Browsing by Author "N. De"

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Evaluation of extractability of different extractants for zinc and copper in soils under long-term fertilization
(Institute of Agricultural and Food Information, 2015) Amit Kumar Pradhan; K.S. Beura; R. Das; D. Padhan; G.C. Hazra; B. Mandal; N. De; V.N. Mishra; K.B. Polara; S. Sharma
We aimed to evaluate the extractability of different extractants for zinc (Zn) and copper (Cu) in soils of long-term field experiments covering different agro-ecological zones of India. The relationships between the amounts of Zn and Cu extracted by Mehlich 3, 0.1 mol/L HCl and AB-DTPA (ammonium bicarbonate-diethylenetriaminepentaacetic acid) with those extracted by DTPA, the conventional extraction method widely used in soil testing laboratories in India, were elucidated. The treatments of the long-term experiments included control (no fertilizer), 100% NPK, 50%NPK + 50% N through FYM (farm yard manure) and a fallow soil. Some important physico-chemical properties of soil like pH, organic carbon, textural class, CaCO 3 content, etc. were analyzed. The NPK + FYM treatment was found to be the most effective treatment in terms of increased content of Zn and Cu in soils. The results showed that the amount of Zn and Cu extracted by Mehlich 3 were significantly correlated with that extracted by 0.1 mol/L HCl (r = 0.970** for Zn and r = 0.914** for Cu). Accordingly, Mehlich 3 and 0.1 mol/L HCl could be used effectively for estimating Zn and Cu availability in soils of India. However, Mehlich 3 was superior to all the other extractants used for the study. © 2015, Institute of Agricultural and Food Information. All rights reserved.
Extractable iron and manganese in soil as influenced by management practices in some long-term experiments of India
(IndianJournals.com, 2018) A.K. Pradhan; K.S. Beura; R. Das; D. Padhan; G.C. Hazra; B. Mandal; N. De; V.N. Mishra; S. Sharma; K.B. Polara
[No abstract available]
Soil and Plant Responses to the Application of Ascophyllum nodosum Extract to No-Till Wheat (Triticum aestivum L.)
(Taylor and Francis Inc., 2015) Avijit Sen; V.K. Srivastava; Ram K. Singh; A.P. Singh; P. Raha; A.K. Ghosh; N. De; A. Rakshit; R.N. Meena; Ashok Kumar; Om Prakash; M.K. Ghosh; Marwan Manea; P.K. Upadhyay
A field trial consisting of four granule formulation doses and five liquid formulation sprays of a seaweed extract from Ascophyllum nodosum commercially known as Biovita, along with the recommended dose of nitrogen (N)–phosphorus (P)–potassium (K), was conducted during 2008 and 2009 in BHU, Varanasi, India, to evaluate its effect on wheat (var. HUW 468) under a no-tillage system. Among the granule doses, the 10 kg ha−1 basal application and the two liquid sprays of 500 cm3 ha−1 each at 25 and 50 days after sowing significantly improved the performance of wheat. On an average under these two treatments, the greatest grain and straw yields were observed were 3454.5, 3446.5 and 5187.5, 5220.0 kg ha−1, respectively. The greatest protein content was found when further high doses of extract were applied. A faster decomposition of the paddy residue was also observed as indicated by an earlier decline in carbon (C)/N ratio of the soil in the treated plots. © , Copyright © Taylor & Francis Group, LLC.