Cover or greenhouse for growing beetroot plants is made of transparent material formed into arched vault with funnel-shaped regions leading to hollow pillars conducting rainwater down into ground

摘要

Rainwater (10) falling on the transparent square roof panels (3,8) runs into funnel-shaped regions (9,9'). The lower ends (11) of the funnel-shaped regions have drainage openings (12). They are plugged into the top ends (15) of hollow vertical columns (14). The lower ends (17) of the columns have holes (18) to allow the rainwater to flow into the ground (7). The roots (6) of the beetroot plants (5) extend between the columns, and the leaves of each plant occupy the arched spaces (1) between the columns.