Evaluación de clones de Populus spp., a los dos a？os de edad, en dos micrositios de la región pampeana, Argentina

poplar production in the pampean region of the province of buenos aires could become an altenative and/or complementary activity, because of the ecological conditions for its cultivation. it is within this context that is important to know the behaviour of the clones in the different environments, in order to define which ones could present more stability in the different sites. the aim of this work was to study the interaction between the growth and the survival parameters of 16 clones of populus spp., in two geomorphologycal different micro-sites, in the pampean region of argentina. the studied clones were planted in two different essays, one for each geomorphic situation: hill and lowland. a statistic analysis was done in order to compare the essays in an individual and in a combined way. each essay was installed with a randomized block design. the analyzed variables by the end of the second year of growth were survival, mean height and basal area. for the evaluated region, the interaction between clones and micro sites was significant for height and survival. the mayor water availability in the lowland micro-site produced mayor clone growth, with significant differences with the hill micro-site. the stability of survival and growth in the micro-sites is one of the principal objects in a clone plantation. being the microsite a huge environmental reality, as a non controllable variable, the reduction of variability in the response, will allow the construction of more homogeneous management units.