Midterm 2, Q5

Spencer,
In the part of the answer re. nutrient retention you did not mention differences in clay among the 3 soils, but based your very brief explanation of differences in CEC just on organic matter. And, those differences in organic matter contents among the 3 soils needed to be explained (you just stated what they are). The explanation should have included statements that both organic matter & clay particles cary lots of charges on their surfaces and are consequently responsible for nutrient retention.
Parts of answer on water retention & drainage were much better (ie complete). But the final selection of the most suitable location (or soil) was not correct. The best soil was #2 since it had the most balanced combination of nutrient and water retention properties for the city park.

So, here is an important advice to all of you who are reading this (and I sincerely hope that you are reading this) - in these so-called explanation type of questions, pls make sure that you provide both the reason for your observation and explanation.