MODEL RELEASED A worker tending lettuce seedlings in a hydroponic culture greenhouse. Hydroponics is the cultivation of plants without soil. Instead,the roots of the plant are immersed in a trough through which nutrient-rich water trickles. Hydroponics was first proposed in the 1860s,but reached commercial scales in the 1930s,particularly in America | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Seitz, Blair |
Taille de l’image : | 4939 px × 3310 px |
Model Release : | Disponible |
Property Release : | Non requis |
Restrictions : |
|