A simulated summer cloud seeding program was conducted for 4 years on a Festuca idahoensis-Agropyron spicatum grassland. Production and phenologic responses were essentially nil when plots were given 1.1, 1.2, 1.4 times natural rainfall on a per storm basis by sprinkler irrigation. Watering at the rate of 5 cm/week extended the flowering period in only one species, Tragopogon dubius; extended the green leaf season in most species; and increased the production of only three species, Festuca idahoensis, Balsamorhiza sagittata, and Tragopogon dubius. The increased production occurred only in the year following irrigation and may have been due to increased plant reserves and vigor. It appears that summer cloud seeding programs will have little or no positive effect on production in this vegetation type. 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.