The total porosity (PT) is dependent on the composition of size, bulk density values or the degree of compaction. The total porosity of the horizon treated is small to medium values (42-44%), with high values crossings in lower horizons (48-55%). Agricultural practice shows that, indeed, production capacity and therefore yields may increase, by certain measures, such as: improved use of machinery and high-tech tools; use of fertilizers, amendments and fighting substances; by performing works of irrigation, drainage, drainage, embankment, prevention and erosion control; by improving labor and human knowledge; by applying the results of scientific research, etc. The soil as a means of production in agriculture, have certain features that distinguish it from other inputs. Thus, the soil is a natural means of production, which are formed and evolve the land area, while under the influence of environmental conditions. Values horizon bioaccumulative high porosity (48-50%) is due to mobilization during repeated interventions agroculturale soil. In depth, porosity values decrease significantly closer to the values determined in the soil profile open the onset of experimental activities. The total porosity higher register the changes in the arable layer, as a result of improvements of the soil structure, the rate of increase from 40.74% to 51.68% (10.94% difference was not significant compared to the control).

total porosity, agricultural practice, production capacity

Presentation: oral