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2019 - 201912020 - 20221
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Subject: Agronomy × Author: Bhalla, Tamanna × Start date: 2007 ×
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    ThesisItemOpen Access
    Ecology and control of Alternanthera philoxeroides (Mart.) Griseb and Synedrella vialis (Less.) A. Gray
    (CSK HPKV, Palampur, 2022-11-26) Bhalla, Tamanna; Kumar, Suresh
    A field experiment was conducted at the Research Farm, Department of Agronomy, CSK HPKV, Palampur during Kharif 2020 and 2021 to study the ecology and control of Alternanthera philoxeroides (Mart.) Griseb and Synedrella vialis (Less.) A. Gray. Eleven weed control treatments viz. glyphosate 1000 g/ha, paraquat 1000 g/ha, 2,4-D Na salt 1250 g/ha, 2,4-D ethyl ester 1000 g/ha, metsulfuron methyl 4 g/ha, carfentrazone 25 g/ha, glufosinate ammonium 500 g/ha, bispyribac Na 20 g/ha, flumioxazin 200 g/ha, diuron 500 g/ha and weedy check (control) were tested in Randomized Block Design with three replications. To study the ecology of both the weeds, experiments were conducted at three locations i.e. Research Farm of Department of Agronomy (Palampur), KVK (Berthin, Bilaspur) and on farmer’s field (Kangra). Alternanthera philoxeroides recorded the highest shoot length (97.25 and 100.75 cm) and number of leaves per shoot (40 and 42) in the month of October and this weed did not flower throughout the duration of study at both the locations i.e. Palampur and Kangra. Whereas, Synedrella vialis exhibited a low growing, mat forming habit with maximum shoot height (13 to 15.50 cm) and number of leaves per shoot (12) in August and September. This weed propagated vegetatively (runner) as well as through seeds since flowering occurred throughout the growth period at all the three locations. Results of the weed control study revealed that the application of glyphosate 1000 g/ha and metsulfuron methyl 4 g/ha behaving statistically alike were significantly effective in reducing the count (No./m2 ) and dry weight (g/m2 ) of Alternanthera philoxeroides and Synedrella vialis during both the years of study. The bioassay study indicated that all the herbicides used for the control of these weeds did not retain any residue in the soil and thus, can be considered safe for use.
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    ThesisItemOpen Access
    EFFECT OF ORGANIC AND INORGANIC SOURCES OF NUTRIENTS ON PERFORMANCE OF SORGHUM AND PEARL MILLET MIXTURE .
    (CSKHPKV, Palampur, 2019-07-15) Bhalla, Tamanna; Kumar, Naveen
    A field experiment “Effect of organic and inorganic sources of nutrients on performance of sorghum and pearl millet mixture” was conducted at research farm of Fodder Section, CSK HPKV, Palampur during kharif 2018. Soil of the experimental field was acidic in reaction, low in organic carbon, low in available nitrogen, medium in available phosphorus and medium in available potassium. The experiment was laid out in randomized block design with three replications, consisting of nine treatments having eight combinations of two nitrogen levels (no nitrogen and 50 per cent recommended nitrogen), two FYM levels (10 and 15 t/ha) and two levels of Jeevamrit concentration (5 and 10 %), plus one treatment of recommended dose of NPK (120, 60, 40 kg/ha) through inorganic sources. The soil organic carbon and microbial biomass carbon were highest with 50 per cent recommended N + 15 t/ha FYM + 10 per cent Jeevamrit. Treatment with integrated use of 50 per cent recommended N + FYM and Jeevamrit increased available soil nitrogen, phosphorus and potassium over initial values and was highest with recommended NPK. Integrated nutrient management and recommended NPK behaving alike resulted in better growth (emergence count, plant height, shoot number, leaf stem ratio and dry matter accumulation), fodder yield (green and dry), crude protein yield, acid detergent fibre and neutral detergent fibre yields. The uptake of N and K was significantly higher with 50 per cent recommended N + 10 t/ha FYM + 10 per cent Jeevamrit and higher uptake of P was with recommended NPK. Application of recommended NPK proved most profitable with highest net return (` 87544) and net return per rupee invested (2.35)..