application of fertilizers and calculation of fertilizers dose
DESCRIPTION
This document describes about fertilizer dose to cropsTRANSCRIPT
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Application of Fertilizers By- Vigyan ashram, Pabal.
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Application Procedures
•Banding•Sidedressing•Topdressing•Perforating•Broadcasting•Foliar spraying•Fertigation
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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.
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Sidedressing
•Placing a band of fertilizer near the soil surface and to the sides after seedlings emerge from the soil.
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Topdressing
•Mixing fertilizer uniformly into the top one to two inches of growing media around the plant.
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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.
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Broadcasting
•Spreading fertilizer to cover the entire production area
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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.
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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
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Venturi-type
•Simple and inexpensive•less accurate•depends on water pressure in the hose
and in the smaller tube to proportion•Example: Hozon
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Positive-displacement
•More expensive•very accurate•physically inject and mix specific amounts
of concentrated solution and water•Examples: commander proportioners,
and Smith injectors
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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.