plastic limit of soil

Taller plants require about 20 atm. pressure but root pressure has value upto 5 atm. Plants growing in cold, drought or less aerated soil, root pressure fails to appear..

a) Ban on use of plastic bags (below 20 microns thickness) - which are major cause of pollution in cities b) Recycling of plastic wastes to manufacture many 'remake' items c) Ban on deforestation d) Encouraging forest replantation programmes e) Encouraging social and agro fores..

Pollution of Soil Surface - Large quantity of solid wastes like unused and rejected chemicals (like calcium carbonate, magnesium sulphate, ferrous chloride, ferrous oxide, radioactive wastes, fly ashes, sludge, press mud, saw dust, bottles, plastic materials) unwanted industrial..

Urban activities generate large quantities of city wastes including several Biodegradable materials (like vegetables, animal wastes, papers, wooden pieces, carcasses, plant twigs, leaves, cloth wastes as well as sweepings) and many non-biodegradable materials (such as plastic bags, p..

The substances/species produced either by a natural source or by human activity, which cause an adverse effect on the environment on being in excess of a desirable limit, are termed as pollutants. Some common examples of pollutants are carbon monoxide, sulphur dioxide, oxides of nitrogen,..

The exhaustible natural resources are limited in nature and are liable to be degraded in quantity and quality by human activities. Examples are forests, soil, wild animals, minerals, fossil fuels et..

Selection of crops for rotation depends on soil condition, moisture condition, length of rainy season, type of inputs available (irrigation, fertiliser, pesticide, labour and machine power), risk involved, duration of crop (annual, biennial or perennial) and marketing and processing faci..

The following measures should be adopted to control soil pollution: Suitable and safe disposal of wastes including nuclear wastes. Non-biodegradable materials like plastic, glass, metals, etc. should be recovered and recycled. Inorganic pesticides should be replaced by ..

Population grows in geometrical proportions but food grows in only arithmetical proportion. With the ever increasing demand on food grains, fodder, fibre, vegetables, fruit, sugar and oil, there is an urgent need to increase crop production, as our land resources are limited. Our natural..

. The material beyond A and upto 'P' is partly elastic and partly plastic in behaviour. Beyond 'P', the behaviour of the wire is very erratic. There is a large increase in the strain but a very small change in the stress. At this stage, the wire flows down upto the point C. The point 'P',..