Crop plants grown in monoculture are:
(a) low in yield
(b) free from intraspecific competition
(c) characterised by poor root system
(d) highly prone to pests
(d) Monoculture involves the exclusive cultivation of a single crop over wide areas. It is an efficient way to use certain kinds of soils but the crop plants grown in monoculture are highly prone to pests and thus, it carries the risk of an entire crop being destroyed with the appearance of a single pest species or disease.