GREENHOUSE Russian patent published in 1995 - IPC

FIELD: agriculture. SUBSTANCE: this greenhouse includes multi-stage narrow-rack hydroponic devices having nutrient solution supply trays 1, optical radiation sources 3 and 21 and soil cell 5 motion limiter 7. Each tray 1 is provided with cylindrical vegetation rack 4 holding soil cells 5 in its external housing 9 and cylindrical knife 14 for cutting above-surface leaves 15 of plants 6, for example, salad. Soil cell 5 motion limiter 7 has perforations which are coaxial relative to soil cells 5, have close intimate contact with latter and allow fixing them in desired position. Vegetation rack 4 is positioned under tray 1 for revolution about its axis and provided with inner guides 18 along which knife 14 executes reciprocating motion. EFFECT: more sophisticated design. 6 cl, 3 dwg