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Assam Agricultural University, Jorhat

Assam Agricultural University is the first institution of its kind in the whole of North-Eastern Region of India. The main goal of this institution is to produce globally competitive human resources in farm sectorand to carry out research in both conventional and frontier areas for production optimization as well as to disseminate the generated technologies as public good for benefitting the food growers/produces and traders involved in the sector while emphasizing on sustainability, equity and overall food security at household level. Genesis of AAU - The embryo of the agricultural research in the state of Assam was formed as early as 1897 with the establishment of the Upper Shillong Experimental Farm (now in Meghalaya) just after about a decade of creation of the agricultural department in 1882. However, the seeds of agricultural research in today’s Assam were sown in the dawn of the twentieth century with the establishment of two Rice Experimental Stations, one at Karimganj in Barak valley in 1913 and the other at Titabor in Brahmaputra valley in 1923. Subsequent to these research stations, a number of research stations were established to conduct research on important crops, more specifically, jute, pulses, oilseeds etc. The Assam Agricultural University was established on April 1, 1969 under The Assam Agricultural University Act, 1968’ with the mandate of imparting farm education, conduct research in agriculture and allied sciences and to effectively disseminate technologies so generated. Before establishment of the University, there were altogether 17 research schemes/projects in the state under the Department of Agriculture. By July 1973, all the research projects and 10 experimental farms were transferred by the Government of Assam to the AAU which already inherited the College of Agriculture and its farm at Barbheta, Jorhat and College of Veterinary Sciences at Khanapara, Guwahati. Subsequently, College of Community Science at Jorhat (1969), College of Fisheries at Raha (1988), Biswanath College of Agriculture at Biswanath Chariali (1988) and Lakhimpur College of Veterinary Science at Joyhing, North Lakhimpur (1988) were established. Presently, the University has three more colleges under its jurisdiction, viz., Sarat Chandra Singha College of Agriculture, Chapar, College of Horticulture, Nalbari & College of Sericulture, Titabar. Similarly, few more regional research stations at Shillongani, Diphu, Gossaigaon, Lakhimpur; and commodity research stations at Kahikuchi, Buralikson, Tinsukia, Kharua, Burnihat and Mandira were added to generate location and crop specific agricultural production packages.

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  • ThesisItemOpen Access
    PREVALENCE AND PATHOLOGY OF FLUOROSIS IN CATTLE IN ASSAM
    (Assam Agricultural University, Khanapara, Guwahati, 2013-04) Bonia, Rajib; Baruah, G. K.
    The present investigation was carried out with a view to determine the prevalence and pathology of fluorosis in cattle in Assam. A survey work was undertaken to know the prevalence of fluoride poisoning in cattle in some areas of Karbi Anglong, Nagaon and Guwahati, Assam by visiting door to door to the farmers house in the areas where fluoride content in the water was reported high. The overall prevalence of fluorosis with characteristic clinical symptoms and lesions in cattle in Assam was recorded as 28.63% (268/936) out of which district wise prevalence of fluorosis was 11.85% (111/936) in Karbi Anglong, 9.40% (88/936) in Nagaon and 7.37% (69/936) in Guwahati. Age wise prevalence of fluorosis was recorded as 17.94% (168/936), 5.98% (56/936) and 4.70% (44/936) in calves below one year, 1-3 years and above three years respectively. All the animals affected from fluorosis showed mild to severe dental lesions like yellowish brown pigmentation, irregular wearing and mottling. None of the affected animals showed characteristic signs of osteofluorosis. The values of haemoglobin (Hb) concentration, total erythrocyte count (TEC) and total leucocyte count (TLC) were reduced significantly in all the affected animals compared to healthy animals. The differential leucocyte count (DLC) revealed significant increase of eosinophils in all the affected animals and the neutrophils count though decreased but not significantly. Other cellular counts remained within the normal range. The urine samples of the affected animals showed presence of trace amount of bile pigment and proteins. Glucose, ketone bodies, blood and bile salts were absent. There was significant (P<0.01) variation of fluoride concentration in the serum, urine and milk between healthy and affected animals. Present study also recorded the highest concentration of fluoride in water and soil in Karbi Anglong district whereas the highest concentration of fluoride in forages was recorded in Nagaon district. Out of all the areas surveyed the highest concentration of fluoride in water, forages and soil was recorded in Kheroni areas of Karbi Anglong district. To undertake a systematic study, experimental acute and chronic fluoride toxicity in cattle below one year of age was carried out. Experimental studies on fluoride toxicity revealed variation of symptoms, clinicopathological alterations and the presence of fluoride content in the serum, urine and tissues like liver, kidney, teeth and bone which were in accordance to dose and period of exposure to the fluoride. Gross, histopathological, histochemical and ultrastructural alterations in tissues were also recorded.