Linear regression analyses on soil quality parameters over time revealed few significanttrends. Provincially, only bulk density and STP concentration showed significant trends between1998 and 2006, which was likely reflective of site management that includes reduced tillage andthe increased use of forages in rotation. Between 1998 and 2006, provincial bulk density appearsto have decreased and STP concentrations appear to have increased. The lack of significanttrends elsewhere in the provincial dataset suggests that soil quality has stayed relatively constantfrom 1998 to 2006 for the majority of parameters measured. At the ecoregion level, regionaltrends over time were identified, although these appear to be confined mostly to the morenortherly regions of the province. For example, significant regression coefficients were morecommon in ecoregions with cooler, wetter climates (i.e., Boreal Transition and Peace Lowland).
đang được dịch, vui lòng đợi..
