“…Intensification is a complex term that implies a number of specific agricultural strategies designed to raise production per unit of land (Allen, 2004;Boserup, 1965Boserup, , 1981Brookfield, 1972Brookfield, , 1984Brookfield, , 2001Guillet, 1987;Johnston, 2003;Kirch, 2006), although in this paper I expand the term somewhat to include strategies that require additional labor to produce additional food, even when that involves increasing the area of land under cultivation. In this section, I consider two types of agricultural intensification that can be employed to manage subsistence risk: overproduction and irrigation.…”