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Background: Mung bean (Vigna radiata L.) is an important edible bean in the human diet worldwide. However, its growth, development, and yield may be restricted or limited by insufficient or unbalanced nitrogen (N), phosphorus (P) and potassium (K) fertilization. Under intensive cropping systems, large amounts of K are removed, leading to serious depletion of soil K reserves. Therefore this study was conducted to generate the high yield and to improve yield components via effective and balanced fertilization.Methods: In this field experimentation during 2014-2016 different levels of potassium through soil application and foliar spray were studied. Three locations were selected on the basis dominance of the crops under rainfed condition.Result: In the present experimentation there was a significant effect of potash levels on plant height, number of pods per plant, 100-grain weight and grain yield. Significantly the highest grain yield (1120 kg ha-1) was recorded with 20 kg K2O ha-1, which was at par with 30 kg K2O ha-1. However, the grain yield with 20 kg K2O ha-1 was reported statistically equivalent yield with two foliar spray of muriate of potash (KCL) at flowering and pod filling stage. The pigments responsible for photosynthesis such as chlorophyll was favourably influenced by soil and foliar application of potassium. The K use efficiency parameters of AE, AR, ENUE and VCR were relatively high with potash application @ 20 kg ha-1 thereafter it declines. The positive balance of K is highly predominant in almost all the potassium applied plots which imply that the use of K fertilizers is optimal.

Experiment was conducted to investigate the effects of imazthapyr and quizalofop-ethyl in different doses (50, 75 and 100 g/ha) with two interval (20–25 and 30–35 DAS), hand weeding twice (20 and 40 DAS) in comparison to unweeded control on yield and yield components of French bean during Rabi season of 2009 to 2011 under irrigated condition on Inceptisols. Among herbicides, application of imazethapyr at 100 g/ha at 20 DAS produced lowest weed index and highest weed efficiency and seed yield (1.24 t/ha). Imazethapyr at 100 g/ha at 20–25 DAS gave more economic profit (?28869/ha) followed by imazethapyr at 100 g/ha at 30–35 DAS (?27780/ha). None of the herbicides showed phytotoxicity to crop and was compatible with French bean. Imazethapyr and quizalofop-ethyl at lower concentration did not provide satisfactory weed control in rajmash field.