Browsing by Author "A. Rakshit"

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EFFECTS OF CHEMICAL FERTILIZER, FYM AND BIO-INOCULANTS ON NUTRIENT CONTENT, UPTAKE AND QUALITY OF WHEAT (TRITICUM AESTIVUM L.)
(Bangladesh Botanical Society, 2021) Hanuman Prasad Parewa; J. Yadav; V.S. Meena; A. Rakshit
Effects of different levels of chemical fertilizer, farmyard manure (FYM) and bio-inoculants on nutrient content, uptake and quality parameter of wheat were studied. Results indicated that increasing levels of chemical fertilizer, FYM and bio-inoculants significantly enhanced nutrient content and uptake by wheat, while quality parameters of wheat showed significant results with bio-inoculants application. Maximum N, P and K content and their uptake in grain (80.3, 11.07 and 25.29%, respectively) and straw (32.18, 7.14 and 95.92%, respectively) were noticed with 100% NPK over control. Application of FYM @ 10 t/ha significantly increased nutrient content (NPK) in grain and straw and their uptake over the control. The total N, P and K uptake by wheat were found to be maximum 80.97, 12.68 and 86.10 kg/ha, respectively with the application of FYM over control. Combined use of fertilizer levels and FYM, and combined use of fertilizer levels and bio-inoculants significantly increased the nutrient uptake by wheat. © 2021 Bangladesh Botanical Society. All rights reserved.
Indigenous materials for improving water quality
(Technoscience Publications, 2016) S. Sivaranjani; A. Rakshit
In rural areas, most people rely on private water supplies such as wells and dugouts. Quality water is vital to the social, health, and economic well-being of people. It sustains ecological processes that support native fish population, vegetation, wetlands and bird life. Water quality is commonly defined by its physical, chemical, biological and aesthetic characteristics. Presently, there are no appropriate low-cost technologies available for removal of several contaminants present in groundwater. Microbial degradation, chemical oxidation, photolysis and adsorption are used for the treatment of wastewater. Although aluminium is the most commonly used coagulant in the developing countries, studies have linked it to the development of neurological diseases. There are several methods used for the purification of water. Activated carbons are the most common adsorbent, and they are made from different plants, animal residues and bituminous coal. Moringa oleifera seeds are also used as a primary coagulant in drinking water clarification and wastewater treatment due to the presence of a water-soluble cationic coagulant protein, which is able to reduce turbidity of the treated water. There are many other species like Vigna unguiculata, Voandzeia subterranea, Arachis hypogaea, Vicia faba and Parkinsonia aculeata, which are also used for purification of water for drinking and cooking purposes while wood ashes are mainly used for clarifying water for activities such as laundry, bathing, washing utensils but very rarely for drinking. Hence, there is an urgent need for development of alternative, cost effective and also environmental friendly coagulants to address the issue.
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.
Study on removal efficiency of blended coagulants on different types of wastewater
(Technoscience Publications, 2017) S. Sivaranjani; A. Rakshit
The conventional methods of water treatment involve various water clarification processes which include coagulation, flocculation, sedimentation and disinfection. Coagulation is a critical step in water treatment because it involves removing the colloidal particles as well as pathogens that are often attached to the particles. These methods are often not suitable because of the high cost and low availability of chemical coagulants and disinfectants. Synthetic coagulants are not always available at a reasonable price and can leave undesirable residues in treated water. In the present study, the removal efficiency of Moringa oleifera and alum were compared using different types of wastewater. The efficacy of two coagulants has been tested based on some critical parameters including dosages of coagulant, pH, EC, TDS, hardness, DO and COD of turbid water and change in values of these parameters in finished water. These coagulants obviously possessed positive coagulation abilities. There are about nine treatments with one control been used for the study. From the observed results, the blended coagulant MO: (Al2(SO4)3 treatments T7(25:25) and T8(50:50) dosage ratio gives better removal efficiencies with respect to pH, EC, TDS, hardness, DO, COD, Na and K, and appears to be suitable for treatment of wastewater, when compared with other dosages.