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94 Cards in this Set
- Front
- Back
Ideal pH for transplant and seedling care |
5.5 - 6.5 |
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Bicarbonates measure water ______ |
Hardness (>400 ppm) and softness (100 ppm) |
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Electrical conductivity (EC) measures |
Salinity |
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Fertilizer can increase |
Salinity |
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Transplants should be kept ____ with time to ______ to avoid _____ |
Moist; dry between waterings; disease |
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Seedlings (do/do not) need fertilizer immediately |
Do not |
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It is safe to fertilize seedlings after _____ |
Several sets of true leaves have grown |
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Fertigation |
Fertilization + Irrigation simultaneously |
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Nutrient analysis |
Guarantees a certain amount of nutrients within a fertilizer |
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Fertilizer injector |
Injects fertilizer directly into water line |
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Siphonmixer |
Fixed, 20:1 fertilizer injector |
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Dosatron |
Expensive but adjustable fertilizer injector (1:500 to 1:66) |
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Steps to prepare a fertilizer solution |
1. Determine ppm and amount of solution needed2. Set up ratio to determine how much fertilizer to use3. Determine how much of your fertilizer will yield desired nutrient amount |
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To make 10 gallons of a 200 ppm solution using 20-20-20 fertilizer |
Solve based on N (NPK are all same-202020)200 parts/1 million parts = X oz of N/10 gallon solution (1 gallon = 1280 oz)200 x 1280 / 1 million = .256 oz N20 parts N/100 parts fertilizer = .256 oz N / X oz fertilizer needed.256 x 100 / 20 = 1.28 oz of fertilizer needed to yield 20-20-20 in 10 gallon solution |
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If 1.28 oz of fertilizer are needed in 10 gallon solution to yield 200 ppm NPK, how many oz of fertilizer should we add if we want to use a siphonjet mixer? |
20:1 injector > 20 +1 =21 21 x 1.28 = 26.88 oz of fertilizer |
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For an injector, fertilizer solution should be (more/less) concentrated because _____. |
More; the injector dilutes the solution for you |
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To find the final fertilizer amount when using an injector, ______ |
Add both sides of injector ratio (20:1) and multiply by amount of fertilizer needed to yield desired concentration |
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_____ serves as a visual indicator of ppm in fertilizer solutions |
Blue dye (darker = more concentrated) |
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Proper fertilizer schedules |
Low ppm (50-100) every watering or high ppm (100-150 once a week) |
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Etiolation |
Stretching out due to excess heat, over fertilization or over watering, or low light |
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Hardening off |
Withholding water and fertilizer, increase temp, expose to air movement or the outdoors |