Click on image to view larger version.
Fig. 2. Relationship of N fertilization rate to cover of crabgrasses [smooth crabgrass (Digitaria ischaemum), large crabgrass (D. sanguinalis), or unspecified (Digitaria spp.)] or broadleaf weeds, primarily dandelion (Taraxacum officinale), in cool-season turfgrass studies. Species of turfgrass are Kentucky bluegrass (KB, Poa pratensis), Chewings fescue (CF, Festuca rubra subsp. fallax), or tall fescue (TF, F. arundinacea). Data from Haley et al. (1985) were transformed from a 1-to-9 scale, with 1 = 0%, and 9 = 100%. Dandelion data from Murray et al. (1983) are counts per plot, not percentages.
