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Tamil Nadu Agricultural University (2013)

Implications of intensive farming on land and water resources in tamil nadu

Kavitha V.

Titre : Implications of intensive farming on land and water resources in tamil nadu

Auteur : Kavitha V.

Université de soutenance : Tamil Nadu Agricultural University

Grade : Doctor of Philosophy (PhD) in Agricultural Economics 2013

Résumé partiel
The study aims in finding the influence of intensive farming over land and water resources in Tamil Nadu, with the specific objective of analyzing the influence of intensive farming over dynamics of land use, water table, water quality, crop diversification and technical efficiency of famers over the years in the intensive farming district of Tamil Nadu. For identifying the intensive farming district in Tamil Nadu, composite index was constructed. The index comprised of the indicators such as net irrigated area by tube wells, area irrigated per tube well, area under high yielding varieties of rice and sugarcane, fertilizer consumption per hectare of net area sown and number of tractors used per net area sown. Based on the ranks of composite index, Cuddalore and Villupuram, were identified as most intensive farming districts in Tamil Nadu. For analyzing the objectives, the study utilized secondary data pertained to the period 1980-2010. Since Villupuram district was carved out from Cuddalore district only during 1994, for ease of analysis both the districts were clubbed and hence erstwhile South Arcot district was selected for the entire study. The analysis of dynamics of land use pattern indicates that over the years there has been a decline in the area under several categories of land use. The negative growth trend in barren land, cultivable waste land, permanent pasture land, land under miscellaneous tree crops and other fallow land due to rise in population pressure leads to positive growth in land put to non agricultural use. Current fallows have increased and showing higher growth rate of 2 per cent per annum and the growth rate was negative in the case of net area sown, gross cropped area and area sown more than once. To examine the factors which influence land use pattern, intensive farming variables like area irrigated under tube wells, paddy productivity and sugarcane productivity were included along with other variables like time trend and rainfall. The multiple regression analysis shows that the intensive use of inputs over the years resulted in deterioration of soil quality and thereby development of current fallow lands. The results confirmed that increase in productivity of input intensive crops brings more marginal lands for cultivation, these lands in turn needs more inputs for better productivity. This chain of activities leads to soil deterioration thereby increase in the current fallow lands.

Présentation et version intégrale (Shodhganga)

Page publiée le 18 avril 2021