Synopsis Bentgrass completely dominated mixtures in which it was seeded and spread into other plots. Merion bluegrass and red fescues were more resistant to invasion than common Kentucky bluegrass. Invasion occurred less at mowing height of 2 inches than at ¾ inch.

Synopsis A comparison of 6 cutting schedules with 3 phosphorus levels indicated that Vernal alfalfa produced maximum dry matter when cut 3 times annually. When cut 4 times the total protein production was the same but the percent protein was higher. Phosphorus applications helped to overcome detrimental effects of severe cutting schedules.

The persistence of birds foot trefoil as a pasture legume grown with Kentucky bluegrass was studied for a 6‐year period. The inclined point quadrat was used to measure changes in the trefoil stands as influenced by grazing system, species of grazing animal, and plant growth habit. Trefoil was shown to be a long‐lived perennial. Rotational grazing was necessary for trefoil persistence under grazing; the trefoil stand was sharply reduced under continuous grazing. The species of grazing animal was not a major factor in trefoil persistence. Semiprostrategrowing ‘Empire’ was found to persist slightly better than upright‐growing ‘Viking’.

Synopsis During the first grazing year, a Ladino clover‐bluegrass mixture was more productive in terms of carrying capacity, gain per acre, and TDN consumption per acre than an Italian birdsfoot trefoil‐bluegrass mixture. The trefoil mixture was more productive the remaining two years of the test. Ladino clover was eliminated from the mixture by drouth. Continuous grazing killed the birdsfoot trefoil. The trefoil remained in the mixture when grazed with a rotation system of about two weeks grazing and four weeks rest.

B IRDSFOOT trefoil has gained popularity as a permanent pasture legume. Also it has had limited use as a hay crop (4). Some workers have found that birdsfoot trefoil can tolerate more severe cutting schedules than certain other legumes (2). The extent to which birdsfoot can tolerate severe management might well be affected by the competitive nature of an associated grass (4). Generally considered less competitive than other legumes, birdsfoot trefoil is commonly seeded with less vigorous grasses such as timothy or Kentucky bluegrass (3). In Ohio, timothy and Kentucky bluegrass, which are commonly used with trefoil, do not produce adequately during summer months. Orchardgrass, which may grow vigorously throughout the season, is a severe competitor and is generally not recommended for use with birdsfoot trefoil. Late maturing strains of Orchardgrass, while fully as vigorous in summer growth, are less vigorous in early spring than are common strains of Orchardgrass (5). For this reason late-blooming strains of Orchardgrass should be less competitive than common strains.