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SOIL FERTILITY

SOIL FERTILITY. INTRO TO SOILS CH 10. SOIL FERTILITY. Ability of soil to supply nutrients for plant growth Readily Available – soil solution Not Readily Available – mineral particles Important Concepts: - quantity of nutrients - protection from leaching - availability

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SOIL FERTILITY

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  1. SOIL FERTILITY INTRO TO SOILS CH 10

  2. SOIL FERTILITY Ability of soil to supply nutrients for plant growth Readily Available – soil solution Not Readily Available – mineral particles Important Concepts: - quantity of nutrients - protection from leaching - availability - ease of root access

  3. SOIL FERTILITY Essential Elements* needed for plant growth * 18 elements identified as essential for plants - essential elements used in large amounts are called macronutrients - essential elements used in smaller amounts are called micronutrients

  4. SOIL FERTILITY Three (3) nutrients are obtained from air and water: C, O, H The other nutrients are obtained from the soil as ions (see fig. 9-1) except Boron (H3BO3) as Boric Acid

  5. NUTRIENT IONS Ions are simply charged atoms or molecules . . . Cations are positive (+) Anions are negative (-) Charges result from difference in number of protons and electrons

  6. Plant roots absorb nutrient ions . . . Soil particles adsorb nutrient ions

  7. Sources of Elements in Soil Four Sources: (fig. 10-4, p.159) Soil Minerals Organic Matter Adsorbed Nutrients Dissolved Ions

  8. http://syllabus.syr.edu/esf/rdbriggs/for345/cation.htm

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