Seed Coating, Precision Planting, and Sprinkler Irrigation for Optimum Stand Establishment1

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Abstract
The legal prohibition of the short handled hoe in California has forced a change in the conventional practice of surplus‐seedling and subsequent thinning to achieve optimum stands with lettuce (Lactuca sativa L.) and sugar beet crops (Beta vulgaris L.). Precision placement of coated seed was evaluated as an alternate method of stand establishment with five crops grown on Meloland sandy clay loam with sprinkler irrigation. Germination was compared to emergence of coated seed. Emergence was: carrot (Daucus carota L.) 86%, onion (Allium cepa L.) 85%, and sugar beet 71%. Single lettuce seeds 38 cm apart had 89% stand, paired seeds 2.5 cm apart on 38 cm intervals and thinned had 97%.

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