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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
    INTEGRATED NUTRIENT MANAGEMENT IN YELLOW SARSON - GREENGRAM CROPPING SYSTEM UNDER RAINFED CONDITION
    (2016) Gogoi, Bebi; Ojha, N. J.
    A field experiment entitled “Integrated nutrient management in yellow sarson - greengram cropping system under rainfed condition” was carried out at the Instructional-cum-Research farm of Assam Agricultural University, Jorhat during two consecutive rabi (Oct-Feb) followed by summer (Feb-May) seasons of the year 2017- 2018 and 2018-2019. The experiment was laid out in randomized block design for first crop and split plot design for second crop with three replications. The eight INM practices viz., 100% RDF (60-30-30 kg/ha N-P2O5-K2O) (Y1), 100% RDF + biofertilizer consortium (Y2), 75% RDF + 25% N through vermicompost (Y3), 75% RDF + 25% N through vermicompost + biofertilizer consortium (Y4), 50% RDF + 50% N through vermicompost (Y5), 50% RDF + 50% N through vermicompost + biofertilizer consortium (Y6), 25% RDF + 75% N through vermicompost (Y7) and 25% RDF + 75% N through vermicompost + biofertilizer consortium (Y8) were applied to yellow sarson crop. In greengram crop the residual effect of the treatments applied to yellow sarson were allotted in main plots and two different integrated nutrient management practices viz., 100% RDF + biofertilizer consortium (G1) and 50% RDF + biofertilizer consortium (G2) in the sub plots. The soil of the experimental site was sandy loam in texture, acidic in reaction (pH 5.40 and 5.56), medium in organic carbon (0.69 and 0.72%), available N (274.86 and 290.75 kg/ha), available K2O (138.16 and 140.89 kg/ha) and low in available P2O5 (17.90 and 20.30 kg/ha) in the year 2017-18 and 2018-19, respectively. Experimental findings revealed that application of 75% RDF + 25% N through vermicompost + biofertilizer consortium (Y4) resulted in significantly higher growth as well as yield attributing characters like plant height, number of branches per plant, dry matter accumulation, crop growth rate, relative growth rate, number of siliquae per plant, length of siliqua, number of seeds per siliqua in both the years. The highest seed yield of 998.34, 1026.22 and 1012.28 kg/ha, stover yield of 2393.97, 2420.65 and 2407.31 kg/ha during 2017-18, 2018-19 and in pooled analysis, respectively, were recorded with treatment having 75% RDF + 25% N through vermicompost + biofertilizer consortium (Y4). The seed oil content of 36.40 and 36.97% and seed protein content of 13.27 and 13.44% were also recorded in Y4 in 1st and 2nd year, respectively. Similar effects of this treatment were also observed in respect of N, P and K content and uptake by both seed and stover. However, soil microbial population, microbial biomass carbon, phosphomonoesterase activity and fluorescein di-acetate hydrolase activity after harvest of yellow sarson were significantly higher in treatment having 25% RDF + 75% N through vermicompost + biofertilizer consortium (Y8). The crop recorded the highest gross return (` 56105 in 2017-18 and ` 57652 in 2018-19), net return (` 35407 during 2017-18 and ` 36954 during 2018-19) and benefit-cost ratio (2.71 during 2017-18 and 2.79 during 2018-19) with the treatment containing 75% RDF + 25% N through vermicompost + biofertilizer consortium (Y4). 7 In case of greengram, residual effect of 25% RDF + 75% N through vermicompost + biofertilizer consortium (Y8) resulted in significantly higher growth as well as yield attributing characters like plant height, number of branches per plant, dry matter accumulation, crop growth rate, number of pods per plant and number of seeds per pod in both the years. The effect of these was reflected in higher seed yield (849.56, 806.56 and 828.06 kg/ha in the year 2018, 2019 and in pooled analysis, respectively) and stover yield (2012.68, 1935.58 and 1974.13 kg/ha in 2018, 2019 and in pooled analysis, respectively) under the same integrated nutrient management practices. The maximum values of N, P and K uptake by seed and stover, soil microbial population, microbial biomass carbon, phosphomonoesterase activity and fluorescein di-acetate hydrolase activity after harvest of greengram were also observed under this treatment (Y8). However,direct application of 100% RDF + biofertilizer consortium (G1) brought about higher values in growth parameters, yield attributes, yield of seed (804.21, 724.68 and 764.45 kg/ha during 2018, 2019 and in pooled analysis, respectively) and stover yield (1830.89, 1763.80 and 1797.35 kg/ha during 2018, 2019 and in pooled analysis, respectively), protein content in seed (22.39 and 22.26% in 2018 and 2019 respectively), content and uptake of N, P and K by both seed and stover, soil microbial population, microbial biomass carbon, phosphomonoesterase activity and fluorescein diacetate hydrolase activity after harvest of greengram over 50% RDF + biofertilizer consortium (G2). The highest gross return (` 50726 in 2018 and ` 48922 in 2019), net return (` 33611 during 2018 and ` 31807 during 2019) and benefit-cost ratio (2.96 during 2018 and 2.86 during 2019) were observed under treatment Y8G1 containing 100% RDF + biofertilizer consortium (G1) + residue of treatment Y8 (25% RDF + 75% N through vermicompost + biofertilizer consortium). In regards to yellow sarson-greengram cropping system the highest yellow sarson equivalent yield (1678.57 and 1614.02 kg/ha in 2018 and 2019, respectively) were obtained by treatment Y4G1 containing 100% RDF + biofertilizer consortium (G1) + residue of treatment Y4 (75% RDF + 25% N through vermicompost + biofertilizer consortium). The highest gross return (` 93518 in 2017-18 and ` 89981 in 2018-19), net return (` 55705 during 2017-18 and ` 52168 during 2018-19) and benefit-cost ratio (2.47 during 2017-18 and 2.37 during 2018-19) of yellow sarsongreengram cropping system were observed under treatment Y4G1, containing 100% RDF + biofertilizer consortium (G1) + residue of treatment Y4 (75% RDF + 25% N through vermicompost + biofertilizer consortium). The performance of yellow sarsongreengram cropping system was assessed on the basis of yellow sarson equivalent yield, net monetary returns and B-C ratio. The application of 75% RDF + 25% N through vermicompost + biofertilizer consortium to yellow sarson and 100% RDF + biofertilizer consortium to greengram was the most beneficial combination compared to rest of the treatments.
  • ThesisItemOpen Access
    IMPROVED FARMING SYSTEM TECHNOLOGY INCLUSION INTO EXISTING FARMING SYSTEM FOR SUSTAINABLE AGRICULTURE
    (AAU, Jorhat, 2016-01) SUTRADHAR, PRANJIT; Baishya, Ajit
    A study was conducted during 2012–13 to 2014–15 in Silikha Sanatan village of Titabor Sub-division of Jorhat District of Assam to find out the productivity and profitability of the inclusion of improved farming systems in their existing farming systems especially effective for small and marginal farmers. Benchmark survey was carried out in the village and accordingly different types of existing farming systems were identified and their constraints were analyzed. Mono-cropping of rice was predominant practice in that area and small earthen aperture were treated as water reservoir which failed to meet the demand during Rabi period. In total, there were 54 (fifty four) numbers of farmers selected out of which most of them belong to the tribal community. According to their farm holding size and income, they were categorized into two groups- Resource constraint and Resource available. There were in total 12 (Twelve) existing farming systems identified and accordingly scientific interventions were made in their existing farming systems such as nutrient management on the basis of soil test value, multiple cropping and balanced feeding to live-stocks etc. In the year 2015, impacts were analyzed. Out of 12 farming systems among both the group of farmers, Module-V (Crop + Fishery + Duckery) was found to be very profitable with B:C ratio 2.80 followed by Module-II (Crop + Cattle + Poultry) with B:C ratio 2.64 which were practiced by resource constraint farmers. Besides, the final soil properties such as pH, organic carbon and nutrient status were improved over initial more particularly in case of the farmers growing greengram and blackgram in their cropping sequence. It can be concluded that, existing farming systems can be improved through scientific interventions and Module-V and Module-II can be suggested for resource available and resource constraint farmers which were found to be economically profitable and socially acceptable farming systems for the marginal farmers of the Silikha Sanatan Village of Titabar sub-division of Jorhat District.
  • ThesisItemOpen Access
    Minimum Tillage And Crop Establishment Techniques For Wheat Succeeding Sali Rice
    (Assam Agricultural University; Jorhat, 2001) Sarma, Digambar; Deka, J.
  • ThesisItemOpen Access
    Direct And Residual Effect Of Phosphorus In Winter Rice - Groundnut Sequence Under Irrigated Conditions
    (Assam Agricultural University; Jorhat, 2004) Dutta, Rinjumoni; Gogoi, P. K.
  • ThesisItemOpen Access
    Management Of Phosphorus In Winter Rice (Oryza Sativa) Groundnut (Arachis Hypogaea L.) Sequence Under Medium Land Situation In Assam
    (Assam Agricultural University; Jorhat, 2002) Kalita, Bangshidhar; Gogoi, P. K.
  • ThesisItemOpen Access
    Recycling Effect Of Crop Residues In Combination With Inorganic Fertilizers In Rice - Wheat System
    (Assam Agricultural University; Jorhat, 2000) Das, Kameswar; Medhi, D. N.
  • ThesisItemOpen Access
    Effect Of Different Tillage Practices On Rice-Rapeseed Cropping System
    (Assam Agricultural University; Jorhat, 2006) Dutta, Prokash; Sarmah, N. N.
  • ThesisItemOpen Access
    Integrated Weed Management In Rice (Direct Seeded Summer) - Rice (Transplanted Kharif) Sequence
    (Assam Agricultural University; Jorhat, 2003) Kakati, Pradip Kr.; Deka, J.
  • ThesisItemOpen Access
    Management Strategy For Rainfed Rice-Based Cropping System In Medium Land Situation
    (Assam Agricultural University; Jorhat, 2000) Kalita, Hemen; Bora, P.C.