[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [SANET-MG] Phosphorus availability (was Loss of Minerals)
Edna,
> I'd like to pick up on a hint that someone mentioned in this
> thread. I'd like to learn more about how phosphorus changes
> from "available" to "unavailable." I've long believed that
> microbs are involved but would like to know more about how to
> encourage the conversion to "availability."
At the Agronomy Society meetings last month in Seattle I heard an
interesting talk by Shabtai Bittman (Agassiz, British Columbia) "Do
arbuscular mycorrhizae improve P uptake and growth of corn on manured
soils?" He showed that you can get early season deficiency even when
there is plenty of P in the soil if the VA mycorrhizae are disrupted.
Corn, and many crops are dependent on these fungi to get P from the
soil. Tillage chops up the network and it takes a few weeks to
reestablish it. Dr. Bittman knows a lot about mycorrhizae, and might
be a good source of information.
> As for the Loss of Minerals thread, I'm disappointed at how
> quickly it degenerated into personal attacks and counter attacks.
Yeah, all this stuff is interesting technically, I am more intereted in
that than in personal attacks.
Dale
__________________________________
Do you Yahoo!?
Read only the mail you want - Yahoo! Mail SpamGuard.
http://promotions.yahoo.com/new_mail
********************************************************
To unsubscribe from SANET-MG:
1- Visit http://lists.sare.org/archives/sanet-mg.html to unsubscribe or;
2- Send a message to <listserv@sare.org> from the address subscribed to the list. Type "unsubscribe sanet-mg" in the body of the message.
Visit the SANET-MG archives at: http://lists.sare.org/archives/sanet-mg.html
For more information on grants and other resources available through the SARE program, please visit http://www.sare.org.