Aim: The sensible
use of chemical products.
||New methods and materials are constantly
being developed by the chemical industry. Every product is provided with a handbook or
instructions giving details of how it should be used, and the safety-precautions that need
to be taken.
Unfortunately this information is all too frequently ignored or forgotten.
in I1 fertilisers, if correctly used, give major benefits in crop yield without harmful
effects. Over-use can, however, cause harm to the environment by contaminating waterways
and ground water. Chemical agents need to be measured carefully, and diluted suitably,
according to the need; indiscriminate use can contaminate the environment, e.g. waterways,
harming or killing animal and bird life. (In illustration I7, sewage-waste from animal
husbandry is used as a soil fertiliser. Excessive use contaminates waterways, depleting
oxygen levels and killing the fish population).