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Re: Rhizobium

some may have more experience so I hope this helps.  Basically if some of the
legumes being planted have been grown in the field within the last ten years then I
would say you would not need to innoculate them. Some may think ten years is a long
time but we have never seen a response from innoculating soybeans when being grown
on expiring CRP acreage even after 10 years of grass.  I would however innoculate
all of the native legumes with the proper rhizobia strains.  I am not sure just how
important soil pH is to native legumes, but rhizobia generally are not very well
suited to soil pH below about 5.5 if I remeber correctly.  I don't think the soil
pH has to be as high as 6.5 or greater as most recommend for alfalfa.  Hope this
helps and hope to learn more on the subject of rhizobia and native legumes.


Brett Roberts
State Conservation Agronomist
USDA-NRCS-Illinois

slenhart@texas.net wrote:

> I'd appreciate any comments on innoculants for legumes.  Specifically, I have
> several legumes that will be planted on land in Missouri.  Prairie Moon Nursery
> in Minnesota carries rhizobium specific to different species, including several
> that I'll be using.  Are there variations within the inoculum that would them
> inappropriate or ineffective for use in Missouri?  This is an arcane subject,
> but as long as I'm sticking with local genotype seed...
>
> ,,Scott Lenharth
> Austin TX
>
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