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Andropogon gerardii
Roots may reach depths of 2 to 4 feet at the end of establishment year. Roots of well established plants may reach depths of 7 to 8 feet. Roots can be long lived, one test indicated 81% of big bluestem roots lived for three years (Weaver 1968). According to Walter et al. (1996), root and rhizosphere overlap among neighboring plants can transfer P among species including big bluestem.
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