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Stability of Zn-EDTA over That of Zinc Sulphate in Soils

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Stability of Zn-EDTA over That of Zinc Sulphate in Soils

A Production Inventory Model with Shortages, Fuzzy Preparation Time and Variable Production and Demand

国际农业工程大会

作者： Tanmoy Karak uttam kumar Singh D.K.das Visiting Scientist Department of Soil and Water Sciences College of Resources and Environmental Sciences China Agricultural University No.2 West Yuanmingyuan Road Beijing-100094 P.R.China. Visiting Scientist Department of Soil and Water Sciences College of Resources and Environmental Sciences China Agricultural University No.2 West Yuanmingyuan Road Beijing-100094 P.R.China. Professor Department of Agricultural Chemistry and Soil Science Faculty of Agriculture Bidhan Chandra Krishi Viswavidyalaya Mohanpur-741252 Nadia West Bengal India

＜正＞ Zinc （Zn） is one of the essential micronutrients required for growth and development of crops. It plays an important role in different plant metabolism process like development of cell wall, respiration, photosynthesis and other bio-chemical functions etc. As much as around 40% of soil samples analyzed throughout all districts of West Bengal have been found to be deficient in Zn. The problem seems to be more acute for rice as around half of the total rice areas found

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American Journal of Operations Research 2012年第2期2卷 183-192页

作者： Nirmal kumar Mahapatra uttam kumar Bera Manoranjan Maiti Department of Applied Mathematics Vidyasagar University Midnapore India Department of Mathematics Bengal Institute of Technology & Management Santiniketan India Department of Mathematics Panskura Banamali College Panskura India

A production inventory model is formulated for a single item. Here, demand varies with the on-hand inventory level and production price. Shortages are allowed and fully backlogged. The time gap between the decision and actual commencement of production is termed as “preparation time” and is assumed to be crisp/imprecise in nature. The set-up cost depends on preparation time. The fuzzy preparation time is reduced to a crisp interval preparation time using nearest interval approximation and following the interval arithmetic, the reduced problem is converted to a multi-objective optimization problem. Mathematical analysis has been made for single objective crisp model (Model-I). Numerical illustration have been made for both crisp (Model-I) and fuzzy (Model-II) models. Model-I is solved by generalized reduced gradient technique and multi-objective model (Model-II) by Global Criteria Method. Sensitivity analyses have been made for some parameters of Model-I.

关键词： Fuzzy Preparation Time Interval Number Multi-Objective Global Criteria Method

Characterisation of Landscape with ForestFragmentation Dynamics

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Journal of Geographic Information System 2011年第3期3卷 242-253页

作者： T. V. Ramachandra uttam kumar 不详

Land cover (LC) and land use (LU) dynamics induced by human and natural processes play a major role in global as well as regional patterns of landscapes influencing biodiversity, hydrology, ecology and climate. Changes in LC features resulting in forest fragmentations have posed direct threats to biodiversity, endangering the sustainability of ecological goods and services. Habitat fragmentation is of added concern as the residual spatial patterns mitigate or exacerbate edge effects. LU dynamics are obtained by classifying temporal remotely sensed satellite imagery of different spatial and spectral resolutions. This paper reviews five different image classification algorithms using spatio-temporal data of a temperate watershed in Himachal Pradesh, India. Gaussian Maximum Likelihood classifier was found to be apt for analysing spatial pattern at regional scale based on accuracy assessment through error matrix and ROC (receiver operating characteristic) curves. The LU information thus derived was then used to assess spatial changes from temporal data using principal component analysis and correspondence analysis based image differencing. The forest area dynamics was further studied by analysing the different types of fragmentation through forest fragmentation models. The computed forest fragmentation and landscape metrics show a decline of interior intact forests with a substantial increase in patch forest during 1972-2007.

关键词： Land Cover Algorithms ROC Curve Spatial Change Correspondence Analysis Forest Fragmentation

Effect of Land Use Changes on Carbon Stock Dynamics in Major Land Use Sectors of Mizoram, Northeast India

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Journal of Environmental Protection 2018年第12期9卷 1262-1285页

作者： Soibam Lanabir Singh uttam kumar Sahoo Anudip Gogoi Alice Kenye Department of Forestry School of Earth Sciences & Natural Resource Management Mizoram University Aizawl India

Land use change activities have greatly affected the total ecosystem carbon stock (TECS) and also contribute to global change through emission of greenhouse gases. The present study assessed the change in vegetation biomass carbon stock (VBCS) and soil organic carbon stock (SOCS) following conversion in major land use sectors (agriculture, agroforestry, forest and plantation) in Mizoram, Northeast India. SOCS was the highest in agroforestry (50.85 Mg C ha-1) and the lowest in agriculture (33.99 Mg C ha-1). VBCS was the highest in plantation (131.66 Mg C ha-1) and the lowest in agriculture (7.44 Mg C ha-1). The highest positive TECS change rate was observed when agriculture was converted to plantation (6.61 Mg C ha-1·yr-1), while negative rate of change in carbon stock was observed following the establishment of agriculture from other land use. A positive rate of change was observed in both VBCS and SOCS with TECS rate of 3.58 Mg C ha-1·yr-1 when agriculture got converted to agroforestry. The absolute carbon stock change rates were higher in VBCS than SOCS signifying the importance to maintain tree based vegetation cover.

关键词： Land Use Change Soil Organic Carbon Stock Vegetation Biomass Carbon Stock

Assessment of Growth, Carbon Stock and Sequestration Potential of Oil Palm Plantations in Mizoram, Northeast India

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Journal of Environmental Protection 2018年第9期9卷 912-931页

作者： Soibam Lanabir Singh uttam kumar Sahoo Alice Kenye Anudip Gogoi Department of Forestry School of Earth Sciences & Natural Resource Management Mizoram University Aizawl India

A study was conducted to assess growth, carbon stock and sequestration potential of oil palm plantations along a chronosequence in Mizoram, Northeast India for which a total of 148 oil palms drawn from different age group plantations (1 to 11 years) were sampled for their biometric parameters and assessment of carbon stock through partial non-destructive methods. All the growth parameters of oil palm (trunk height, crown depth, total height, trunk diameter) and biomass drew from different parts of the palm showed a significant (p belowground biomass (BGB) > standing litter biomass > deadwood biomass > understorey biomass. AGB, BGB and deadwood biomass followed an increasing trend while understorey biomass decreased with age. An 11-year oil palm plantation accumulated 111.96 Mg ha-1 biomass with a carbon density of 49.90 Mg C ha-1 and could sequester 3.70 Mg C ha-1 year-1 in 10 years after planting in Mizoram, Northeast India. The findings showed considerable carbon storage with comparative higher values in oil palm plantations than shifting cultivation fallows. This will enable policy and decision makers in framing climate change mitigation and adaptation policies regarding the extension of oil palm plantations in Mizoram.

关键词： Oil Palm Above Ground Biomass Carbon Stock Carbon Sequestration Potential Northeast India

Yield Response of Direct Seeded <i>Aus</i>Rice Varieties under Rainfed Condition

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American Journal of Plant Sciences 2018年第3期9卷 416-434页

作者： uttam kumar Ghosh Md. Arifur Rahman Khan M Abdul Karim Md Anamul Haque Department of Agronomy Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur Bangladesh

Rainfed Aus rice is a popular conventional rice cultivation technique that through appropriate variety selection can accelerate the benefits of the farmer. On this context, an experiment was carried out at the research field of Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur1706 from April to August in 2014 to evaluate yield performance of some Aus rice varieties under rainfed condition. The experiment was laid out in a split plot design with three replications. The experiment consisted of two sets of treatments: water regime as irrigated (irrigation when necessary) and rainfed (dependent on rainfall) in the main plot and 15 varieties into sub-plots. It was revealed that yield and yield contributing characters were significantly influenced by water regime, variety and their interaction. The traits like number of effective tillers and non-effective tillers·hill-1, number of filled grains and unfilled grains panicle-1, panicle length, test weight, grain yield and harvest index were higher in irrigated crops compared to rainfed. Considering the performance of yield, the highest grain yield recorded in BRRI dhan27 (irrigated-2.47 t·ha-1 and rainfed-2.26 t·ha-1) followed by BRRI dhan55 (irrigated-1.95 t·ha-1 and rainfed-1.88 t·ha-1), BRRI dhan48 and BRRI dhan43 under both irrigated and rainfed treatment. BRRI dhan27 ranked the top under both irrigated and rainfed conditions, however the relative yield was maximum in BRRI dhan55 (reduction was only 3.59%) followed by Nerica10. Hence, considering the yield stability and absolute yield performance, BRRI dhan27 may be considered favorably cultivable for Aus season in Bangladesh followed by BRRI dhan55, BRRI dhan48 and BRRI dhan43.

关键词： Irrigation Rice Varietal Performance Nerica Relative Yield

Forest Dwellers’ Perception on Climate Change and Their Adaptive Strategies to Withstand Impacts in Mizoram, North-East India

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Journal of Environmental Protection 2018年第13期9卷 1372-1392页

作者： uttam kumar Sahoo Soibam Lanabir Singh Snehasudha S. Sahoo Lal Nundanga Lal Nuntluanga Angom S. Devi John Zothansiama Department of Forestry Mizoram University Aizawl India Indian Institute of Science Education & Research Kolkata India Department of Environmental Science Mizoram University Aizawl India

We studied the perception of forest-dependent communities on climate change with its associated risk and their adaptation strategies in Mizoram, Northeast India. A total of 360 respondents (household heads) were randomly selected from 24 villages across the three different agro-climatic zones prevalent. The community perceived awareness of climate change phenomena in the region with a positive correlation between age, education and occupation of the respondents. The overall perception of climate change in temperature was medium (0.49), while low for change in precipitation (0.26) and seasonal durability (0.23). The community showed over-all low score of perception on risk of climate change (0.10) where risk on livelihood and socio-economic factors was higher than risk to environment or forest. Perception on impact of climate change was high for forest abi-otic ecological factors (0.66) and flora and fauna (0.62), while medium on livelihood of forest-dependent communities (0.44). The majority (more than 75%) of the respondents agreed that human beings are involved and responsible for climate change. Adoption of adaptive strategies to cope climate change ranged from 0.07 to 0.91, amongst which zero tillage, use of traditional knowledge, forest fire prevention, soil and water conservation techniques, agroforestry practices and social forestry are popular. However, rain water harvesting and investments for crop insurance were adopted on low scores clearly implied by the educational and socio-economic status of the farmers in the majority. The study brings out the knowledge and perceptions to climate change by forest-dependent communities and their adaptive strategies to cope had been assessed. The finding results seek the attention of researchers and policy makers to integrate technological and financial interventions in supporting farmer’s effort to cope with climate change with a long term objective for improving their livelihood and climate sensitive resources at the

关键词： Perceptions Climate Change Adaptation Forest Policy Northeast Indi

Studies on Water Absorbency of Polyacrylamide Hydrogels

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材料科学与工程（中英文B版） 2015年第11期5卷 399-405页

作者： Bhadani Reena Mitra uttam kumar Department of Chemistry Ranchi Women's College Ranchi University Ranchi-834001 India Department of Chemistry Gossner College Ranchi University Ranchi- 834001 India

The polymerization was carried out under the different concentrations of acrylamide and crosslinker in an aqueous solution of NO2 gas as initiator at 50 oC. The resulting polyacrylamide was saponified with NaOH solution. The hydrolysed polymers show high degree of water swelling (> 500) than that of unhydrolysed polymers (< 100). Swell ability of the gel decreases with the increasing concentration of N, N"- methylene bisacrylamide – a crosslinker which enhances the degree of crosslinking in the polymer chains. The increased crosslinking restricts the expansion of polymer network which causes the lowering of the water absorbency. It was observed that polymer hydration increased with the molar mass of polyacrylamide. The swell ability of polyacrylamide hydrogels is greatly lowered by the addition of ionic salts in the swelling medium. Both ionic strength and valency of the salts are responsible to decrease the water uptaking capacity of the gels which remain unaffected by nondessociating nature of urea. The hydrogels, so prepared, are stable and quite able to undergo swelling - deswelling cycles suggesting their reversible characters.

关键词：聚丙烯酰胺水凝胶吸水性能亚甲基双丙烯酰胺聚合物链吸水膨胀 NaOH溶液凝胶能力离子强度

Minimization of Phenols and Phenolic Compounds in Pulp and Paper Industries： Biological Approaches

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Journal of Chemistry and Chemical Engineering 2011年第7期5卷 595-607页

作者： Manoj kumar Ghosh uttam kumar Ghosh Samit kumar Department of Paper Technology Indian Institute of Technology Roorkee Saharanpur Campus Saharanpur 247001 U.P. India

The liquid effluents released from several industries including the pulp and paper industries contain phenol and phenolic compounds. The hazardous phenols and their chlorinated phenolic derivatives from pulp and paper industries bear the potential to exert deleterious effects on the human health and aquatic ecosystems, if they are released untreated in the environment. Biodegradation of phenolic compounds in the effluent streams from pulp and paper industries is an important eco-friendly method for the removal of toxicity in industrial waste water, while the minimization of formation of these toxic compounds require several in-plant biotechnological techniques such as biopulping and biobleaching. Present paper reviews, the biochemical pathways involved in degradation of phenols and chlorophenols through microorganisms. Various biotechnological strategies involved in minimization and biodegradation of phenol and phenolic compounds and their related environmental engineering aspects such as utility of different bioreactor configurations have been discussed for the treatment of pulp and paper mill effluents.

关键词：酚类化合物造纸工业纸浆生物方法酚类物质植物生物技术微生物降解水生生态系统