The chemical response of two species of annual range plants, soft chess and broad-leaf filaree, to nitrogen and potassium fertilization was studied in a field plot trial in Amador County, California. Heavy losses of cows due to grass tetany have been reported from that vicinity in recent years. The K/(Ca + Mg) ratio in soft chess was significantly higher than that in broad-leaf filaree, and fertilization with N and K increased the ratio in both species. Fertilization increased the concentration of K in broad-leaf filaree, but had little effect on the concentrations of Ca and Mg. In contrast, fertilization decreased the Ca and Mg percentages in soft chess but did not change the K concentration. The presence of alkaloids in soft chess was detected by a "spot-test" technique. This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries. The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from OJS platform August 2020
Scholarly peer-reviewed articles published by the Society for Range Management. Access articles on a rolling-window basis from vol. 1, 1948 up to 5 years from the current year. Formerly Journal of Range Management (JRM). More recent content is available by subscription from SRM.