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Acharya N G Ranga Agricultural University, Guntur (2017)

IN-SITU MOISTURE CONSERVATION PRACTICES FOR RAINFED GROUNDNUT

RAJITHA, GOVINDANNAGARI

Titre : IN-SITU MOISTURE CONSERVATION PRACTICES FOR RAINFED GROUNDNUT

Auteur : RAJITHA, GOVINDANNAGARI

Université de soutenance : Acharya N G Ranga Agricultural University, Guntur

Grade : Master of Science in Agriculture 2017

Résumé partiel
A field experiment entitled “In-situ moisture conservation practices for rainfed groundnut” was carried out during kharif, 2016 on sandy loam soils of dryland farm of S.V. Agricultural College, Tirupati, Acharya N.G. Ranga Agricultural University. The experiment was laid out in randomized block design with three replications. There were eight treatments viz., Conventional tillage (T1), Vertical tillage with subsoiler upto a depth of 60 cm at an interval of 1.0 m followed by secondary tillage (T2), Deep ploughing with mouldboard plough upto a depth of 40 cm followed by secondary tillage (T3), Conservation furrow after every row (T4), Conservation furrow after every four rows (T5), Broad bed and furrows (90/30 cm) (T6), Straw mulch @ 5 tonnes ha-1 (T7) and Soil mulch (frequent intercultivation) (T8). The test variety of groundnut was ‘Dharani’. Various moisture conservation practices significantly influenced the growth parameters, yield attributes, yield, root growth, economic returns and as well as pre and post-harvest physico-chemical properties of the soil. The lowest pre and post-harvest soil bulk density was recorded with broad bed and furrows (T6), which was on par with vertical tillage (T2) and significantly superior to rest of the treatments. The highest bulk density was recorded with conventional tillage (T1). Vertical tillage (T2) maintained higher soil moisture content at 0 - 30 and 30 - 60 cm soil depths at all the crop growth stages followed by deep ploughing (T3). Broad bed and furrows (T6) also shown higher moisture content which was on par with straw mulch (T7) and significantly superior to conservation furrow after every row (T4), conservation furrow after every four rows (T5) and soil mulch (T8). Conventional tillage (T1) recorded the least soil moisture content as compared to rest of the treatments. Plant height, leaf area index, dry matter production and relative water content were highest with broad bed and furrows (T6) and vertical tillage (T2) which was closely followed by deep ploughing (T3). On comparision of different moisture conservation practices, it was observed that all the growth and yield attributes were maximum with broad bed and furrows (T6).

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