Course Content
Agrometeorology
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Some common terminologies
Soil physics, genesis and classification
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Key points to remember
Horizons
Soil conservation
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Some key points to remember
Irrigation
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Some key points to remember
Farm structure and Surveying
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Some key points to remember
Types of chains
Farm Power and Machinery
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Terminologies
Soil Science
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Terminologies
Soil and its porosity
Soil and the reason behind its color difference
Key points to remember about soil
Nutrients and deficiency symptoms
Function of essential mineral nutrients
Phosphatic fertilizer
Classification of soil
Agrometeorology Essentials: Rahul’s Quick Guide for Master’s Prep

Terminologies

  1. Additives: Material added to fertilizer to improve its physical condition.
  2. Amendments: Material added to influence plant growth
  3. Amminization: Protein à amino group
  4. Anion exchange capacity is expressed as centimoles per kg ( Cmol/kg).
  5. Ap: Surface layer of soil disturbed by cultivation or pasturing.
  6. Basic slug: A by-product of steel industry obtained from phosphate iron ores.
  7. Ammonification: Protein à ammonia à ammonium by Bacillus mycoides, B. ramosus, B. vulgaris
  8. Bulky organic manure; Supply plant nutrients in small quantity and organic matter in large quantity.
  9. Positive charge: Cation and negative charge: Anion
  10. Soil tends to be acidic in humid region.
  11. Soil tends to be alkaline when evapotranspiration > precipitation.
  12. Chelates: Organic compound capable of holding plant nutrients thus preventing available form of nutrient to plant.
  13. Colloid: Particle size < 2µ ( 0.002 mm) in diameter.
  14. Colloidal clay: Particle size < 1µ in diameter
  15. Flocculation: Individual tiny soil particles clump together into small clumps or floccules.
  16. Ligand: Chelating substance or donor group of compounds that donate lone pair of electrons.
  17. Muck soil: Containing 20-50 % OM.
  18. Peat soil: Containing 50% OM.
  19. Pedon: Representative of soil ( small volume).
  20. Protonation: Attachment of H+ to OH– ions.
  21. Straight fertilizer: Fertilizer that have only one plant nutrient.
  22. Immobilization: Conversion of simple inorganic compound to complex one
  23. Eluviation: Removal of soil from suspension also called leaching.
  24. Localized placement: Placing fertilizer into the soil close to seed or plant.
  25. Mineralization : C:N ratio is 20:1.
  26. Optimum dose: Refers to amount of fertilizer that produces the greatest profit per unit area.
  27. Maximum thermometer: To measure higher temperature; mercury thermometer.
  28. Minimum thermometer: To measure lower temperature; Alcohol thermometer
  29. Thermograph: Mechanical device to record air temperature; continuously.
  30. Winward: Refers to the direction from which wind comes
  31. Leeward: Direction towards which wind blows.
  32. Psychrometer/ hygrometer: Instrument for measuring RH

a) Assman’s psychrometer: RH in crop canopy

b) Hair hygrometer: RH inside room

c) Hygrograph: Record humidity continuosly

33. Critical Nutrient Level: Level below which yield is reduced.

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