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Species Interactions with Quackgrass and Their Effects on Forage Production

Dep. of Horticulture and Crop Science, The Ohio State Univ., 2021 Coffey Rd., Columbus, OH 43210

View larger version (21K): [in this window] [in a new window]   Fig. 1. Total yield (A), quackgrass rhizome mass (B), and total root mass (C) for proportional mixtures of quackgrass (QG) and orchardgrass (ORG), or QG and white clover (WC), under 2-wk and 6-wk cutting. Symbols are means of 6 observations (3 replicates and 2 experiments); the analysis of variance is given in Table 3.

View larger version (26K): [in this window] [in a new window]   Fig. 2. The effect of number of species planted on yield (g m–2), and rhizome and roots mass (g m–2) of 8 mixtures of quackgrass (QG) and orchardgrass (ORG) and/or white clover (WC) at 2-wk or 6-wk cutting. Symbols are means of 6 observations (3 replicates and 2 experiments); *, significance of regression P 0.05.