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32
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Active since
1992
R. Penner is an author specializing in nutrient deficiency effects, boron availability, and plant nutrition.
Publications per year
1992–1992
Broccoli (<i>Brassica oleracea</i> var. <i>italica</i>) cultivar response to boron deficiency
Barry J. Shelp, R. Penner, Zhen-Ying ZHU · Canadian Journal of Plant Science · 1992 · 32 citations
Agriculture, Agronomy, Plant Sciences +16
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