2. Fertilizers
Fertilizers: substances that supply plant nutrients or change soil fertility. They are the most effective means of increasing crop production and of improving the quality of food.
Organic fertilizers: are mined
Synthetic fertilizers are man made.

3. Fertilizers Fertilizers typically provide, in varying proportions:
the three primary macronutrients: nitrogen (N), phosphorus (P), and potassium (K).
the three secondary macronutrients: calcium (Ca), sulfur (S), magnesium (Mg).
and the micronutrients or trace minerals: boron (B), chlorine (Cl), manganese (Mn), iron (Fe), zinc (Zn), copper (Cu), molybdenum (Mo) and selenium (Se)

4. Fertilizers
Nitrogen: composition of protein and chlorophyll. Helps with leaf and stem formation.
Phosphorous: root and flower growth, cellular respiration and photosynthesis.
Potassium: early growth, disease resistance, starch, protein and chlorophyll production.

5. Fertilizers How does Organic Farming Compare to using Fertilizers?
Fertilizers and Frogs
What are the Pros and Cons of Fertilizer Use?
How does Organic Farming Compare to using Fertilizers?
Read through “Organic Farming” p194 pros and cons…