HORTICULTURE SCIENCE
FLORICULTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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You want to mix 20-10-20 fertilizer concentrate in a 25-gallon tank that will be injected into the irrigation line through a Dosatron proportioner at a rate of 1:100. You will apply 150 ppm N to the crop. How much fertilizer do you weigh out for this concentrate tank, in pounds? 1 lb. has 16 oz.
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0.63 lbs. 20-10-20 fertilizer in 25-gallons
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15.6 lbs. 20-10-20 fertilizer in 25-gallons
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62.5 lbs. 20-10-20 fertilizer in 25-gallons
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250 lbs. 20-10-20 fertilizer in 25-gallons
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Explanation:
Detailed explanation-1: -The injection rate can be expressed as a ratio (1:50, 1:100, 1:200, etc.) or as a percentage (2%, 1%, 0.5%, etc.). The equivalence between those two are 1:50 = (1 unit/50 units)*100 = 2%; 1:100 = (1 unit/100 units)*100 = 1%; and 1:200 = (1 unit/200 units)*100 = 0.5%.
Detailed explanation-2: -Obtain the amount of nitrogen (N), phosphorous (P) and potassium (K) in the fertilizer from the fertilizer’s label. Determine the mass (in grams) of fertilizer to dissolve per liter of water to achieve the desired ppm value by dividing by the percent (in decimal form) of the desired nutrient, then divide by 1, 000. More items
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