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Central Chile has a Mediterranean climate with a mean annual precipitation of 695mm, 80% concentrated in winter. In this context, water erosion and inappropriate agricultural management along hillslopes are the major causes of soil degradation. From 2007 to 2010, different agricultural systems were compared: conservation tillage with stubble retained: no tillage (Nt), Nt+subsoiling (Nt+Sb), Nt+barrier...
A field study was conducted in Puerto Rico to evaluate the impact of compost on soil quality and crop production in an ultisol. In particular, the effect of compost on the quality of soil organic mater (SOM) was investigated. Compost quantities of 0, 37, 74 and 148 Mg ha -1 were applied annually for 3 years to four different plots and a high single dose of compost was applied (444 Mg...
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