Alfalfa Report Yuma County, Arizona June 3, 2002 Yuma County Office Production Update: Summer Irrigation Termination - Effect on Crop: Irrigations can be withheld from alfalfa during the summer without permanent damage to stands and yield. In some cases, however, the alfalfa may require one cutting for yields to fully recover from lack of summer irrigation. Summer irrigation termination must be practiced with caution since, in a study conducted on a sand soil on the Yuma-Mesa, stands were reduced from 4 to 1.5 plants per square foot by not irrigating during the summer. The ability of an alfalfa crown to survive without irrigation during the summer may be related to many factors such as soil type, presence of subsoil moisture or a shallow water table, age of stand, cultivar, previous cutting history, maximum and minimum daily temperature, rainfall, and amount of stubble. Insect Management: Grasshoppers ( Weed Control: Some weeds have an allelopathic effect on crops
by synthesizing and releasing toxic substances that retard the growth
of other plants. This may be the case with bermudagrass (
10 Year Summary (May 21 to June 3, 1993-2002):
Issued in furtherance of Cooperative Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture, James A. Christenson, Director Cooperative Extension, College of Agriculture and Life Sciences, The University of Arizona. The University of Arizona is an equal opportunity, affirmative action institution. The University does not discriminate on the basis of race, color, religion, sex, national origin, age, disability, veteran status, or sexual orientation in its programs and activities. Any products, services, or organizations that are
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endorsement by The University of Arizona. Information provided by: Barry Tickes, btickes@ag.arizona.edu Extension Agent, Yuma County Michael Ottman, mottman@ag.arizona.edu Agronomy Specialist College of Agriculture, The University of Arizona. Eric Natwick, etnatwick@ucdavis.edu UCCE Imperial County - Farm Advisor University of California, Davis, CA. | ||||||||||||||||
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