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Bulletin No. 386 - Production Of Lettuce Seed As Affected By Soil Moisture And Fertility, Leslie R. Hawthorn, Leonard H. Polland
Bulletin No. 386 - Production Of Lettuce Seed As Affected By Soil Moisture And Fertility, Leslie R. Hawthorn, Leonard H. Polland
UAES Bulletins
Much of the lettuce seed produced in the United States is grown under irrigation in various western states. Few studies have been made to determine the extent to which yields of seed are influenced by soil moisture and other cultural conditions. Crops have been irrigated mostly on the basis of local practices and the general experience of the grower. Recent studies in Utah (Hawthorn 1951) showed rather conclusively that carrot and onion seed crops grown side by side under the same climatic conditions differ widely in their response to soil moisture. High seed yields were obtained from carrots grown under …