Another way to collect a stool sample is to loosely place plastic wrap across the rim of the toilet, under the seat. Then place the stool sample in a clean, sealable container before taking to the laboratory. Plastic wrap can also be used to line the diaper of an infant or toddler who is not yet using the toilet. The stool should be collected into clean, dry plastic jars with screw-cap lids.
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.
Climate-change induced yield effects by crop and management system, % change from yield with 2000 climate to yield with 2050 climate 5. 2. World food prices (US$/metric ton) in 2000 and 2050 and percent. changes for selected crops and livestock products 7. 3. Climate-change effects on crop production, no CO.