[tomato] Green Manure.

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Thomas,

You are right about the fowl manures and guano being very concentrated
in P.  Fortunately, P is highly susceptible to being bound in the soil
environment as long as the soils aren't anaerobic.  Anaerobic soils is
the only instance that I'm aware of where the mobility P has become a
problem.  However, nearly all the soils here in Texas are severely
limited in available P as well.  Most lawn and crop fertilizer
recommendations are for P based fertilizers.

Could the problem with the lack of break down of the previous wheat crop
be that the soils are deficient in Carbon??  I do remember talking to
some folks on a similar subject about the Klamath valley in Oregon and
the fact that if they leave any crop residue in the field that it will
turn into a black slime in the surface soils do to the lack of organisms
and i'm sure they said that the soils were severely lacking in carbon.

Thanks,

Paul Reynolds
Environmental Agronomist
Austin Texas

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