the wisdom of crowds, an innovative theory described in social science, claims that the aggregate decisions made by a group will often be better than those of its individual members if the four fundamental criteria of this theory are satisfied. this theory used for in clustering problems. previous researches showed that this theory can significantly increase the stability and performance of lea...

Context Agricultural intensification leads to land use changes with potential consequences for soil aggregate stability and size distribution, affecting nutrient water retention capacity, aeration, sequestration of organic carbon, biogeochemical cycling. Aims This study evaluated distribution under potato, fallow Eucalyptus globulus L. uses in Cambisols the eastern branch Central Andes, Bolivia...

In sustainable agricultural systems, recycling of nutrients is a major component of nutrient management. We conducted an experiment in Abakaliki South Eastern Nigeria in 2007 to investigate the effects of organic amendments (poultry droppings (PD), burnt rice husk dust, (BRHD), Unburnt rice husk dust (UBRHD) and inorganic fertilizer (NPK) on soil properties and their residual effect tested in 2...

This study aims to evaluate the pavement performance of permeable asphalt concrete (PAC) produced with modified recycled coarse aggregate (RCA) based on six types single modification methods and three double methods. Firstly, water absorption, apparent density, crushing value RCA before after were tested. Subsequently, PAC these was investigated, including optimum asphalt-aggregate ratio, stabi...

reported resistance values of 2,8 to 3,2 MPa for tillage pans in A long term trial to study the sustainability of a vertisol under continuous spgarcane monocropping was commenced in 1939 at the Experiment Station of the South African Sugar Association. The design of the trial consists of four replications of two main plots, each split into four sub-plots. The treatments comprise various combina...