Weeds are menace in agriculture. Since two thirds of Indian agriculture is rain-fed farming where usage of herbicide is very limited, weeds have the potential designed to jeopardize the total harvest in the delicate agro ecosystems. Herbicides available in the market are designed to control or kill the above ground part of the weed plants, None the herbicides inhibits activity of viable below ground plant parts like rhizomes or tubers, which act as a source for new weeds in the ensuing season. Soils infested with weed and weeds are likely to procure lower yields than soils where weeds are controlled. Improvements in the efficacy of herbicides through the use of the nanotechnology could result in greater production of crops. The encapsulated nano herbicides are relevant, keeping in view the need to design and produce a nano herbicides that is protected under natural environment and acts only when there is a spell of railfall, which truly mimics the railfed system
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