1. Mineral Nutrition Studied by soil-free culture in nutrient solutions:

2. Mineral Nutrition Studied by soil-free culture in nutrient solutions: Hoagland’s is best known

3. Mineral Nutrition Soil-free culture Sand culture: don’t really control nutrients

4. Mineral Nutrition Soil-free culture Sand culture: don’t really control nutrients Hydroponics: immerse roots in nutrient solution

5. Mineral Nutrition Soil-free culture Sand culture: don’t really control nutrients Hydroponics: immerse roots in nutrient solution Rapidly deplete nutrients & O 2 & alter pH

6. Mineral Nutrition Soil-free culture Sand culture: don’t really control nutrients Hydroponics: immerse roots in nutrient solution Rapidly deplete nutrients & O 2 & alter pH Slanted film maintains [nutrients] & O 2

7. Mineral Nutrition Soil-free culture Sand culture Hydroponics: immerse roots in nutrient solution Slanted film maintains [nutrients] & O 2 Aeroponics sprays nutrient solution on roots

8. Mineral Nutrition Macronutrients CHOPKNS

9. Mineral Nutrition Macronutrients CHOPKNS CHOPNS make biopolymers

10. Mineral Nutrition Macronutrients CHOPNS make biopolymers N deficiency mobile in plant, so shows first in old leaves

11. Mineral Nutrition Macronutrients CHOPNS make biopolymers P deficiency mobile in plant, so shows first in old leaves

12. Mineral Nutrition Macronutrients CHOPNS make biopolymers S deficiency mobile in plant, so shows first in old leaves

13. Mineral Nutrition Macronutrients CHOPKNS CHOPNS make biopolymers K makes turgor, enzyme cofactor mobile in plant, so shows first in old leaves

14. Mineral Nutrition Macronutrients CHOPKNS Ca: signaling, middle lamella, cofactor immobile in plant, so shows first in young leaves

15. Mineral Nutrition Macronutrients Ca: signaling, middle lamella, cofactor Fe: cofactor immobile in plant, so shows first in young leaves

16. Mineral Nutrition Macronutrients Ca: signaling, middle lamella, cofactor Fe: cofactor Mg: cofactor mobile in plant, so shows first in old leaves

17. Mineral Nutrition Macronutrients: CHOPKNSCaFeMg Ca: signaling, middle lamella, cofactor Fe: cofactor Mg: cofactor mobile in plant, so shows first in old leaves

18. Mineral Nutrition Macronutrients: CHOPKNSCaFeMgBNaCl Ca: signaling, middle lamella, cofactor Fe: cofactor Mg: cofactor mobile in plant, so shows first in old leaves

19. Mineral Nutrition Micronutrients: BNaCl B: cell elongation. NA metabolism immobile in plant, so shows first in young leaves

20. Mineral Nutrition Micronutrients: BNaCl B: cell elongation. NA metabolism Na: PEP regeneration in C4, K substitute mobile in plant, so shows first in old leaves

21. Mineral Nutrition Micronutrients: BNaCl B: cell elongation. NA metabolism Na: PEP regenerationin C4, K substitute Cl: water-splitting, osmotic balance mobile in plant, so shows first in old leaves

22. Mineral Nutrition Micronutrients: BNaCl others include Cu, Zn, Mn B: cell elongation. NA metabolism Na: PEP regeneration, K substitute Cl: water-splitting, osmotic balance Cu: cofactor immobile in plant, so shows first in young leaves

23. Mineral Nutrition Commercial fertilizers mainly supply NPK

24. Plant food 2.6% ammoniacal nitrogen 4.4% nitrate nitrogen 9% phosphorus 5% potassium calcium (2%) magnesium (0.5%) sulfur (0.05%) boron (0.02%) chlorine (0.1%) cobalt (0.0015%) copper (0.05%) iron (0.1%) manganese (0.05%) molybdenum (0.0009%) nickel (0.0001%) sodium (0.10%) zinc (0.05%)

25. Mineral Nutrition Soil nutrients Amounts & availability vary PSU extension Text

26. Mineral Nutrition Soil nutrients Amounts & availability vary Many are immobile, eg P, Fe

27. Mineral Nutrition Soil nutrients Amounts & availability vary Many are immobile, eg P, Fe Mobile nutrients come with soil H 2 O