Soil Test based Fertilizer Recommendation for Mustard (Brassica juncea L.) in Eastern Plain Zone of Uttar Pradesh

Yield Targeting for Rice under SRI on Alfisols of Tamil Nadu through Soil Test based Integrated Plant Nutrition System

“…The order of nutrient requirement in the present investigation was K>N>P. The requirement of K 2 O was 1.31 times higher than N and 2.89 times higher than P 2 O 5 . Similar trend of nutrient requirement for N, P 2 O 5 and K 2 O was also reported by Verma et al, (2017) for mustard and Santhi et al, (1999) for rice. Experiments conducted at Coimbatore have shown that under the same nutrient application level, SRI plants take up more nutrients and produce more grain weight per unit of nutrient uptake (Thiyagarajan and Biksham Gujja, 2013) This nutrient recovery by the plant is due to extensive root systems of SRI plants which remove more nutrients from the soil.…”

“…In the present investigation, the existence of operational range of soil test values for available N, P and K status was clearly depicted from the variation in initial soil available nutrient status which is a prerequisite and underlying principle for calculating the basic parameters and developing fertilizer prescription equations for calibrating the fertiliser doses for specific yield target of rice. Similar type of development of fertility gradient for the existence of operational range of available N, P and K status was reported by reported by Mahajan et al, (2013) for wheat and Verma et al, (2017) for mustard. Due to the application of graded levels of fertilisers, notable fertility variations were recorded in various strips…”

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“…In the present investigation, the requirement of N was higher, which is followed by K 2 O and P 2 O 5 . The requirement of N was 2.62 times higher than P and 1.95 times higher than K. Similar results were recorded by Verma et al [10], Avtari et al [11] and Dhruw et al [12] in production of one quintal of mustard, the requirement of N was more than P and K.…”

Soil Test Based Fertilizer Application Improves Productivity, Profitability and Nutrient Use Efficiency of Rice (Oryza sativa L.) under Direct Seeded Condition

“…An adequate dose of N application, and enhanced absorption and accumulation resulted in higher GY, SY, and uptake (NPK), as also reported by [37]. The possible reason behind the highest TUP being in strip III was attributed to better root proliferation, having a graded Papplication [31,[38][39][40][41]. The higher dose of N application stimulated the vegetative and root foraging capacity, meaning the crops require additional P and K, and increased the TUP in the crops [42][43][44].…”

“…The higher dose of N application stimulated the vegetative and root foraging capacity, meaning the crops require additional P and K, and increased the TUP in the crops [42][43][44]. The highest total potassium uptake by a crop was recorded with strip I to strip III and might be attributed to the higher application of fertilizer potassium [31,41]. Panaullah et al [45] also reported that the majority of potassium uptake was in straw, as compared to grain.…”