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University of Agricultural Sciences, Dharwad (2004)

EFFECT OF IN SITU MOISTURE CONSERVATION PRACTICES AND NITROGEN LEVELS ON GROWTH AND YIELD OF RABI SORGHUM IN VERTISOLS UNDER RAINFED CONDITION

Kiran, J A

Titre : EFFECT OF IN SITU MOISTURE CONSERVATION PRACTICES AND NITROGEN LEVELS ON GROWTH AND YIELD OF RABI SORGHUM IN VERTISOLS UNDER RAINFED CONDITION

Auteur : Kiran, J A

Université de soutenance : University of Agricultural Sciences, Dharwad

Grade : Master of Science in Agronomy (2004)

Résumé
A field experiment was conducted to study the effect of in situ moisture conservation practices and nitrogen levels on growth and yield of rabi sorghum under rainfed vertisols during rabi 2002 at Main Agricultural Research Station, University of Agricultural Sciences, Dharwad. The experiment was laid out in split plot design with different in situ moisture conservation practices as main plots and nitrogen levels as sub-plots with three replications. Among the different in situ moisture conservation practices, formation of ridges and furrows (15.78 q/ha) and compartment bunding (14.96 q/ha) recorded 34.4 and 27.4 per cent higher grain yield, respectively over flat bed (11.74 q/ha) method of sowing. Whereas broad bed and furrows (13.56 q/ha) was on par with compartment bunding. Plots laid out with in situ moisture conservation practices better conserved soil moisture in top 60 cm soil profile resulting in better yield. Improved growth and yield components and higher nutrient uptake was observed with in situ moisture conservation practices over flat bed. Irrespective of in situ moisture conservation practices, nitrogen levels had significant effect on growth and yield of rabi sorghum. Application of 75 kg N per ha produced higher grain yield (15.12 q/ha) over application of 25 kg N per ha (12.53 q/ha), but was on par with 50 kg N per ha (14.38 q/ha). The per cent increase in yield was 21 and 15 per cent with application of 75 and 50 kg N per ha, respectively over 25 kg N per ha. Ridges and furrows and compartment bunding with 50 kg N per ha recorded 49.47 and 37.99 per cent higher net returns, respectively compared to flat bed method of sowing (farmer’s practice). Interaction effects were not significant."

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