Browsing Journal of Range Management, Volume 23, Number 6 (November 1970) by Issue Date
Now showing items 21-22 of 22
Grazing Effects on Runoff and Vegetation on Western South Dakota RangelandFour 2-acre watersheds were established in 1962 on each of three pastures that had been grazed at different intensities (heavy, moderate and light) since 1942. These watersheds were located at the Cottonwood Range Field Station, Cottonwood, South Dakota. The mean seasonal runoff from May 14 through October 31 for 1963 through 1967 was 0.79, 0.56 and 0.42 inch for the heavily, moderately and lightly used watersheds, respectively. The mean weight of live and dead standing crop of vegetation plus mulch in late July was 1,752, 2,092 and 3,700 pounds per acre for the heavily, moderately and lightly used watersheds, respectively.
Grass Seedling Emergence and Survival from FurrowsIntermediate wheatgrass was seeded in 8 different furrow conditions for 5 years at 8,400 feet elevation and crested wheatgrass for 3 years at 4,800 feet elevation. At the high elevation best seedling emergence was from level and from 1- and 2-inch furrows. Plant survival was best from these 3 positions and from the bottom and north exposure of 4-inch furrows. The south exposure and ridge of 4-inch furrows were poorest in plant survival. At the lower elevation, plant emergence and survival were the best on the level, 1-, 2-, and 4-inch furrows and poorest on the ridge and north and south exposures. In an earlier study .36 plants/foot of drill row emerged and .07 survived in 4-inch furrows. On the ridge between, 1.62 plants/ft emerged and .22 survived. In these studies, the deep furrows were no better for seedling emergence than shallow furrows and the level.