A two year (2010 and 2011) experiment was conducted on four mungbean varieties (V 1 -Pant Mung-5, V 2 -Bireswar, V 3 -RMG-62 and V 4 -Sukumar) sown on three different dates (D 1 -15 th February, D 2 -1 st March, D 3 -15 th March) in a split plot design (Main plotdates of sowing and Sub plot-variety) in the Student's Instructional Farm, BCKV, West Bengal. The reproductive components such as bud, flower and pod numbers plant -1 and pod:flower ratio were recorded from 25 to 46 days after emergence (DAE). The relationship between the mean air temperature and different reproductive components were computed. Bud number per plant was maximum on 34 DAE when sown on D 2 , while it was maximum on 37 DAE under D 1 and D 3 sown crops. Highest number of flower per plant was observed on 37 DAE irrespective of dates of sowing, whereas, the maximum number of pods per plant was observed on 46 DAE. Among the dates of sowing, the D 2 sown crop recorded significantly higher number of bud, flower and pod. Among the four varieties, Pant Mung-5 recorded the maximum number of bud, flower and pod per plant. Pod: flower ratio under 1 st March sowing was highest under 37 to 40 DAE. With the advancement of age, the D 3 sown crop recorded highest pod:flower ratio. Number of buds per plant was found to be significantly related to the mean air temperature in 2010 under different varieties, but in 2011, it was insignificant. However, the number of flower and pod per plant were significantly related to the mean air temperature in both the year. Increased temperature increased the number of flower plant -1 but the reverse was true in case of pod. Increased temperature under delayed sowing significantly reduced the pod number plant -1 . A temperature range of 27 to 32°C was found to be congenial for the reproductive development in mungbean.

A field experiment was conducted during boro seasons of 2004-05 and 2005-06 to find out the effects of four different date of sowing and three non-chemical weed control methods and also their interaction effects on weed flora, yield and economics of drum seeded bororice at BCKV, Mohanpur, Nadia, West Bengal, India in a split plot design. The sowing of rice was done under puddled condition by using drum-seeder, which is an upgraded device for rice sowing. Sowing of rice on 15 th December produced minimum weed density and biomass at both of the observations, maximum % of effective tillersand B:C ratiocompared to other dates of sowing. Though the highest grain (5.19 t ha-1) and straw (5.65 t ha-1) yields obtained from 1 st December sowing, but itwas closely followed by 15 th December sowing. Amongst non-chemical weed control methods, hand-weeding gave lowest weed population and dry matter m-2 at 30 and 60 DAS, which were statistically comparable with mechanical-weeding with Japanese paddy weeder. On the other hand, mechanical-weeding produced highest grain and straw yield as well as B:C ratio. In case of interaction effects of the treatments, 15 th December sowing coupled with hand weeding gave minimum weed population m-2 followed by 1 st December sowing with hand weeding treatments at both 30 and 60 DAS. Sowing of drum-seeded rice on 1 st December along with weeding by using Japanese Paddy Weeder produced higher grain yields (6.07 t ha-1), net return (` 29265) and B:C ratio (1.41) ascompared to other treatment combinations under the experiment.

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