| 摘要 |
An economical and easy to erect enclosure for protecting young plants and inducing early maturity. The enclosure comprises a fluid ballasted, bow or hoop supported tunnel of translucent sheet material which encloses a row of the plants. The sheet material is stretched over the bows and where the longitudinal edges of the sheet meet the ground they are formed with continuous pockets or passages that can be filled with fluid ballast such as water to help anchor the sheet in position.
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