Even where labor and land is cheap, hot steam is needed to sterilize arable land. In September 2010 a big Dutch flower grower started to use its steam generator in its Kenyan green houses.
Steam is mainly used to sterilize volcanic substrate so the material can be reused several times. The substrate gets steamed in steam boxes which are equipped with a vacuum steaming system. Vacuum steaming systems are highly energy efficient. The steam generator was manufactured by MSD Corp., Durbach.
