3. Plant Nutrition Vs Plant Fertilization Nutrition: Availability and type of chemical elements in plant Fertilization: Adding nutrients to soil

4. Nutrients 16 elements:  C, H, O,  Macronutrients  Micronutrients

5. Macronutrients  Nutrients required in large quantities  N (Nitrogen)  P (Phosphorus)  K (Potassium)  Ca (Calcium)  Mg (Magnesium)  S (Sulfur)

6. Primary Nutrients  N  P  K  Primary because they are needed in large amounts

7. Secondary Macronutrients  Ca  Mg  S Only moderate amounts required

8. Micronutrients (Nutrients needed in small quantities)  B (Boron)  Cu (Copper)  Cl (Chlorine)  Fe (Iron)  Mn (Manganese)  Mo (Molybdenum)  Na (Sodium)  Zn (Zinc)

9. What are the role of nutrients? Refer to Handout

10. What makes plant look Unhealthy?  Discoloration of leaves  Death of leaf tissue  Stunted growth

11. Examples Discoloration of Leaves

12. Chlorosis  Chlorosis is a yellowing of leaf tissue due to a lack of chlorophyll. Possible causes of chlorosis include poor drainage, damaged roots, compacted roots, high alkalinity, and nutrient deficiencies in the plant. Nutrient deficiencies may occur because there is an insufficient amount in the soil or because the nutrients are unavailable due to a high pH (alkaline soil). Or the nutrients may not be absorbed due to injured roots or poor root growth.

13. Nutrient Deficiencies  N  Chlorosis on lower leaves

14. Nutrient Deficiencies NN  Chlorosis of leaves

15. PP  Purplish coloration of leaves

16.  K  Chlorosis of leaves  Brown leaf edges

17.  K  Chlorosis of leaves  Brown leaf edges

18. Nutrient Deficiencies S: yellowing of entire plant; leaves

19. How can you correct nutrient deficiency?

20. Fertilizer

21. What is fertilizer? Any material added to the soil to provide nutrients that will increase growth, yield, or nutritional value of the plants.

22. Fert Classifications  Inorganic  Natural Organic  Synthetic Organic

23. Inorganic Fert  Non-living sources (minerals/rocks)  Chemically made

24. Inorganic Fert Characteristics:  Nutrients in soluble form and quickly made available to plants  Should not come in contact with roots or foliage for long time period

25. Natural Organic  From plant/animal material Characteristics:  N usually predominant  Nutrients are only made available to the plants as the materials decay in soil, so SLOW ACTING & LONG LASTING

26. Natural Organic Examples:  Animal manure  Cottonseed meal  Soybean meal  Dried blood  Dried ground/sewage sludge  Bone meal

27. Synthetic Organic Fert  Made from carbon based materials