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KrishiSewa - Agriculture Knowledge for Indian Farmers

नत्रजन Tag

06 Oct

Posted at 10:37h in Soil & Fertilizers
Ravinder Kumar 19 views

सटीक नाइट्रोजन उर्वरक प्रबंधन के लिए आधुनिक उपकरण और तकनीक Food production is commensurate with fertilizer usage. Among the three major fertilizers, nitrogen, phosphate and potassium, application of nitrogenous fertilizers is the maximum. It is reported that China, India and Pakistan together consume approximately 70% of nitrogen fertilizer consumed globally. These figures of nitrogen fertilizer consumption point towards emerging environmental pollution issues. The estimated food production demands would require application of N fertilizer to the tune of 116.0 million tonnes in 2016 and 58% of it would be required in Asia alone of which India’s share would be 30% (FAO Report, 2012). The consumption of N fertilizer in form of urea has increased many folds after green revolution in India which is mainly due to lacunae in soil testing facilities for a large number of small-holder marginal farmers which are mostly unaware about modern tools and techniques. The only guiding tool for the farmers is their own wisdom while applying urea and other pesticides and inputs. Often they end up following wrong package of practices as they have no scientific tools to measure what the soil is deficient in. India imported about 10.24 million tonnes (about 41% of total consumption) of fertilizer nutrient NPK in 2008-09 as against 1.93 million tonnes in 2002-03.India produces 10% of world...

10 May

Posted at 08:22h in Soil & Fertilizers
Pradeep Kumar 14 views

मिट्टी में उर्वरकों का प्रबंधन The fertilizers are becoming costly input day by day. Hence it is felt necessary to study the efficient use of this input. So some important points are given here to increase fertilizer use efficiency and to get higher yield. 1. Management of Nitrogen fertilizers in soil Nitrogen is lost from fertilizers by ways as follows: Volatilization Ammonia volatilization is an economic loss to the farmer in terms of both drained fertilizer prices and decreased crop yields. Some important facts are as follows: The ammonia volatilizing capacities of the fertilizers are graded as urea > ammonium sulphate > ammonium chloride > ammonium nitrate. The ammonia volatilizing capacities of the soils are graded as calcareous soil > alkaline soil > neutral soil > acid soil. In neutral and acid soils, ammonia volatilization occurs from urea only, not from other ammonium fertilizer viz. ammonium sulphate, ammonium chloride, ammonium nitrate. Surface application of fertilizers increases ammonia volatilization. Ammonia volatilization from urea added to the surface of warm and moist alkaline or calcareous soils can be completed within a week. To reduce volatilization loss of nitrogen, few recommendations are enlisted hereunder. Immediately after application (within a few hours), urea must be incorporated with soil by tillage or washed into the soil. Urea should never be left on the soil surface without incorporation.  In...

07 May

Posted at 07:21h in Soil & Fertilizers
K.Venkatesh 27 views

नाइट्रोजन उर्वरकों के सुरक्षित और लाभदायक उपयोग के लिए सर्वश्रेष्ठ प्रबंधन पद्धतियां Indian agriculture has witnessed a tremendous fourfold increase in food production over the past three decades. This enhanced food grain production later known as ‘green revolution’ could be mainly attributed to the introduction of high-yielding, input responsive cultivars of wheat and rice in the mid-1960s and to the increased availability and use of chemical fertilisers, especially the nitrogenous (N) fertilizers. Nitrogenous fertilizers supply N which is very essential for plant growth and development and mainly supplied to the crop plants in the form of urea, Diammonium phosphate (DAP) etc. When N fertilizers are used correctly they are very beneficial, but unscientific practices of their usage could lead to large scale pollution and harmful effects on environment. Both surface and groundwater are very vulnerable to No3- contamination by excess use of N fertilizers. Protecting the water bodies in particular and environment in general from No3- contamination is major concern. Therefore here we discuss the best management practices for safe and economic use of Nitrogenous fertilizers. Always apply fertilizers based on soil nutrient status Fertilizers should be applied only based on the soil nutrient status, which can be known by testing the soil at a laboratory. Nowadays all state department of agriculture district headquarters...