How are conditions controlled under glasshouses?
A3. Under glasshouse conditions, the aerial environment along with crop irrigation and nutrition is controlled using computers. This also gives the opportunity to avoid disease infection and to use natural predators to control pests instead of sprays. Increasingly irrigation systems are closed (i.e.: excess gets recycled, while leaves and old plants are composted, rather than being dumped). Cultural systems in Britain are designed to minimise any impact on the environment. Bumblebees are used for pollination and pests are biologically controlled using natural predators rather than chemical sprays.
