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AG 501 PRINCIPLES OF CROP PRODUCTION                                                                                 (3L+1P) II

Objective
  To teach the basic concepts of soil and crop management along with quantitative agro-biological principles and crop growth analysis

Theory

UNIT I
  Historical aspects of crop production, genesis of scientific principles and modern concepts of crop production.

UNIT II
  Quantitative agro-biological principles and their validity; Mitscherlich yield equation, its interpretation and validity; concept of inverse yield nitrogen law and Boule unit.

UNIT III
  Conceptual development in tillage practices, resources conservation technologies, conservation agriculture, integrated farming systems, organic farming and precision agriculture.

UNIT IV
  Theoretical concepts involved in growth analysis in relation to environment; validity and limitations in interpreting crop growth; different types of growth curves; root:shoot relationship; concept of plant ideotypes; physiological principles of dryland crop production; stress and strains - nature, injury, resistance and management.

UNIT V
  Concepts of soil-plant relationships, yield potential of crops and cropping systems and their relationship to fertility status of soil; maximization of crop yields and the apparent limitations.

UNIT VI
  Crop plants in relation to environment, competition between component crop plants in mixed crop and between crops and weeds; solar radiation, available moisture regime and crop production.

UNIT VII
  Economics of crop production, law of diminishing returns in crop production, and crop response production functions.

Practicals
  Plant sampling at different crop growth stages for dry matter and leaf area measurement. Calculation of growth indices using dry matter and leaf area, and interpretation of results in relation to treatments. Construction of crop growth curve based on growth analysis data. Measurement of root:shoot relationship in crops at different growth stages. Computation of harvest index of different crops based on biomass and energy equivalent. Working out sustainability index of different cropping systems. Calculation of indices for assessment of cropping systems and input-use efficiency. Studying the effect of planting geometry on competition between crop plants, crop plants and weeds and input-use efficiency. Assessment of crop yield on the basis of yield attributing characters. Statistical analysis of fertilizer experiments to work out response equation, and optimum/economic dose of nutrients.

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