The site listed below has on on-line version of Soil Cation Ratios for Crop
Production--a University of Minnesota Extension Publication that includes
references.
http://www.extension.umn.edu/DC/item.html?item=6437
It argues that calcium/magnesium ratios do not affect yield. However, some
people argue that nutrient ratios can affect soil tilth and crop quality,
though I do not know of supporting research.
-Ann Lewandowski
At 09:13 AM 1/13/99 -0500, you wrote:
>Hi everyone,
>
>Pardon me if this topic came up recently and I wasn't paying attention --
Does anyone know of scientific articles which deal with nutrient balance in
soils? How much of each nutrient in what proportions are best for crop
growth? I can't seem to turn anything up on the databases.
>
>Thanks,
>Victoria
>*************************************
>Victoria Mundy
>Dept. of Agronomy
>N106R Ag. Sci. North, UK
>Lexington, KY 40546-0091
>606/257-2103
>*************************************
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______________________________________________
Ann M. Lewandowski
NRCS Soil Quality Institute
Department of Soil, Water, and Climate
1991 Upper Buford Circle
University of Minnesota
St. Paul, MN 55108-6028
alewand@soils.umn.edu
612-624-6765
fax: 612-625-2208
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