This paper presents the results of feldwork at Risco de los Indios, an archaeological site situated at 2.400 m elevation in the upper Diamante River watershed. The site contains twenty nine stacked-rock residential structures and dates to ca. 500 cal BP. Recovered faunal and macrobotanical remains indicate the site focused mainly on hunting camelids, underwritten by exploitation of local plants as well as transport and consumption of domestic beans (Phaseolus vulgaris). Extralocal ceramics and obsidian sourcing indicates substantial mobility and contact with other groups within and across the southern Andes. These results are discussed in the context of the other high-altitude residential sites in the southern Mendoza region.

Se presentan los resultados de los trabajos de campo en el sitio arqueológico Risco de los Indios, localizado en la cuenca alta del río Diamante a unos 2.400 m s.n.m. El sitio reúne un total de veintinueve estructuras habitacionales pircadas y fue fechado en ca. 500 años AP. Las características generales de Risco de los Indios sugieren que es un sitio de caza, con una fuerte dependencia en el consumo de camélidos, complementado con la explotación de plantas domésticas (Phaseolus vulgaris) y silvestres. Algunos de los tipos cerámicos recuperados en el lugar, al igual que los instrumentos de obsidiana y la mayor parte de las especies de plantas y animales identificadas, muestran una importante circulación de bienes. Los resultados presentados son discutidos en el contexto del resto de los sitios arqueológicos de altura del sur de Mendoza.

São relatados os resultados de um ensaio instalado em "terra de cerrado", na Estação Experimental Central de Campinas, para o estudo dos efeitos do calcário e de adubos fosfatados, aplicados isoladamente e em combinação, na produção de forragem de soja perene. A adubação fosfatada e a calagem provocaram grandes aumentos na produção, e os efeitos residuais foram observados durante os sete anos em que durou o ensaio. A calagem elevou consideràvelmente o índice pH, ao mesmo tempo que reduziu o teor de A1+ + + trocável do solo.

In this paper are discussed the effects of the use of liming and phosphate fertilizers which were applied independently or in combination with each other. The experiment was installed in a poor type of soil known as "Cerrado". Liming and phosphate fertilizers increased the production of forage of "Soja perene" (Glycine javanica L.). The chemical soil analysis showed an increase in thepH value, whereas the phosphates utilized did not increase the phosphorus content of soil. With the exception of natural phosphates the effect of phosphorous fertilizers was better than that of liming.