Evaluation of Sharpen (saflufenacil) Use in Established Alfalfa
Principle Investigator: Steve Orloff, County Director/Farm Advisor, Siskiyou County, Yreka
- Evaluate the safety of Sharpen to alfalfa.
- Determine whether crop phytotoxicity could be reduced with different application timings.
- Evaluate the efficacy of Sharpen for controlling the spectrum of weeds encountered in Intermountain alfalfa fields.
Alfalfa Variety Evaluation in Mountain Valleys of Northern California
Principle Investigator: Dan Putnam, Extension Agronomist, Dept. of Plant Science, UC Davis; Steve Orloff, County Director/Farm Advisor, Siskiyou County, Yreka; Craig Giannini, UC SRA, UC Davis
- Evaluate certified cultivar differences in alfalfa forage yield, quality, and persistence, and to communicate these results to clientele
- Develop and provide forage yield and performance data on alfalfa experimental germplasm to public and private alfalfa scientists
Cutting Schedule Effects on Reduced Lignin & Conventional Alfalfa
Principle Investigator: Steve Orloff, County Director/Farm Advisor, Siskiyou County, Yreka; Dan Putnam, Extension Agronomist, Department of Plant Sciences, UC Davis
- Determine the effect of a 3-cut versus 4-cut harvest schedule on rate of forage quality change of genetically engineered low lignin alfalfa compared to the null that does not carry the trait and compared with a commercial standard
- Determine the appropriate cutting management schedule for low-lignin alfalfa compared with conventional non-genetically engineered alfalfa
Assessment of Alfalfa Irrigation Needs in the Klamath Basin
Principle Investigator: Steve Orloff, County Directory/Farm Advisor, Siskiyou County, Yreka; Daniele Zaccaria, Extension Water Management Specialist, UC Davis.
- Determine the effect of irrigation quantity on alfalfa yield in the Klamath Basin.
- Evaluate the need for one versus two irrigations per cutting.
- Measure the contribution from dew to alfalfa ET over the growing season.
- Compare soil moisture readings with Watermark sensor versus newer technology from Acclima.
Alfalfa Germplasm Evaluation-Fall Dormancy
Principle Investigator: Charles Brummer, Director, Plant Breeding Center, UC Davis; Steve Orloff, County Director/Farm Advisor, Siskiyou County, Yreka; Dan Putnam, Extension Agronomist, Department of Plant Science, UC Davis.
- To develop a measurement method to assess dormancy in swards.
- To evaluate fall dormancy of the standard check cultivars and selected other modern cultivars in both swards using the new protocol and in spaced plants using the current protocol.
Investigation of Glyphosate Injury to Roundup Ready Alfalfa
Principle Investigator: Steve Orloff, County Director/Farm Advisor, Siskiyou County, Yreka; Rob Wilson, Director/Farm Advisor, IREC, Tulelake.
- To better understand the conditions (environmental and management) that give rise to crop phytotoxicity from glyphosate.
- To determine the effect of application timing, alfalfa growth stage, and age of the stand on alfalfa injury level.
- To evaluate the effects of the degree of the frost, frost frequency, and the timing of the frost relative to the glyphosate application on the severity of the injury.
- To evaluate whether these injury symptoms can occur in fall as well as spring.
- To compare the susceptibility of different RR alfalfa cultivars.
- To develop management practices that can be employed to avoid injury.