Why is subsistence agriculture still practised in certain parts of the country? Give three reasons

.Why is subsistence agriculture still practised in certain parts of the country? Give three reasons.
A. Reasons due to which subsistence agriculture stillpractised are
(i) Plots of land are fragmented and small, so, not . commercially viable.
(ii) High population pressure on land makes this * compulsory.
(iii) It is the primitive subsistence farming practised by certain tribal communities because they do not have the resources to go in for investment in better inputs like fertilizers, irrigation etc.