1),T 10-Sesame + Blackgram (2:2), T 11-Sesame + Blackgram (3:1).) in a Randomized Block Design with three replications. Considering the sesame as base crop, sesame, greengram and blackgram were sown simultaneously as per treatment during post kharif seasons (Mid August-Mid September). It was observed that intercropping of sesame in green gram and blackgram had significantly superior value in respect of the Sesame Equivalent Yield (SEY), Land Equivalent Ratio (LER), Rain Water Use Efficiency (RWUE) net return and B : C ratio. From the pooled data of three years, the highest SEY (13.85q/ha) was recorded by T 8-Sesame + blackgram (1:1) followed by Sesame + Greengram (2:2) and Sesame + blackgram (2:1). The highest LER (1.42), RWUE (7.42kg/ha/mm), Net return (` 39,374/ha) and B: C ratio(4.40) was also recorded in Sesame + Blackgram (1:1).

A field experiment was conducted during rabi seasons of 2011-12 and 2012-13 at the research farm of All India Coordinated Research Project for Dryland Agriculture at Biswanath College of Agriculture, Assam Agricultural University to study the effect of foliar application of potassium on yield, drought tolerance and rain water use efficiency of toria under rainfed upland situation of Assam. The experiment was conducted with 8 treatments a Randomized Block Design with three replications. Foliar application of potassium on growth and yield of toria revealed that application of 100% N&P + 75% K as basal + 2% KCl spray before flowering + 2% KCl spray at siliqua formation (T 7 ) resulted in highest grain yield (5.66 q/ha), straw yield (10.82 q/ha), Rain Water Use Efficiency (16.23 kg/ha mm -1 ), net return (` 9341 ha -1 ) and B:C ratio (2.15).

Two varieties of pigeon pea viz., BC (local) and ICPL 88039 were grown on the sandy loam soils of AICRPDA research farm of B. N. College of Agriculture, AAU in two consecutive kharif seasons of 2012-13 to 2013-14. Both the cultivars were sown on three different dates at ten days interval starting from 3rd June to 23rd June. GDD accumulation for attaining different phenological events viz., emergence, initiation of 1st flower bud and flower appearance, 50 per cent flowering, 1st pod formation, 1st seed formation and physiological maturity were worked out. The cumulative GDD accumulations up to physiological maturity were relatively higher in BC (local) which varied from 3395.6 to 3593.5 °C day, whereas, in ICPL 88039, it varied from 2945.0 to 3296.7 °C day in different sowings and seasons. A decreasing trend in accumulated GDD for attaining any Phenological event was observed with successive delay in sowings in both the cultivars in the two seasons. In both the crop seasons, Pheno-Thermal Index (PTI) varied from 16.67 to 18.18 °C day growth day-1, in BC (local) and 18.31 to 19.11 °C day growthday-1 in ICPL 88039 during the vegetative growth period under all the sowing dates while, in the reproductive growth stage, it was comparatively lower and ranged from 7.96 to 8.23 °C day growthday-1 in BC (local) and 10.28 to 11.87 °C day growthday-1 in ICPL 88039. Seed yield heat use efficiency (HUE) in BC (local) varied from 0.207 to 0.296 kg ha-1 °Cday-1, whereas, in ICPL 88039 it varied from 0.201 to 0.312 kg ha-1°Cday-1 under different sowing dates in both crop seasons. Seed yield heat use efficiency was relatively higher in 2013-14 followed by 2012-13 in both the cultivars which indicated the significant differences in using the heat, available to the plants.

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