For an 18 yr rotation study in Canada see: CAN J PL SCI 68,1(1988).
ACTA AGRIC SCAND 41,119(1991) rotation/manure expt.
BIOL FERTIL SOIL 11,234(1991) on earthworms
BIOL FERTIL SOILS 12,81(1991), germany, green manure
SOIL AND TILLAGE RES 22,145(1992), rotation, no-till
SOIL TILL RES 31,149(1994) no-till soil quality
Have you seen Janke et al., Long-term, low-input cropping systems
research. In: Sust. Ag. Res. and Ed in the field, Nat. Academy Press. (1991)?
Hope these help, good luck, Hector
Vegetable Extension Specialist
Horticulture, University of Hawaii at Manoa
On Wed, 27 Mar 1996, Diana Friedman wrote:
> I am currently preparing a manuscript on a long term farming systems
> project at UC Davis. I am interested in finding out about any other
> current experiments comparing organic/low input/conventional systems.
> A literature search has not turned up a lot of information, and so I am
> wondering if most of these experiments are so new, that there is still
> not much published. I am specifically interested in experiments that
> include corn, but any references comparing these systems would be helpful.
> I am mostly interested in experiment station based work, although
> side by side farm comparisons would be useful as well.
> I have a bit of information from previous years, from work by Lockeretz,
> Sahs, Reaganold, as well as Rodale. Any information people might
> have about other long term trials, either published, or in progress,
> would be greatly appreciated.
> Thanks in advance,
> Diana Friedman
> Research Manager
> SAFS Project-UC Davis