An ecological and grazing capacity An ecological and grazing capacity study of the native grass pastures in Southern Alberta, Saskatchewan and Manitoba ecologicalgrazin00clar Year: 1942 18 After the field work is completed a report is prepared discussing the findings of the survey. This report presents such information as the composition of the vegetational cover and its average yielding ability, the carrying capacity of the area, a discussion of the factors which influence productivity and recom- mendations regarding pasture management. Copies of these reports are sent to those who administe
An ecological and grazing capacity An ecological and grazing capacity study of the native grass pastures in Southern Alberta, Saskatchewan and Manitoba ecologicalgrazin00clar Year: 1942 18 After the field work is completed a report is prepared discussing the findings of the survey. This report presents such information as the composition of the vegetational cover and its average yielding ability, the carrying capacity of the area, a discussion of the factors which influence productivity and recom- mendations regarding pasture management. Copies of these reports are sent to those who administer or manage the pastures concerned. Figure 9.—Instrument used to determine the composition of the vegetational cover by the point method. Methods of Sampling During the years 1937 to 1939 the area list method was used to sample the vegetation. While this method has been used successfully for certain grassland studies, particularly for detailed investigations on permanent plots, it was found to be less satisfactory for survey work. Consequently in 1939 a study was made of other methods in an effort to choose one which would be equally accurate, yet could be employed more readily in such survey studies. The one selected as being of greatest promise was that one known as the point method (9). This method has been used during the summers of 1940 and 1941, and was found to be satisfactory on the grassland associations involved in the survey. The point method consists of taking a number of points at random, and in recording the vegetation which is hit as a pin is projected into the sward from above. The apparatus used is a wooden beam mounted on supports and carrying 10 metal pins so held that they slide up and down in a set course. Thus the apparatus plots a broken line transect of 10 points (Fig. 9). A plant is hit when the point of a pin touches its base. Hits for each species are recorded, and are expressed in terms of percentage of total number of points studied. Thus three
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