Compromising Expensive NPK with Cheapest FYM: Comparative Study of Inorganic NPK Fertilizer and Organic Farmyard Manure effects on Yield Components of Vigna mungo L

There is increased emphasis on the impact on environmental quality due to continuous use of chemical fertilizers. The integrated nutrient management system is an alternative and is characterized by reduced input of chemical fertilizers and combined use of chemical fertilizers with organic materials such as animal manures, crop residues, green manure and composts. The nature and the characteristics of nutrient release of chemical and organic are different, and each type of fertilizer has its advantages and disadvantages with regard to crop growth and soil fertility. Therefore, a balanced fertilization strategy that combines the use of chemical, organic or biofertilizer must be developed and evaluated. The present research work was undertaken to study the effect nitrogen, phosphorus and potassium level on the growth of black gram growing under reduced rate of fertilizer (25% and 50%) compromising with FYM as organic fertilizer. This research was designed to study the effect of using organic and inorganic fertilizer on the growth characteristics, chemical composition of black gram and to assess their potential as alternatives to conventional NPK fertilizer.