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Role of legume crop rotation in rice-based cropping sequence in managing soil salinity problem and in maintaining soil fertility and rice productivity in coastal alluvial soil

Introduction  Land and water are the two most vital natural resources of the world and these are under tremendous stress due to the ever increasing biotic pressure. Accelerated land degradation caused by soil erosion, waterlogging, salinization, alkalization, acidification, fertility depletion, physical and biological deterioration affecting about fifty percent of the land area, adds to the(…)

RHA (Rice Husk Ash) in ameliorating soil salinity, alkalinity and acidity

Rice husk is a by-product of the rice milling industry. It is also abundantly available.  Rice husk is a residue produced in significant quantity on a global basis.  While they are used as a fuel in some regions, in other countries they are treated as waste, causing pollution and disposal problems.  Due to growing environmental(…)

Arsenic content of groundwater got reduced through storage in ponds

Arsenic content of groundwater got reduced through storage in ponds

An inventory survey (1998-2000) was conducted on land and water use pattern in  Gotera mauza  under new alluvial zone of the Gangetic delta in West Bengal. The survey revealed that ponds were continuously filled with arsenic contaminated groundwater through peoples’ practice of filling the ponds with Tubewell water in non-rainy periods mainly during pre-monsoon (April(…)

In quest of a pattern in annual rainfalls

Heat from the sun vis-à-vis evaporation and rainfall: Cause and effect Sun is the source of all energies. Heat  from the sun is the driving force in the earth’s hydrological cycle. It is due to the attraction of the sun that earth and the other planets move in their respective orbits. The amount of heat(…)

Mauza wise water conservation

Mauza wise water conservation

Mauza wise or village wise water conservation is hydrologically proved to be the most beneficial method for conserving rainwater as excess surface run-off from an area or watershed. http://water-soil.org/hydrological-balance-planning-irrigation-coastal-areas This method of rainwater conservation is very much useful where annual rainfall is sufficient enough to fill the dugouts. Natural low depression points are generally selected(…)

Fringe areas greatly influence the development of the Sunderbans

Fringe areas greatly influence the development of the Sunderbans

Either of the expansion of conventional agriculture in the community development block or the development of the forest by itself can not exclusively address the problems of Sunderbans Biosphere Reserve (SBR). Only the development of fringe areas can claim to have a solution for the development of SBR. This is because the total character of(…)

Prediction of Drought and Flood years using length of runs of annual rainfalls

While working on prediction of drought and flood years we are always making judgements and decisions on the basis of incomplete information, but this is preferable to decisions based on no information at all. In this light, we do statistical predictions of future rainfall. Predictions of future amount of  rainfall can be made at least(…)

Agroclimatic analysis for onset of agricultural drought period in a coastal area

Agroclimatic analysis for onset of agricultural drought period in a coastal area

    Studies on air temperature are necessary for assessing climatic conditions favourable for growing crops and also for altering the cropping pattern, if necessary, on the basis of hydrological balance in a particular area. Contai (21 ̊47´.15 N Lat ) coastal area by the northern shore of the Bay of Bengal is a well(…)

Water harvesting in coastal and deltaic region

Water harvesting in coastal and deltaic region

Water harvesting in coastal and deltaic regions is the basic and problematic task for any other developmental works in these areas. The problem further intensifies with the ingress of sea water in rivers, channels and groundwater. Water harvesting in suitably designed ponds, mixed farming with agroforestry and fish farming may rule out the complexities to(…)