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University of Agricultural Sciences, Bengaluru

University of Agricultural Sciences Bangalore, a premier institution of agricultural education and research in the country, began as a small agricultural research farm in 1899 on 30 acres of land donated by Her Excellency Maharani Kempa Nanjammanni Vani Vilasa Sannidhiyavaru, the Regent of Mysore and appointed Dr. Lehmann, German Scientist to initiate research on soil crop response with a Laboratory in the Directorate of Agriculture. Later under the initiative of the Dewan of Mysore Sir M. Vishweshwaraiah, the Mysore Agriculture Residential School was established in 1913 at Hebbal which offered Licentiate in Agriculture and later offered a diploma programme in agriculture during 1920. The School was upgraded to Agriculture Collegein 1946 which offered four year degree programs in Agriculture. The Government of Mysore headed by Sri. S. Nijalingappa, the then Chief Minister, established the University of Agricultural Sciences on the pattern of Land Grant College system of USA and the University of Agricultural Sciences Act No. 22 was passed in Legislative Assembly in 1963. Dr. Zakir Hussain, the Vice President of India inaugurated the University on 21st August 1964.

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Subject: Crop Physiology × Author: ARUN, N. × End date: 2017 × Start date: 2012 × Type: Thesis ×
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    ThesisItemOpen Access
    IDENTIFICATION OF PIGEON PEA GENOTYPES FOR HIGH PHOSPHORUS UPTAKE THROUGH ACID PHOSPHATASE ACTIVITY: A BIOCHEMICAL APPROACH
    (University of Agricultural Sciences, Bangalore, 2012-03-10) ARUN, N.; AFTAB HUSSAIN, I. S.
    A vailability o f P hosphorus (P) is one o f the m ajor constraints limiting the productivity o f crop plants, due to its fixation and binding with other elements in the soil. The bound P can be utilized by growing crop genotypes through increased organic acids exudation or by increasing the activity o f acid phosphatase, both of which are known to solubilize the bound P. Keeping this in view, thirty six pigeonpea genotypes were grown with norm ally available P, organically and inorganic bound P and without P under greenhouse conditions. Based on the leaf P content and enzyme activity, six contrasting genotypes were selected to investigate the physiological or biochem ical b asis o f P uptake and utilization. It w as observed that leaf P, shoot and root P, root volum e, plan t height, root and shoot biom ass, R-S ratio and enzym e activity increased when P w as provided in organic form and it w as noticed that the P uptake efficiency increased under +P conditions whereas, the utilization efficiency increased under - P conditions. Selected genotypes like IC P3226, ICP8477 and IC P 12764 produced more roo t dry weight, root length and root volume, under P deficiency. T here was an increase in root to shoot ratio and enzym e activity under P deficient condition. There w as a considerable increase in root acid phosphatase activity in high P uptake types under organic P source and P under deficient conditions also . There was a strong correlation between root acid phosphatase activity and leaf P content in these contrasting types.