sjohnson at ceeb.uky.edu
Mon Nov 25 13:54:22 EST 1996
I've been thinking about a problem concerning the mobility of
nutrients through soil. Nitrogen, for example, is thought to be a
mobile nutrient which moves to plant roots by mass flow, whereas
Phosphorous adsorbs to soil particles and moves to plants via
diffusion. Under water stressed conditions where the availability of
N vs P has not changed, I would expect N to become more limiting
than P through decreased availability.
Does this seem reasonable?
How could I test this prediction?
Any thoughts on this question will be appreciated.
Please send responses to sjohnson at ceeb.uky.edu.
Sandra Johnson. Ph.D.
University of Kentucky
101 Morgan Building
Lexington, KY 40506
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