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I know the approximate weight of my window box (15 lbs) filled with soil (20lb/cu foot*1.91 cu ft=38lbs). Does anyone know a calculation to estimate how much the soil will be when wet? I know water is 62 lb/cu foot but what is the ratio of soil to water in a big rain assuming its draining properly?
I saw one calculation on another site that said 120 lb/cu foot for wet soil but my nursery man says that's way too high for potting soil. I realize that it depends on density of soil and drainage but I thought there might be a guideline out there somewhere.
thanks!
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