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livingontheland - [Livingontheland] why declining yields with continuous fertilizing?

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  • From: "TradingPostPaul" <tradingpost@riseup.net>
  • To: livingontheland@lists.ibiblio.org
  • Subject: [Livingontheland] why declining yields with continuous fertilizing?
  • Date: Fri, 19 May 2006 16:03:25 -0600


from SOLVING THE MYSTERY OF YIELD DECLINE IN CROPS BY MEASURING 13C
ASSIMILATION INTO MYCORRHIZAL DNA AND RNA, Merriam Powell Center for
Environmental Research
http://www.nau.edu/~envsci/johnsonlab/research.htm

Most crop plants form symbiotic associations with arbuscular mycorrhizal (AM)
fungi. These root-inhabiting fungi usually help plants get nutrients from the
soil, but this benefit is greatly reduced by fertilization. There is
correlative evidence supporting the hypothesis that, over time, agriculture
selects species of AM fungi that can reduce crop productivity in highly
fertilized systems. It is necessary to develop new research methods to more
effectively test this hypothesis.

and FACT SHEET: Mycorrhizae

My-Core-What?
The blow-by-blow on beneficial root fungi, mycorrhizas--rocket boosters for
your plants.
http://www.newfarm.org/depts/NFfield_trials/0903/factsheet_mycorrhiza.shtml

paul, tradingpost@riseup.net
---------------
The outstanding scientific discovery of the twentieth century is not
television, or radio, but rather the complexity of the land organism. Only
those who know the most about it can appreciate how little we know about it.
- Aldo Leopold in Round River, 1933




  • [Livingontheland] why declining yields with continuous fertilizing?, TradingPostPaul, 05/19/2006

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