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Soil Nutrients

Soil Nutrients. By:. Objectives. Know the definition of deficiency, nutrient, toxicity, macronutrient, micronutrient. Identify the plant deficiencies from pictures Evaluate a plant to identify the nutrient absorption rate. . Terms and Definitions.

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Soil Nutrients

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  1. Soil Nutrients By:

  2. Objectives • Know the definition of deficiency, nutrient, toxicity, macronutrient, micronutrient. • Identify the plant deficiencies from pictures • Evaluate a plant to identify the nutrient absorption rate.

  3. Terms and Definitions • Nutrient – Element necessary for plant growth and reproduction. • Deficiency – Plant condition where an essential nutrient is not sufficiently available. • Micronutrient – Nutrient needed in smaller quantities

  4. Macronutrient – Nutrient needed in larger quantities Toxicity – A point that is reached where too much of a nutrient becomes poisonous Terms and Definitions

  5. Primary and Secondary Nurtrients • Nitrogen • Phosphorus • Potassium • Calcium • Magnesium • Sulfur

  6. Nitrogen Functions • Gives plants the green coloring • Makes up 1% to 4% of plant’s harvested material • Induces vigorous, rapid growth in plants • 98% of the planet’s nitrogen is in the primary rock of the Earth, the remaining 2% is in the atmosphere • Most readily absorbed

  7. Nitrogen Deficiency Symptoms • Chlorosis – Yellowing in color of leaves • Plant growth is stunted

  8. Phosphorus • Stimulates root growth • Important for plant cells genetic material and energy transfer with ATP 3rd most readily absorbed

  9. Phosphorus Deficiency Symptoms • Stunted Growth • Purplish coloring of leaves

  10. Potassium • Production and translocation of carbohydrates • Water intake and respiration • Stiffens stalks and straws • 2nd most readily absorbed

  11. Potassium Deficiency Symptoms • Shorter and weaker plants • Bronzing or a browning of leaf color

  12. Magnesium • Vital for photosynthesis • Chlorophyll or the green coloring of the plant • Needed for protein synthesis

  13. Magnesium Deficiency Symptoms • Leaves curl along the margins • Leaf parts show a whitish color

  14. Calcium • Gives plant strength • Stimulates formation of nitrates • Promotes root and leaf growth

  15. Calcium Deficiency Symptoms • Chlorosis beginning in the leaf edges and moving inward • Terminal buds become distorted

  16. Sulfur • Stimulates seed production • Necessary for nodule formation on legumes • Affects protein and crop quality

  17. Sulfur Deficiency Symptoms • Similar symptoms to that of a nitrogen deficiency • Stunted appearance

  18. Micronutrients in Plants • Iron • Maganese • Boron • Molybdenum • Copper • Zinc • Chlorine

  19. References Laca, Andrew. “Ag Lesson Plans in Power Point”. Soil Furtility. 19 May 2001. Glen Rose FFA, Glen Rose., USA. 27 Feb 2005 <http://www.glenroseffa.org/lesson%20plans.htm> Primal Seeds. 26 Oct 2002. 27 Feb 2005 <http://www.primalseeds.org/nutrients> Nutrient Deficiency Symptoms on Agronomic Crops. 12 June 2002. 27 Feb 2005 <http://www.nrs.mcgill.ca/whalen/nutrient/symptom.html>

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