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KrishiSewa - Agriculture Knowledge for Indian Farmers

fertilizer use efficiency Tag

27 Jul

Posted at 09:31h in Resource Management
Sunanda Biswas1*, B. H. Gawade2 and Priya Singh1 19 views

उर्वरक दक्षता और कृषि लाभप्रदता बढ़ाने के लिए साइट विशिष्ट पोषक तत्व प्रबंधन (SSNM) Agriculture is the major land use across the globe. The sustainability of our world depends fundamentally on nutrients. Most of the agricultural production system worldwide facing the insufficient access to nutrients still limits food production and contributes to land degradation.  Adoption of precision technologies for more efficient use of resources and nutrients becomes more relevant in the current production scenario. Site-specific nutrient management (SSNM) involving use of inorganic or organic sources along with spatial and temporal soil variability, crop requirements of nutrients and cropping systems, soil capacity to supply nutrients, utilization efficiency of the nutrient and productive capacity of the varieties with improved NUE is the most ideal system that needs to be practiced to achieve the targeted goals. Principles of SSNM: SSNM is an approach to feed crops with nutrients as and when needed. The application and management of nutrients are dynamically adjusted to crop needs of location and seasons. There are five cardinal principles of SSNM: Principle 1- balanced fertilization based on crop requirements Principle 2- plant based estimation of root nutrient supplies Principle 3- need based fertilizer N management Principle 4- sustainable P & K management Principle 5- increasing profitability Important Features of SSNM: Optimal use of existing indigenous nutrient sources such as crop...

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...

27 Apr

Posted at 08:36h in Soil & Fertilizers
9 views

Fertilizers use efficiency to increase profit उर्वरको का सही समय व सही तरीके से उपयोग निष्चित ही इसकी उपयोग क्षमता बढ़ाता हैं। परिस्थिति अनुसार व फसल अनुसार उर्वरक देने से उपज मे भारी वृध्दि होती हैं। फसल की आवष्यकता के तत्वों को फसल में देने का अलग - अलग समय निम्नानुसार हैं। नत्रजन :- पौधो को नत्रजन की आवष्यकता वृध्दि के आरम्भ मे कम वृध्दि के समय अधिक व वृध्दिकाल व परिपक्कता के समय के बीच कम होती। अत: नत्रजन के उर्वरक की कुछ मात्रा बुआई के समय व शेष मात्रा वृध्दिकाल तक देते हैं।जो फसलें 4-5 महीने में पकती हैं उनको नत्रजन की कुल मात्रा दो बार में, जो 9 - 12 महीने में पकती है 3 - 4  बार में और जो इससे अधिक समय खेत मे खड़ी रहती है जैसे गन्नो की अधसाली फसल, नत्रजन की कुल मात्रा 4-5 बार में देते है। रेतीली मृदाओं मे नत्रजन की मात्रा को कई बार में देना आवष्यक है।फास्फोरस :- पौधों में फास्फोरस की आवष्यकता प्रारम्भ में ही जड़ों की वृध्दि के लिये होती हैं। जब पौधे अपनो कुल शुष्क भार का 1/3 हिस्सा तैयार कर लेते हैं। उस समय तक फास्फोरस की कुल आवष्यकता का 2/3 भाग मृदा से ग्रहण करते हैं। अत: फास्फोरस की कुल मात्रा फसल की बुआई के समय ही खेत...