(i) Plantations are managed by large multinational companies because plantation crops are grown on large farms which are modern, scientific and self-contained units. Only one crop is grown on a large-scale. Enormous capital investment is required to set up a plantation and a large number of labourers are employed. Hence, only multinational companies can manage such large scale plantations.
(ii) Crops are not rotated in shifting agriculture because the people who practice shifting agriculture have become habitual of consuming specific crops. Hence, when the fertility of the current field is lost, they shift to another field instead of changing their crops.
(iii) In extensive agriculture, yield per hectare is low but total yield is large because it is practised in areas with large land holdings, using less labour and less chemical fertilizers and pesticides.