Question

Which area effected by soil erosion in andrapradesh?

Answer 1

mmediate advantage of it, is that a well defined conservation objective can be formulated to a acceptable level ensuring safe and economic use of the land. With this objective, the National Bureau of Soil Survey and Land Use Planning, Regional Centre, Bangalore and Research Centre, Bellary of Central Soil and Water Conservation Research and Training Institute, Dehradun in collaboration with Department of Agriculture, Government of Andhra Pradesh, have undertaken the task of quantification of soil Joss in the state of Andhra Pradesh using Universal Soil Loss Equation. The present study is based on the data generated through Soil Resource Mapping of Andhra Pradesh. The data on potential soil loss and their spatial disu·ibution indicated that about 32 per cent area has slight soil loss «5t1ha/yr), 27 per cent area moderate soil loss (5-10 tlha/yr), J 3 per cent area strong soi l loss ( lO- 15 t/ha/yr), 7.5 per cent area severe soil loss ( 15-20 t/ha/yr), 12.5 per cent area very severe soil loss (20-40 tlhal yr) and about 6.5 per cent area has extremely severe soil loss (>40 t/halyr). In Andhra Pradesh. it is observed that about 7.3 M ha (26.6%) area suffers from severe soil loss, (exceeds the tolerance limit of 12.5 tlhalyr) mostly concentrated in Cuddapah, Adilabad, Yisakhapatnam, Chittoor, Anantapllr, Nizarnabad and Vizianagaram districts. The total soil loss in the area will be of the order of about 26 M tonnes which contributes to 72 per cent of the total soil loss in the state. About 35.6 M tonnes of surface soil is lost every year in different regions of the state with a range varying from 9.6 M tonnes to 49.5 M tonnes per year. This leads to a huge amount of nutrient loss in a year. The potential soil loss data thus suggests that there is an urgent need for initiating soil conservation measures in the state. The potential soil loss data indicated that about 59 per cent area in the state can be managed with minimum management practices like field bUflding or proper land cover through crop planning. About 21 per cent area can be conserved through contour bunding and appropriate vegetative barriers. The remaining area of 19 per cent is mostly affected by very severe and extremely severe soil loss. These areas are very fragile and needs utmost care for management. With the participatory approach by the people, these areas could either be brought under natural vegetation or growing erosion resistant crops, contour trenching or bench terracing techniques to prevent further soil loss. Based on severity of soil loss, the areas in the state were given priority rating from I to IY for the purpose of taking up soil and water conservation measures on priority basis. About 17 lakh ha (6.4%) area suffers from a soil loss of more than 40 t/halyr, 33 lakh ha ( L2.3%) area between 20-40 t/ha/yr, 20 lakh ha (7.4%) area between 15-20 tlhalyr and about 196 lakh ha (73%) area suffers from a soil loss of less than 15 t/ha/yr. Soil and water conservation measures recommended for varied rainfall, soil and slope situations under different agroclimatic zones are indicated. The suggested conservation measures will not only help in minimising soil loss but also help in increasing the agricultural production on a sustainable basis. 1