i'm in florida which means, i, for the most part, garden in sand. no matter how much organic matter we till in, it's still sand. we have some guys, digging a pond for us in our front pasture. they've hit clay. my question is this: would some of that clay, mixed with the top soil they've scraped off, be of any benefit to my garden? i was thinking in small amounts, it would improve the tilth and help the soil hold water. am i totally off base here? thanks for reading this!