STUDIES OF THE Lactuca Dracoglosa, MAKINO. : I. Growth and Yield

[摘要] 1. Investigated on the growth and yield of the "Lactuca dracoglosa, MAKINO." 2. Growth of leaf stopped at the 20th leaf from the preliminary one and growth of further leaves is slowly or little. 3. Growth of leaf is greatest in the middle stage of the growth and the early is second and the latest is third. 4. Most adaptive period of transplanting may be at the end of May. 5. Greater space of planting greater yield of leaves but the plot with 72 plants was difficult to the works. 6. Lactuca dracoglosa, MAKINO is most important, particularly in summer season, for green diet of the chicken. 7. Heaviest yield of leaves per 1/100 Tan was 35.7kg, and yielded below the 20 th leaf. (1950, 9. 22)

[学科分类] 农业科学（综合）