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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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20202
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Subject: Soil Science and Agriculture Chemistry × Author: SUDARSHAN, VARMA × Start date: 2006 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    IMPACT OF RICE HUSK BIOCHAR ON ADSORPTION, BIOAVAILABILITY AND BALANCE OF NITROGEN IN DIFFERENT SOILS FOR MAIZE (Zea mays L.)
    (University of Agricultural Sciences, Bangalore, 2020-11-21) SUDARSHAN, VARMA; Prakash N B
    A study was conducted to know adsorption of different forms of nitrogen by using graded levels (0, 4, 8 t ha-1) of rice husk biochar (RHB) in different soils (acidic, neutral and alkaline) with urea, KNO3 and NH4Cl as N sources. A pot culture greenhouse study was also conducted to know the effect of graded levels (0, 2, 4, 8 t ha-1) of RHB and different sources of nitrogen on balance and bioavailability of nitrogen for maize. The study revealed that, irrespective of soils, application of RHB @ 8 t ha-1 along with urea as N source recorded higher adsorption of NH4 +-N compared to NO3--N. The pot culture experiment revealed that, application of increased levels of RHB, decreased the NH4 +-N and increased the NO3--N content in all three studied soils. Higher plant height, shoot dry biomass and N uptake by maize was recorded in neutral soil with application of RHB @ 4 t ha-1 along with KNO3 as N source. Application of graded levels of RHB along with different sources of N increased the N balance and decreased the net nitrogen gain in all the soils. In general, combined application of RHB at varied rates along with different sources of N decreased the nitrogen accumulation efficiency (NAE) and increased the nitrogen use efficiency (NUE) and enhanced the bioavailability of N for maize in all the soils.
  • Thumbnail Image
    ThesisItemOpen Access
    IMPACT OF RICE HUSK BIOCHAR ON ADSORPTION, BIOAVAILABILITY AND BALANCE OF NITROGEN IN DIFFERENT SOILS FOR MAIZE (Zea mays L.)
    (University of Agricultural Sciences, Bangalore, 2020-11-21) SUDARSHAN, VARMA; SUDARSHAN, VARMA; Prakash N B; Prakash N B
    A study was conducted to know adsorption of different forms of nitrogen by using graded levels (0, 4, 8 t ha-1) of rice husk biochar (RHB) in different soils (acidic,neutral and alkaline) with urea, KNO3 and NH4Cl as N sources. A pot culture greenhouse study was also conducted to know the effect of graded levels (0, 2, 4, 8 tha-1) of RHB and different sources of nitrogen on balance and bioavailability of nitrogen for maize. The study revealed that, irrespective of soils, application of RHB @ 8 t ha-1 along with urea as N source recorded higher adsorption of NH4 +-N compared to NO3--N. The pot culture experiment revealed that, application of increased levels of RHB, decreased the NH4 +-N and increased the NO3 --N content in all three studied soils. Higher plant height, shoot dry biomass and N uptake by maize was recorded in neutral soil with application of RHB @ 4 t ha-1 along with KNO3 as N source. Application of graded levels of RHB along with different sources of N increased the N balance and decreased the net nitrogen gain in all the soils. In general, combined application of RHB at varied rates along with different sources of N decreased the nitrogen accumulation efficiency (NAE) and increased the nitrogen use efficiency (NUE) and enhanced the bioavailability of N for maize in all the soils.