Re: innoculating soil with protozoa
Gary Matson (firstname.lastname@example.org)
Sun, 06 Dec 1998 17:53:23 -0800
In reference to the clip below, could someone explain what the
implications really are regarding management of soil P? It has been my
understanding that phosphorous essentially does not leach from soils,
and that the way P gets into waterways to cause hypertrophic problems is
from direct soil erosion into the water, thus physically carrying the p
ions in their adsorbed state into the waterway. Have I missed
something? Is there soil so sandy and lacking in clay that leaching of P
into waterways is a real problem? Is this organic farmer actually
losing soil to erosion that somehow would be alright if there were less
P in it? Somehow I think there must be a lot more to this story. I
admit to some parochialism, coming from red clay landscape that is
perpetually low in Phosphorous, but never before have I heard of over
phosphorous being a problem, nor have I ever heard a reference to
groundwater pollution with Phosphorous as with Nitrogen or pesticides.
Some background please? Thanks, Gary Matson
joel b gruver wrote:
> Hello to all...
> I talked to a MD organic vegetable farmer today that in the past has
> relied nearly entirely on heavy applications of compost to meet his
> fertility needs.
> As a result his soils test very high in P... As mandatory P based nutrient
> management looms over his head, (mandatory in MD as of 2004) he is in
> somewhat of a quandry as to how he will meet future crop N needs if he
> greatly reduces his reliance on compost (which has a ~1:1 N:P ratio).
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