The sprinkler family of irrigation devices â used for about 15% of farm irrigation â is a bit better than flood irrigation in terms of efficiency, but thatâs not saying much. Bringing up the rear in terms of usage is drip irrigation, which is the method of choice for about 5% of farms.
The ready-to-eat cafeteria foods were also found to be contaminated with Escherichia coli, Staphylococcus aureus and Streptococcus faecalis at similar rates (Table 2). Up to half of the ready-to-eat foods were contaminated with two or more strains of these pathogenic bacteria (data not shown).
Physical contamination of food. Food contamination falls into three main classes of definition, and they are physical contamination, chemical contamination and also biological contamination of food. Physical contamination of food is defined as any foreign objects that falls into our food during the manufacturing or preparation process. During the manufacturing of food, carelessness plays a very important role in the contamination of food. Often we come across packed food with inedible foreign objects in it.