O. Diaz

Effects of deep tillage on soil properties, growth and yield of soya in a compacted ustochrept in Santa Cruz, Bolivia

R. Barber, L. R. Barbosa, O. Diaz, 1989 .

Effects of conservation and conventional tillage systems after land clearing on soil properties and crop yield in Santa Cruz, Bolivia

F. Navarro, R. Barber, O. Diaz, 1996 .

Effects of deep tillage and fertilization on the population, growth and yield of soya during an exceptionally wet season on a compacted sandy loam, Santa Cruz, Bolivia

R. Barber, O. Diaz, M. Orellana, 1990 .

Compaction status and compaction susceptibility of alluvial soils in Santa Cruz, Bolivia

R. Barber, O. Diaz, C. Herrera, 1989 .