer) is a polyphagous multivoltine insect. (Chakravorty et al., 2004) Due to outdoor rearing the muga larvae are subject to different biotic factors and abiotic stress. The seasonal differences in the environmental components considerably affect the genotypic expression in the form phenotypic output of silkworm such as cocoon weight, pupal weight, shell weight and shell ratio. An attempt has been made on two primary host plants viz. Som and Soalu to investigate their comparative performance on rearing in study area on different rearing seasons. Results indicated highest Shell weight and Shell Ratio(SR %) when fed on Som plant (T1) where as Larval weight, Pupal weight is highest when fed on Soalu (T2) plant and the results also reveals lowest performance in Soalu to Som fed batch (T3). This study also reveals that Kotia (V1) season showing best rearing performance followed by Jethua (V2), Bhodia (V3) and Chotua (V4). This study was conducted continually three years in the same area and showing same trend. T-1 and V1 showed the best commercial characters of Antherea assamensis, Helfer when silkworm larvae were feed with Som leaves. Therefore, it is suggested that Som leaves can be used in rearing for higher yield of muga silk. If there is a shortage of Som leaves during commercial rearing, then Chawki rearing can be done in Soalu plants and then transferred to Som plant for late age rearing.
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