Nutrient Content and Uptake of Soybean ( L Meril) Glycin max on different Fertility Levels under Guava Based Agri- horticulture System Indian Journal of Ecology (2023) 50(3): 676-680 DOI: https://doi.org/10.55362/IJE/2023/3951 Manuscript Number: 3951 NAAS Rating: 5.79 Abstract: A field experiment was carried out at Banaras Hindu University, Mirzapur in kharif season 2018 to study about effect of different fertility levels on nutrient content and uptake of soybean under guava based Agri horticulture system. There were five fertility levels in a randomised block design. The sources of fertilizers were urea, DAP, MOP and elemental sulphur for N, P O , K O, and S application, 2 5 2 respectively. The variety of soybean was JS-2029, inoculated with rhizobium culture. Among the different fertility levels the application of 50 kg N, 100 kg P O , 60 kg K O, and 40 kg S ha with rhizobium inoculation significantly enhances the nitrogen, phosphorus, potassium and sulphur 2 5 2 -1 content and uptake in grain and straw of soybean. Keywords: Agri Horticulture, Fertility, Guava, Nutrient uptake, Soybean Ankit Pandey, Avijit Sen and Prabhat Tiwari 1 Department of Agronomy, Banaras Hindu University, Varanasi-221 005, India 1 Department of Silviculture and Agroforestry, Rani Lakshmi Bai Central Agriculture University, Jhansi-248 003, India E-mail: ankitforestry21@gmail.com About 42.8 % population of country relies in agricultural sector for their livelihoods, but it is under severe strain condition as an average land holding are steadily declining. In India, each person has access to 0.12 ha of land for cultivation, compared to 0.29 ha worldwide. From recent few decades agriculture become unlikely by farming community because Indian agriculture is so reliant on climate and weather conditions, less remuneration and high-risk involvement, farmers are also dealing with the critical challenges as a result of climate change (Dhyani et al 2016). As a result, a severe risk is anticipated for satisfying the requirement of increasing population for food, fibre, fuel and fodder while also expanding food grain output (Ram et al 2016). However, throughout the previous few decades, there have been a lot of expectations placed on agroforestry's contribution to climate-smart agriculture. Agroforestry is the collective name of land use system where woody perennials are integrated with agriculture crop on same land unit in such a way that is provides sustainable benefits to farmers. Guava, litchi, custard, apple, aonla, mango and bael, are some of the most popular horticulture trees used in agri- horticulture system. Pulses offered the most affordable source of high-quality protein for human beings. In India, where the bulk of the population consumes a vegetarian diet, protein deficiency is a wide spread concern. Soybean is a prominent oil seed as well as pulse crop, grown in various parts of the world. It is an excellent source of protein, can supplement in diet. Soybean has roughly 40-45 percent protein, 18-20 percent edible oil, 24-26% carbohydrate, and 3.0-3.6% ash and also rich source of vitamins and minerals (Morshed et al. 2008). Guava is one of a various perennial fruit tree intercropped for not only to increase revenue but also to improve the use of the land by obtaining improved output and to enhance soil health by preventing soil erosion (Sharma et al 2006). Guava is one of the most significant fruits farmed in India, ranking fourth in terms of production and fifth in terms of area. Guava is great source of nutrients, dietary fibre, pectin, and ascorbic acid. Water (80-82%), protein (0.71%), fat (0.5%), carbohydrate (11-13%), and acids (2.4%) are all present in guava fruit (Uchôa et al 2014, Gupta et al 2018). Phosphorus encourages nodule formation and rhizobial activity in legumes, which aids in nitrogen fixation. Additionally, it contributes to respiration, cell growth and division, energy storage, and photosynthesis (Akter et al 2013). Sulphur is related to nitrogen metabolism and is necessary for the creation of proteins, vitamins, and important amino acids that include sulphur. Considering the above fact in view the present study was conducted to evaluate the suitable combination of nutrient to enhance the nutrient content (%) and uptake (kg/ha) of soybean under guava based agri- horticulture system. MATERIAL AND METHODS The present investigation was carried out during kharif season, 2018-19 at Banaras Hindu University, situated in