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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
    Variation in morpho-agronomic traits of lowland rice (Oryza sativa L.) genotypes of Assam in response to phosphorus fertilization
    (AAU, Jorhat, 2018) Das, Priyanka; Sarma, Debojit
    The present investigation was conducted with twenty-four genotypes (sub-plot) in two phosphorus doses (main plot) in a split-plot design with three replications during the Sali season of 2017 at ICR farm, AAU. The ANOVA for 15 characters studied revealed significant variation between the phosphorus doses (0 and 20 kg P2O5 ha-1) for days to heading and 50% flowering, root length and root volume per hill. A highly significant variation among the genotypes was observed for all the 15 characters. The genotype and phosphorus interaction effects were significant for panicle length, filled grains/panicle, chaffs/panicle, spikelet fertility, 1000-grain weights, root length, root dry weight and root volume. A significant advance in days to heading and 50% flowering along with an enhancement in root length and volume was registered for 20 kg P2O5 ha-1. Based on CD (5%), the superior genotypes with desirable means were Suagmoni for days to heading and 50% flowering, panicle length, chaff per panicle, spikelet fertility, 1000-grain weights and root length; Pankaj for grain yield/hill, harvest index and root dry weight; Dhirendra for days to heading and plant height; Herapoa for filled grains/panicle and shoot dry weight; Local Joha for effective tillers/hill and Gitesh for root volume. Amongst the 24 genotypes, only 7 genotypes namely Herapoa, Gondhi Biroin, Pankaj, Prabhat Sali, Gheu Bora, Betguti-2 and Tulsi Bora were categorized as high performing on the basis of total scores worked out of all the characters. A significant increase at applied phosphorus dose was observed for panicle length in Suagmoni; spikelet fertility in Herapoa, Kokua Bora and Joha Bora; 1000-grain weights in Tulsi Bora, Joha Bora and Aghoni Bora; root length in Suagmoni, Black rice, Kon Joha-M and Harinarayan; root dry weight in Gitesh, Joha Bora, Kon Joha-M and Harinarayan; root length in Gitesh, Joha Bora, Kon Joha-M and Harinarayan and root volume in Suagmoni, Gitesh, Prabhat Sali, Kokua Bora, Tulsi Bora, Aghoni Bora, Kali Jeera, Jowalpool, Kunkuni Joha, Harinarayan and Kon Joha-1 whereas a significant decline in number of chaffs was observed in Joha Bora and Kokua Bora. A higher magnitude of PCV than GCV for grain yield and effective tillers indicated a greater environmental influence on these characters. High estimates of GCV and PCV along with moderate to high heritability and high GA for chaffs/panicle, 1000-grain weights, grain yield, shoot and root dry weights indicated the importance of additive gene actions in the inheritance of these characters. Among the 3 diverse variety groups, glutinous genotypes contained the highest number of high yielding and phosphorus efficient genotypes followed by normal Sali while the aromatic had only intermediate types. The genotype Herapoa proved to be highly phosphorus efficient based on mean grain yield and grain yield efficiency index (GYEI). This study proved the presence of P-efficient genotypes among the rice landraces of Assam to be used in breeding for low input or organic farming.
  • ThesisItemOpen Access
    Biochemical And Neuroendocrinological Studies On Muga Silkworm Antheraea Assama Westwood (Lepidoptera: Saturniidae)
    (Assam Agricultural University; Jorhat, 2001) Das, Priyanka; Unni, B. G.