Waddell, Eric Wilson
There is an abundance of material dealing with agricultural practices in the tropics, in particular
those described as involving 'shifting cultivation', and Spencer (1966) has recently covered the
Southeast Asian literature. However research is only now beginning to emerge from that
intellectual cul-de-sac in which attention has been focussed almost exclusively on crop and fallow
cycles and interpretations have been influenced by assumptions about their essential immutability
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