1. Function of Nutrients for Plant Growth Macro - & Micronutrients http://www.agriscienc e.msu.edu/2000/2030/ 2031/2031nutrients.htm

2. 2 Types of Nutrients  Macronutrients – needed by the plant in large amounts ( ESSENTIAL )  Micronutrients – needed in smaller amounts but still needed by the plant.

3. Nitrogen Deficiency Symptoms  N - Deficiency A. Yellow B. Little growth

4. Phosphorus Deficiency Symptoms  Phosphorus (P) Deficiency: --purple stems and leaves

5. Potassium Deficiency Symptoms  Potassium (K) Deficiency:  Weak roots  Brown margins

6. Potassium Deficiency Iowa State University, http://www.ent.iastate.edu/imagegal/plantpath/corn/deficiency/ndeficiency.html

7. Reading the Fertilizer Label 1 st Number Nitrogen (N) % 2 nd Number Phosphorus (P)% 3 rd Number Potassium (K)%

8. Fertilizer Calculations  50 Lbs of fertilizer marked 16-04-08  How many pounds of Nitrogen, Phosphorus and Potassium does the bag contain? Nitrogen.16 X 50 = 8.0 Lbs Phosphorus.04 X 50 = 2.0 Lbs Potassium.08X 50 = 4.0 Lbs

9. Fertilizer Calculations  25 lbs of fertilizer marked 34-06-12  How many pounds of Nitrogen, Phosphorus and Potassium does the bag contain?

10. Fertilizer Calculations  Nitrogen.34 X 25 = 8.5 Lbs.  Phosphorus.06 X 25 = 1.5 Lbs.  Potassium.12 X 25 = 3 Lbs.