Effects of covering materials and incorporated herbicides on lettuce stands under three irrigation treatments
L. J. Booher
Authors AffiliationsDavid Ririe is Farm Advisors, Monterey County; Harry Agamalian is Farm Advisors, Monterey County; Lawrence J. Booher is Extension Irrigationist University of California, Davis; Clay Brooks is Agricultural Engineer, University of California, Davis.
Hilgardia 22(2):13-15. DOI:10.3733/ca.v022n02p13. February 1968.
Current Cultural Practices in California lettuce require a thinned stand with single plants spaced 12 to 14 inches apart on a 40-inch double-row bed. The ideal situation would be to plant the precise number of seeds to obtain such a stand, but the many hazards to germination, emergence, and plant survival make it impossible to plant consistently to a stand. At present, it appears more practical to precision-plant fewer seeds than are now planted commercially—and then thin to the desired stand with a selective thinner. This is a progress report of work to develop such a planting system. Factors studied were irrigation techniques, chemical weed-control treatments, and the use of covering materials for soil-crust prevention. (Two planters were used, but no effort was made to compare the two machines.)
Also in this issue:Fuel conditions and fire hazard reduction costs in a giant sequoia forest
Greenhouse assays diagnose sugar beet problems in delta soils
Influence of feedlot pen design and winter shelter on beef cattle performance
Weeds in california fruit crops …a summary of problems and herbicide possibilities
Effects of alar and top removal on yield of fresno strawberries at three digging dates
Nitidulid beetles infesting California dates