. Effects of different systems and intensities of grazing upon the native vegetation at the Northern Great Plains Field Station. Grazing; Forage plants; Agricultural systems. EFFECTS OF DIFFERENT SYSTEMS OF GRAZING. 13 well and all other pastures. The cattle in this pasture are there- fore more often disturbed than those in any other pasture, while those in the 70-acre pasture are the least annoyed. The gains of the cattle in the 50-acre pasture show that they did not have enough feed to carry them through September with full gains. In the 30-acre pasture the cattle did not have sufficient fee
. Effects of different systems and intensities of grazing upon the native vegetation at the Northern Great Plains Field Station. Grazing; Forage plants; Agricultural systems. EFFECTS OF DIFFERENT SYSTEMS OF GRAZING. 13 well and all other pastures. The cattle in this pasture are there- fore more often disturbed than those in any other pasture, while those in the 70-acre pasture are the least annoyed. The gains of the cattle in the 50-acre pasture show that they did not have enough feed to carry them through September with full gains. In the 30-acre pasture the cattle did not have sufficient feed to carry them through July with normal Fig. G.—A close view of the rack on the platform of the scales. The gates are operated from the outside by means of ropes and pulleys. Table 2.—Average monthly and seasonal gains of 2-year-old steers, showing the increased weight obtained in the pastures continuously grazed for six years, 1916 to 1921. inclusive, and in the rotation pasture for four years, 1918 to 1921, Average total gains or losses1 (pounds). Monthly. Pasture. Average number. • Sep- Per May. June. July. £££ tern- Octo- pas- ber. ber. ture. gust. Per 100; Per Steers Per Per pounds . J[, per Days head. acre. live A.^nJ pas- grazed. weight. daily. 100 acres * 347 1,084 628 70 acres *432 1,158 601 50 acres *388 1,165 593 30 acres "362 1,088 438 Rotation, 70 acres '843 1,364 710 540 573 568 210 *- 403 47 4;* -24 138 -217 -133 6-285 2, 575 2,942 2,441 1,803 '12 314 -41 3,450 267 1. 150 150 148 111 149 1 Part yearlings were used in 1916 and 1918. The gains in the table have been reduced to a 2-year-old basis, differing but slightlv from those obtained. When yearlings were used the number of cattle were increased to bring the total initial weight up to about 7,500 pounds. * A minus (—) sign represents a loss. 1 This average does not equal
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