Hoagland,D/ennis/ R/obert/
The effect of the plant on the reaction of
the culture solution.
8:o Berkeley,California 192^
^Publications^ University of California.The
Agricultural experiment station of the colle-
ge of agriculture. Technical paper. 12.

Hoagland , D/ enni s/ R/ ob er t/ —
The effect of the plant on the reaction of
the culture solution.
8:0 Berkeley , California 1923
-Publications, University of California.The
Agricultural experiment station of the colle-
ge of agriculture. Technical paper. 12.
Zeza