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Anand Agricultural University, Anand

Anand Agricultural University (AAU) was established in 2004 at Anand with the support of the Government of Gujarat, Act No.(Guj 5 of 2004) dated April 29, 2004. Caved out of the erstwhile Gujarat Agricultural University (GAU), the dream institution of Sardar Vallabhbhai Patel and Dr. K. M. Munshi, the AAU was set up to provide support to the farming community in three facets namely education, research and extension activities in Agriculture, Horticulture Engineering, product Processing and Home Science. At present there seven Colleges, seventeen Research Centers and six Extension Education Institute working in nine districts of Gujarat namely Ahmedabad, Anand, Dahod, Kheda, Panchmahal, Vadodara, Mahisagar, Botad and Chhotaudepur AAU's activities have expanded to span newer commodity sectors such as soil health card, bio-diesel, medicinal plants apart from the mandatory ones like rice, maize, tobacco, vegetable crops, fruit crops, forage crops, animal breeding, nutrition and dairy products etc. the core of AAU's operating philosophy however, continues to create the partnership between the rural people and committed academic as the basic for sustainable rural development. In pursuing its various programmes AAU's overall mission is to promote sustainable growth and economic independence in rural society. AAU aims to do this through education, research and extension education. Thus, AAU works towards the empowerment of the farmers.

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Author: Babariya, Nandlal Bhimabhai × End date: 1999 × Start date: 1990 × Type: Thesis × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    TRANSFORMATION AND TRANSPORT OF NITROGEN CARRIERS AS AFFECTED BY DEPTHS OF WATER AND GROWTH OF TOBACCO
    (AAU, Anand, 1992) Babariya, Nandlal Bhimabhai; Patel, C. L.
    The effect of infiltration of 5, 10 and 15 cm water on transformation and transport of surface applied ammonium sulphate (AS), Urea, Calcium ammonium nitrate (CAN) and nitrophosphate (NP), at one, 10 and 20 days after irrigation was stuidied in soil column. Field lysimeter experiment with loamy sand soil was undertaken to evaluate the effect of same N-carriers on yield and chemical composition of bidi tobacco (GT 5) (Nicotiana tabacum L.) and transformation and transport of N-carriers at various depths of soil during the growth period of 45, 90, 135 and 150 days after transplanting. Effect of transparent plastic mulch on evapotranspiration, yield, chemical composition and N-dynamics in lysimeter soil profile was also studied. Transformation of N-carriers into NO3 form ranged from 24.9 to 41.7 mg kg-1 during incubation period of 1 to 20 days, concomitantly NH4+ - N content decreased from 16.20 to 0.0 mg kg-1. The NH4- and NO3- N content declined with rise in depths of water application from 5 to 10 cm. The rate of nitrification was rapid in case of urea followed by AS, NP and CAN, The penetration of wetting front after 24 hours was found at 21, 42 and 63 cm depth coinciding NOl accximulation with the respective application of 5, 10 and 15 cm water. The migration of water alongwith NO3- was more deeper (6 or 7 cm) during 10 to 20 days period than that of one day. The NH4+ - N content depressed while NO3- - N content elevated with depth under water application rates after 24 hours but such trend was not maintained beyond this period. Urea showed significantly high NH4+ - and NO3- - N content in soil dxiring 45 days growth of tobacco and at subsequent stages of growth all sources were at par with respect to NO3- - N content. The highest NO3- - N content (23.53 mg kg-1 ) was confined to 0-30 cm depth of soil and reduced significantly with depth during growth of the crop. The NO3- - N accumulation in soil varied from 21.76 to 13.84 mg kg-1 during 45 to 90 days after transplanting, respectively. The CAN gave 36 per cent higher cured leaf yield than that of NP (96.00 g/plant)• The NO3- - and NH4+- N contents in leaf lamina were highest with CAN and AS, respectively. The per cent N losses through volatilization/ denitrification were highest with urea followed by NP, CAN and AS. Under lysimeter condition, the unaccounted for N was in order of Urea > AS > NP > CAN. Use of plastic mulch saved 10 cm water besides increasing nitrogen use efficiency by minimizing N-losses.