RESEARCH EXPERIENCES WITH TWO TYPES OF CORN SALAD (VALERIANELLA LOCUSTA L.)
From variety trials with the dark green compact Vit-type it was possible to select varieties that give high production under glass. Profitability of cropping of this smaller plant type can be improved by increasing the plant density. Also seedling propagation in soil blocks favours the commercial possibilities of the glasshouse culture of corn salad. With this method four successive crops can be grown per winter season as compared with only two when the traditional method of direct sowing in the glasshouse is used.