Fly ash (FA) is a coal combustion by-product of brick kiln, thermal power and incineration plants operated either based on coal and biomass or industrial solid waste. It creates environmental problems attached with their unfair utilization and problems of disposal. The growing of environmental awareness and increasing energy and material requirement will foster recycling. The Ministry of Environment, Forest and Climate Change (MoEF&CC) and Pollution Control Board (CPCB) have prepared guidelines for utilization of FA in agriculture as soil ameliorant and modifier. Recycling will promote reuse of precious materials which would otherwise be wasted and alleviate energy consumption and greenhouse gas emissions from extraction and processing. FA has potential to serve as fertilizer for improving the soil textures at optimum amount. The main purpose of this work was to use the pollutant as fertilizer. Present work was done to study the effect of FA on some biochemical and morpho-physiological properties and yield of V. unguiculata. From the obtained results after statistical analysis of data, it can be evinced that the use of FA in lower amount (25 g/m²) has sufficient quantity of macro- and micro-nutrients, which appear to be useful for the plant growth and yield of V. unguiculata, but higher amount (50, 100 g/m²) of FA showed detrimental impact on plant. The low concentration of FA improves the structure, texture of the soil which enhances the fertility of soil. So, FA can be used as a fertilizer for the enhancement of growth and yield of cow pea.

粉煤灰（FA）是砖窑，火力发电厂和焚烧厂的煤燃烧副产品，其运行方式是基于煤和生物质或工业固体废物。它造成环境问题，这些问题与不正当利用和处置问题有关。环保意识的提高以及能源和材料需求的增加将促进回收利用。环境，森林与气候变化部（MoEF＆CC）和污染控制委员会（CPCB）制定了农业中FA作为土壤改良剂和改良剂的使用指南。回收将促进贵重材料的再利用，否则这些贵重材料将被浪费，并减少能源消耗和提取和加工产生的温室气体排放。FA有潜力作为肥料，以最佳量改善土壤质地。这项工作的主要目的是使用污染物作为肥料。目前的工作是研究FA对某些生化和形态生理特性及产量的影响。V. unguiculata。从对数据进行统计分析后获得的结果可以证明，使用少量（25 g / m ²）的FA具有足够的大量和微量营养素，这似乎对植物的生长和生长非常有用。芒草的产量，但较高的FA含量（50、100 g / m ²）对植物有不利影响。低浓度的FA改善了土壤的结构，质地，从而增强了土壤的肥力。因此，FA可用作提高a豆生长和产量的肥料。