... temperature warmer (1014 C) than the surrounding land and air (Wirrmann 1992). This radiation of warmth ...
... (Vacher et al. 1992). Although its cool, dry climate prevents cultivation of Andean species such as chili ...
... de Candolle (1884), the Russian agronomist N. I. Vavilov (1992) proposed that the place where a crop ...
... . Vavilov (1992), following Cook (1925), proposed that the Andean region of South America was one of the ...
... ; Pearsall 1992) (Fig. 3.27). Chenopodium quinoa grains have been found in two Archaic sites in the western ...