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Roots, Shoots & Grain Yield in Rice, Maize & Sorghum

Roots, Shoots & Grain Yield in Rice, Maize & Sorghum. H E Shashidhar, Associates and Students Department of Plant Biotechnology College of Agriculture, GKVK, Bangalore 560065. Idea and Methodology.

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Roots, Shoots & Grain Yield in Rice, Maize & Sorghum

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  1. Roots, Shoots & Grain Yield in Rice, Maize & Sorghum H E Shashidhar, Associates and Students Department of Plant Biotechnology College of Agriculture, GKVK, Bangalore 560065

  2. Idea and Methodology • Plants with deep and extensive root systems ‘empower’ the plant to access relatively more water from deeper soil layers, • Plants with deeper root system have a better chance of survival in a depleting moisture regime, • Traditional accessions of rice manifest deep rooting nature due to continued (natural) selection in adverse growth conditions, • Genotypes with deep rooting nature may not necessarily be high yielding in germplasm accessions, • Improved varieties have relatively shallow roots as they were subjected to selection

  3. System of Root study • Hydroponic • Root system grown in water or nutrient solution • Aeroponic • Root system grown in air with periodic (fine) spray of nutrients . • Soil column • Roots measured in soil filled tubes, raised structures etc

  4. System of Root study • Pin Box method • Roots screened in slanting bozes where one side has pins attached to it to anchor roots • Rhizotron • An artificial chamber where factors can be controlled

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