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The present investigation entitled "Impact of biofertilizers and levels of zinc and potassium on growth analytical parameters of potato (Solanum tuberosum L.)" The present experiment was laid out in the experimental field of department of Horticulture, College of Agriculture, Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya, Gwalior (M.P.) during first year (2018 -19), second year (2019 -20) and pooled with 18 treatments of three levels of potassium i.e. 20, 40 and 60 kg/ha, three levels of zinc i.e. 1.5, 3.0 and 4.5 kg/ha and two bio fertilizers, Azotobacter and PSB have been presented in the preceding chapter. The experiment was laid out in Randomized Block Design with eighteen treatments including control and replicated three times each. The observations were recorded on different aspects of dry weight per plant (g), leaf area per plant (cm 2 ), leaf area index, net assimilation rate (mg cm 2-1 day -1 ), days to sprouting and crop growth rate (g m 2-1 day -1 ). The result of experiment revealed that the potassium (60kg/hac) significantly improved growth parameters among all the potassium levels and zinc (4.5kg/hac) was significantly always affected the all growth parameters, whereas biofertilizers PSB enhanced all the growth parameters at different growth stages.

Industrial activities in India are related to major amounts of non-biodegradable solid waste, waste plastic being with the most important. Dumping of plastic waste in an environment is taken into considered to be a big problem because of its very low biodegradability and presence in large amounts. In modern time utilization of such, Industrial wastes from various plastics have been calculated as another substitution of a component of the conventional aggregates. Plastic recycling was taking place on a significant scale in an India. As much as 60 % of both industrial and urban plastic waste is recycled which obtained from various sources. In India plastic wastes is generated on large scale that have large economic value, as a result of this, recycling of waste plastics performs a most important role in offering employment. This study involved experiments and tests to optimize the effectiveness of reuse waste plastic in the manufacturing of concrete. Waste plastic was used as a partial replacement for sand by 0%, 1%, 2%, 3%, 4% and 5% with concrete mixtures. The concrete cubes had been tested at room temperature. These experiments consists performing slump & compressive strength. This investigation assured that utilization of waste plastic as a sand replacement aggregate in concrete provide a good process to decrease the rate of materials and crack some of the solid waste issues disposed by plastics.

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