. Effects of different systems and intensities of grazing upon the native vegetation at the Northern Great Plains Field Station . Fig. 2.—Diagram showing the order of grazing the three divisions of the deferred and rota- tion pasture for a complete cycle and the first season of the next. Columns A, B, and C represent the three divisions of the pas- ture. Each year is separated into three periods indicative of spring (Sp), summer (S), and fall (F) grazing periods. Grazing periods are shaded, rest periods unshaded. The first part of the diagram designated as section 1 illustrates the plan being
. Effects of different systems and intensities of grazing upon the native vegetation at the Northern Great Plains Field Station . Fig. 2.—Diagram showing the order of grazing the three divisions of the deferred and rota- tion pasture for a complete cycle and the first season of the next. Columns A, B, and C represent the three divisions of the pas- ture. Each year is separated into three periods indicative of spring (Sp), summer (S), and fall (F) grazing periods. Grazing periods are shaded, rest periods unshaded. The first part of the diagram designated as section 1 illustrates the plan being fol- lowed ; section 2 represents a more uniform plan that has been worked out. These sec- tions differ in the order of the rotation. In section 1 the order of fall grazing is C, B, A and in section 2 G, A, B. 9 Jardine. James T. Improvement and management of native pastures in the West. In Yearbook, U. S. Dept. Agr., 1915, pp. 299-310, pis. 69-72. 1916. and Anderson, Mark. Range management on the national forests. U. S. Dept. Agr. Bui. 790, 98 pp., 4 figs.,. 32 pis. 1919. 47006—23-
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