|
Evansville, WI | Most studies will tell you there is no difference as one rapidly converts to the other. Generally the only ones claiming one is better are selling that product and at a typically higher price. Most dry fertilizers are ortho, most liquids in the US are a blend of ortho and poly. The hydrolysis of poly to ortho takes approximately one week after application, therefore little difference in perfomance would be expected.
http://www.extension.umn.edu/cropEnews/2002/02MNCN05.htm | |
|
Orthophosphate or Polyphosphate
