effect of climate change on soil fertility and productivity
The potential variations in the properties of agricul-. tural soils are less well known. Diaz et al. (1994) have. reported that under a climate change scenario the soil. organic matter content and erosion rate would de-. crease with regard to current values in the Arrecifes. River basin.
change, and (2) climate change conditions derived from regional climate parameters projected by the. GISS general circulation model combined with a CO2 concentration of 550 ppm. The 1971 to 1995. period was simulated under neutral conditions with the purpose of defining soil conditions for 1996. It. was found that in the event of a change in climate, physical proporties would change to a lesser degree. than chemical properties. The soil bulk density would decrease by 8% with respect to the baseline sce-. nario in soils under nsk of erosion.
Effects of rising temperatures. Increased soil respiration â Rising temperature increases the rate of chemical and biochemical reactions. For soil microbes and roots, that also means increasing respiration, which can release more carbon dioxide and even methane from soils.