The May, 2010 issue of Acres/USA magazine is devoted to cattle and grazing. When this magazine arrives in the mail, everything else goes on hold while I read through it, seeing which articles I want to read in depth later.
This issue has an article on spraying raw milk in pastures as a fertilizer. The evidence shows that 3 gallons of milk to 17 gallons of water per acre has wonderful results. Besides growth, it seems that grasshoppers can't live because of the high sugar content in the milk.
As far as grass production is concerned, pastures sprayed at the begining of the season (april-may) in forty five days had an extra 1,200 bounds of grass on a dry matter basis and the ability of the soil could absorb double the amount of water. Sodium in the soil is reduced by half.
This study is a small one and was encouraged by an extension agent. He suggests giving it a try. He also suggests offering your local dairy farmer double or triple what is being paid them by the local milk plant. Even at this cost it is a much more economical soil enhancer than conventional fertilizer.
Speaking personally, if it were up to me, I would be careful who I bought the milk from. It would not have to be an organic dairy, but I would not consider using milk from a concentrated animal operation becuae of the higher antibiotic requirements to keep animals healthy. This is the same reason I would not care to use manure from such a place because of the medicines and chemicals that go into the lagoons. Others might not care where it comes from. The reporter was not specific about what kind of dairy the milk came from. But they emphasize that it is very important that the milk is raw and not pasturized, to encourage microbial activity.
I wonder if this could be tried on other fields? If it worked, could this be a help to the struggling dairy farmer?