What's in this Horse Manure in my garden?
by David Hughes
(Linton, Indiana, USA)
I have located a good local source of horse manure for my garden. I haul about a cubic yard of manure mixed with straw and hay every week. I have noticed that, occasionally, there is a grey coarse granular material mixed in the manure. My horse owner friend indicated that he buys this product from the local feed store and spreads it on the horse stall floors to absorb urine and counteract any ammonia smell. It looks somewhat like 'kitty litter' but it clumps differently. My question is .... what is this stuff and will it harm my soil? Anyone have any experience with this product? Do I need a new source of manure?