A rancher is interested in the ability of a grassland ecosystem to maintain primary production for cattle forage for many years. Data shows that the average precipitation and temperatures vary each year. Due to the variability in precipitation and temperatures, the grass does not always grow enough to feed all of the cattle, and the rancher bought hay to feed them. What would be the best method of land management to use to improve the stability his grassland ecosystem so that the rancher does not need to buy hay? 1 point
Plant the most drought-tolerant grasses to account for varied rainfall
Allow the cattle to only graze on one-fourth of the grassland each year
Use multiple species of grasses in his grassland pastures
Plant the most cold-tolerant grasses to account for varied temperatures