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The Relation of the Kind of Pasture Crop to the Weed Content of the Forage

Illinois Agricultural Experiment Station, Urbana, Illinois

ABSTRACT

Weed infestation constitutes a serious problem in dairy cattle pastures. Heavy weed growths apparently decrease yields of grasses and legumes, render forage unpalatable and in some cases the consumption of weeds produces undesirable flavors in milk.

EXPERIMENTAL METHODS

The weed content of the forage of several pastures was determined over an eight-year period (1935–1942 inclusive). Yields of forage and of weeds were determined from samples of the forage harvested at approximately monthly intervals. The first sample was taken during the last week of April or first week of May (just prior to turning the cattle to pasture) and the last sample of the season was taken close to the time pasturing ended, which usually was about October 1.

Only one area at each sampling location was harvested on the first sampling date. During the taking of the first samples, two reinforced wire cages, each about 4' x 4' in size, were placed at each sampling location.