Publisher's Synopsis
Excerpt from The Growing and Handling of Head Lettuce in California
Moisture Requirements - Lettuce must have an adequate supply of moisture throughout the growing season. However, an excessive amount of water in the soil is not. Desirable.
Soil Requirements - Lettuce is. Grown successfully on a wide range of soil types from clay loams to sandy loams and muck, but it attains its highest quality on fertile loam soils which contain much organic matter. Where the fall crop is subject to high temperatures during the early part of the growing season, or where it matures during hot weather, the heavier types of soil should be used, as they retain mois ture better and are somewhat cooler. The lighter soils should be used to produce the crop that grows-and matures during the cool season of the year. Heavy clay soils, though difficult to work, will yield excellent crops. All lettuce land should be well drained and properly leveled for irrigation. Land which has been in alfalfa for several years, usually produces large crops of high quality.
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