Lesson 8 Special Drainage Situations 8. However, some agricultural areas are sloping. Hence, the question arises: can equations for flat lands be applied to sloping lands? When a hillside is drained by a series of parallel drains, the situation is as shown in Fig. The highest water table height h , above the drain level is now not midway between the drains, but is closer to the downslope drain.
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When the conditions are so created that the crop root-zone gets deprived of proper aeration due to the presence of excessive moisture or water content, the tract is said to be waterlogged.
The water logging affects the land in various ways. The various after effects are the following: 1. Growth of Water Loving Wild Plants 3. Impossibility of Tillage Operations 4.
Accumulation of Harmful Salts 5. Lowering of Soil Temperature 6. Reduction in Time of Maturity So, the excess water content on the surface and in the crop root zone should be removed properly for the healthy growing of plants and to maintain the soil fertility.
Drainage refers to the removal of excess water from the ground surface as well as from the subsurface soil to facilitate the proper growth of plants and to avoid the hazards due to water logging. It can be done by using tile drains or mole drains in clay soil. Irrigation refers to the application of controlled amounts of water to plants at needed intervals. There are different methods of irrigation including surface irrigation, subsurface irrigation, drip and sprinkler irrigation.
Drip irrigation is proved to be the most efficient among all the methods of irrigation, as it allows water to drip slowly to the root zone of the crop.
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When the conditions are so created that the crop root-zone gets deprived of proper aeration due to the presence of excessive moisture or water content, the tract is said to be waterlogged. The water logging affects the land in various ways. The various after effects are the following: 1. Growth of Water Loving Wild Plants 3. Impossibility of Tillage Operations 4. Accumulation of Harmful Salts 5. Lowering of Soil Temperature 6.
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Akidal Amazon Music Stream millions of songs. Cover has very slight wear on edges and corners. Spine is tight and sound. Revision of Edition. Withoutabox Submit to Film Festivals. Most of the formulas for flow into auger holes and drain tubes are explained.