| A | B |
|---|
| Sidedressing | Placing a band of fertilizer near the soil surface and to the sides after seedlings emerge from the soil. |
| Top dressing | Mixing fertilizer uniformly into the top one to two inches of growing media around the plant. |
| Perforating | Placing fertilizer in 12”-18” holes drilled 18” to 24” around the canopy drip line of fruit trees. Cover the holes and fertilizer slowly dissolves. |
| Broadcasting | Spreading fertilizer to cover the entire production area |
| Foliar spraying | Spraying micronutrients in a solution directly on plant leaves. |
| Fertigation | Incorporating water-soluble fertilizer into the irrigation system of greenhouse and nursery crops. |
| Primary nutrients | nitrogen, phosphorus, potassium |
| Secondary nutrients | calcium, magnesium, sulfur |
| Micronutrients | Nutrients that are needed in trace amounts |
| Macronutrients | Nutrients that are needed in large amounts |
| Micronutrient examples | iron, boron, zinc, copper, chlorine |
| Function of nitrogen | Gives dark green color and improves quality of foliage |
| Nitrogen deficient symptoms | sick, yellow-green color; short stems, small leaves, pale colored leaves and flowers |
| Phosphorus function | Stimulates early formation and growth of roots |
| Phosphorus deficient symptoms | older leaves are purplish color |
| Potassium deficient symptoms | mottled, spotted, streaked or curled leaves |
| Magnesium deficient symprtoms | Interveinal chlorosis-yellowing of leaves between green veins |
| Functions of sulfur | Promotes root growth and vigorous vegetative growth |
| Complete fertilizer | 20-10-10 |
| Incomplete fertilizer | 20-10-0 |
