. Effects of different systems and intensities of grazing upon the native vegetation at the Northern Great Plains Field Station. Grazing; Forage plants; Agricultural systems. 12 BULLETIN 1170, U. S. DEPARTMENT OF AGRICULTURE. are not weighed until it has been determined that they have had sufficient water. They are weighed during the same time* of day at each weighing. If the weights at the end of any period -appear abnormal in any respect, they are checked the following day. Figure 5 shows the corrals which are used to hold the cattle at weighing time. Figure 6 gives a near view of the rack a
. Effects of different systems and intensities of grazing upon the native vegetation at the Northern Great Plains Field Station. Grazing; Forage plants; Agricultural systems. 12 BULLETIN 1170, U. S. DEPARTMENT OF AGRICULTURE. are not weighed until it has been determined that they have had sufficient water. They are weighed during the same time* of day at each weighing. If the weights at the end of any period -appear abnormal in any respect, they are checked the following day. Figure 5 shows the corrals which are used to hold the cattle at weighing time. Figure 6 gives a near view of the rack around the scales. The gates to this rack are operated by means of ropes and pulleys, which greatly add to convenience in weighing the cattle. GAINS OF THE CATTLE. The gains of the cattle will be briefly discussed in order to show more clearly the relation between the quantity of native forage avail- able for grazing and its influence upon the seasonable gains of the cattle. When the experiment started it was not definitelv known how. Fig. 5.—Corrals used to hold the cattle at weighing time. The scales are shown at the right. much gain per head the native forage of this area was capable of producing. The average gains of the cattle for the period the experi- ment has been in progress are shown in Table 2. It will be noted that the highest gains per head are secured in the 100-acre and the 70-acre pastures. The gains of the cattle in these two pastures are now looked upon as the normal maximum gains per head that may be expected from the native forage. Both of these pastures had abun- dant feed left standing at the close of each season. Therefore, the quantity of available feed could not have been a limiting facto; m the production of gains. This is also further shown by the fact that the gains in these two pastures have been practically equal. The small difference in favor of the 70-acre pasture is considered of minor significance. The gains in the 100-acre pasture may be infl
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