Table 4. Spearman rank correlations of length of the last fallow period and the number of cycles with other site characteristics (n = 25). Variable Spearman rank rs Landscape context Fallow length Number of Cycles Percentage of milpa perimeter with mature forest 0.510** -0.622** Amount of mature forest in 500 m radius 0.391* -0.581** Spared trees (all spp.) Density -0.055 ns -0.048 ns Minimum dbh of spared trees -0.024 ns 0.042 ns Maximum dbh of spared trees 0.804*** -0.779*** Mean dbh of spared trees 0.772*** -0.693*** Density of vegetation Percentage of plots with vegetation cover >90% -0.542** 0.420* Substrate Rockiness 0.444* -0.409* *P <0.05, **P <0.01, ***P <0.001, ns = not significant