Planting & Soil第 30 / 100 题
A 50-pound bag of 20-0-10 fertilizer contains how many pounds of actual nitrogen?
a.10 pounds
b.20 pounds
c.5 pounds
d.1 pound
解析
Actual nitrogen equals the bag weight times the nitrogen percentage, so 50 pounds times 0.20 equals 10 pounds of nitrogen. Landscapers use this calculation to apply the correct pounds of nitrogen per 1,000 square feet. Knowing actual nutrient content prevents over- or under-application.
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