#IMP_TERMS Blind cultivation The cultivation after planting | Agriculture Exams Library
#IMP_TERMS
Blind cultivation The cultivation after planting and before crop emergence.
Deep tillage soil tilled from the depth of 15-45cm, generally carried out in root crops.
Shallow tillage when soil is tilled up to depth of 2.5 cm to 15 cm.
Ideal tillage soil should be prepared in such a way that the tillage operation carried out to the normal sequences of tillage and upon moisture and type of soil.
Minimum tillage or no-tillage system reduces the availability of potassium due to increased compaction, lessened reaction, lower temperature and positional availability. The concept of minimum tillage was started in USA.
Puddling is ploughing the land with 5-10 cm standing water with an object to create an impervious layer below the surface to reduce deep percolation losses of water and to provide soft seedbed for planting rice.
Percolation: It is the vertical movement of water in the soil due to force of gravity. Percolation occurs when water is under pressure or when the tension is smaller than about 1/2 atmosphere. It occurs in saturated soil.
Seepage: It is the horizontal flow of water in channel or canal is called seepage. Water loss from channel or canal mainly due to seepage.
Permeability: The ability of a soil to movement of air and water is known as permeability. Soils high in clay have small pore spaces, so water passes l through only slowly.
Leaching: Downward movement of nutrients and salts from root zone with the water is called leaching.
Capillarity: Capillarity refers to the energy with which water is held by soil. If a lower end of glass tube of capillary size is placed in water the liquid rises in the tube above the level of the water surface outside.
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