Application of fertilizers and calculation of fertilizers dose

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This document describes about fertilizer dose to crops

This document describes about fertilizer dose to crops

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  • 1. Application of Fertilizers By- Vigyan ashram, Pabal.
  • 2. Application Procedures • Banding • Sidedressing • Topdressing • Perforating • Broadcasting • Foliar spraying • Fertigation
  • 3. Banding • Placing a band of fertilizer about two inches to the sides and about two inches below seed depth. • DO NOT place below the seeds because fertilizer will burn the roots.
  • 4. Sidedressing • Placing a band of fertilizer near the soil surface and to the sides after seedlings emerge from the soil.
  • 5. Topdressing • Mixing fertilizer uniformly into the top one to two inches of growing media around the plant.
  • 6. 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.
  • 7. Broadcasting • Spreading fertilizer to cover the entire production area
  • 8. Foliar Spraying • Spraying micronutrients in a solution directly on plant leaves. • Quickly corrects nutrient deficiencies • Fertilizer concentration should not be too high or leaf burning will occur.
  • 9. Fertigation • Incorporating water-soluble fertilizer into the irrigation system of greenhouse and nursery crops. • Concentrated solutions usually pass through proportioners or injectors to dilute to the correct ratio. ▫ Venturi-type ▫ Positive-displacement
  • 10. Venturi-type • Simple and inexpensive • less accurate • depends on water pressure in the hose and in the smaller tube to proportion • Example: Hozon
  • 11. Positive-displacement • More expensive • very accurate • physically inject and mix specific amounts of concentrated solution and water • Examples: commander proportioners, and Smith injectors
  • 12. Rules for applying fertilizers • Fertilizers are applied as basal and spilt dose to avoid leaching and soil fixation losses. • Method used should be practical, effective and cost efficient. • Method used affects nutrient availability for plant use. • Fertilizer must be dissolved and reach plant roots.