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Fertilizer Application 6.02
Are you ready to fertilize?
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Fertilizer “how-to” 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
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Ways to Fertilize Banding Sidedressing Topdressing Perforating
Broadcasting Fertigation Foliar spraying
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Banding Place a band of fertilizer about two inches to sides and two inches below seed depth Don’t place below seeds because fertilizer will burn roots
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Sidedressing Placing a band of fertilizer near the soil surface and to the sides after seedlings emerge from 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”-24” around the canopy drip line of fruit trees. Cover the holes and the fertilizer slowly releases. Typically done on fruit and nut trees
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Broadcasting Spreading fertilizer to cover the entire production area.
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Fertigation Incorporating water-soluble fertilizer into the irrigation system of greenhouse and nursery crops. Concentrated injections Proportioners or injectors used to dilute
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Proportioners Venturi-simple, inexpensive, less accurate Hozon
Miracle Gro/Scotts applicator Depends on water pressure
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Proportioners Positive-displacement is a Smith injector, expensive but very accurate Commander proportioners Physically inject and mix specific amounts of concentrations into water Commander-very accurate These are for commercial or extreme hobby growers
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Foliar spraying Spray micronutrients (like Fe and Ca) in a solution onto plant leaves Used to reverse nutrient deficiencies Fertilizer concentration cannot be too high or will lead to leaf burn
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Complete Fertilizer Contains amounts of NPK
Example: or or
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Incomplete Fertilizer
Fertilizer that is missing one of the primary macronutrients Example: or or
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Fertilizer Facts The 10 of means that of X lb bag of fertilizer, 10% is N, 10% is P and 10% is K If the ratio is and you have a 100 lb of fertilizer, what is the value in pounds of each nutrient?
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Fertilizer Ratios If you have a fertilizer that is , that is a 1:2:1 ratio. What if you have a ?
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Organic versus Inorganic
Organic was once alive More expensive Not chemically deriven Manure, vermicompost
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Inorganic Fertilizers
As the price of fuel goes up, so does fertilizer. Thus, what is the main ingredient in synthetic fertilizers? Why can they be bad for the environment?
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Soluble v. Insoluble Soluble dissolves in water
Insoluble slowly degrades Slow release fertilizers are coated with a polymer
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Who am I?
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Fertilizer: Stuff to Remember!
Soluble vs. Insoluble Organic vs. Inorganic Ratio of Fertilizer Application Mrs. Riedel loves you… most of the time.
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