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Author: Ashok Kumar × Start date: 1987 ×
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Now showing 1 - 6 of 6
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    ThesisItemOpen Access
    Effect of rootstock thickness on wedge grafting in guava (Psidium guajava L.) under different growing conditions
    (CCSHAU, 2018) Ashok Kumar; Chahal, Devender
    The present investigation entitled “Effect of rootstock thickness on wedge grafting in guava (Psidium guajava L.) under different growing conditions” was conducted during 2017 at Centre for Quality Planting Material, RDS Seed Farm CCSHAU, Hisar, Haryana. The experiment comprised of 18 treatments i.e. three rootstock thickness (<0.8cm, 0.8-1.2cm and >1.2cm) and six growing conditions (polyhouse with polycap, polyhouse without polycap, shade net with polycap, shade net without polycap, open field condition with polycap and open field condition without polycap) with three replication. The results revealed that scion grafted on rootstock with thickness of 0.8-1.2cm took minimum days for bud sprouting and number of days for first leaf opening. Success percentage of grafts was also recorded maximum with rootstock thickness of 0.8-1.2cm. Shoot length and its diameter at 60, 90 and 120 days of grafting were registered maximum with rootstock thickness of >1.2cm and closely followed by rootstock thickness of 0.8-1.2cm. Number of leaves and leaf area per plant were also observed maximum with rootstock thickness of >1.2cm and closely followed by rootstock thickness of 0.8-1.2cm. Similarly, leaf chlorophyll content was observed maximum with rootstock thickness of >1.2cm and closely followed by rootstock thickness of 0.8-1.2cm. The maximum fresh and dry weight of shoot, fresh and dry weight of root were observed with rootstock thickness of >1.2cm. Most of the growth traits were observed significantly superior under polyhouse and shade net as comparison to open field condition. Grafts covered with polycap performed better than uncovered grafts under all the growing conditions. Days for graft sprouting and first leaf opening were recorded minimum under polyhouse with polycap. Maximum success percentage of grafts, shoot length and its diameter, number of leaves, leaf area per plant, fresh and dry weight of shoot and root were observed maximum under polyhouse with polycap, followed by shade net. Almost similar leaf chlorophyll contents (chlorophyll a, chlorophyll b and total chlorophyll) were recorded under polyhouse and open field condition with and without polycap. Overall grafts with rootstock thickness 0.8-1.2 cm and grown under polyhouse with polycap performed comparatively better.
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    ThesisItemOpen Access
    Site specific nutrient management for maximizing crop yields and sustaining soil health
    (CSA University of Agriculture and Technology;Kanpur, 2007) Ashok Kumar; Gupta, B.R.
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    ThesisItemOpen Access
    Molecular Epidemiology Of Mycoplasma Bovoculi In Bovines
    (Chaudhary Charan Singh Haryana Agricultural University;Hisar, 2002) Ashok Kumar; Garg, D. N.
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    ThesisItemOpen Access
    Screening And Inheritance Studies Under Supra-Optimal Temperature Conditions At Seedling Stage In Pearl Millet (Pennisetum Glaucum (L.) R. Br.)
    (Chaudhary Charan Singh Haryana Agricultural University; Hisar, 2007) Ashok Kumar; Narwal, M.S.
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    ThesisItemOpen Access
    Problem And Prospects Of Horticultural Growers In Diversified Agriculture
    (Chaudhary Charan Singh Haryana Agricultural University; Hisar, 2004) Ashok Kumar; Saharawat, Pradeep
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    ThesisItemOpen Access
    Effect of priming on seed quality in pigeonpea. (Cajanus cajan L. millsp.)
    (CCSHAU, 2006) Ashok Kumar; Kashyap, R.K.
    Experiment was conducted to study the effect of priming on seed quality in pigeonpea and also to study the various enzyme activities. To undertake this study two improved variety viz. Manak and Paras were studied. Each variety was grouped into two seed lots on the basis of germination i.e. L1 good seed lot L2 marginal seed lot. It was observed that marginal seed lot L2 performed better after applying pre-sowing treatments under laboratory and field condition. And among varieties, Paras performed better in field condition than Manak in all the priming treatments. Among all the treatment only GA3 (50ppm), cold hydration and cold dehydration +0.25% thiram showed positive results in both the varieties and lots. Treatment cold dehydration +0.25% thiram showed highest improvement in germination, vigour index-I, plumule length and dry weight in both the seed lots. An effort was also made to enhance the germination of marginal seed lot by applying CaCl2 and KNO3 priming treatments but the experiment showed negative results in both the treatments in pigeonpea. It was revealed that variety Manak was showed good enzyme activities than the Paras. And among seed lots lot L1 showed good enzyme activities than lot L2.