по Steve Bloom 14 лет назад
288
Больше похоже на это
I predict that the compacted forest soil will hold the most soil when run through with water.
I plan to use this information to raise awareness of how off road vehicles dusturb our natural wildlife habitats.
site for the effect of soil compaction on erosion
http://books.google.ca/books?hl=en&lr=&id=OSsuAAAAYAAJ&oi=fnd&pg=PA1&dq=the+effect+of+soil+compaction+on+erosion&ots=WJsiOvhjQx&sig=lrZH75GGktqgeCAjwxM7pD60VDc#v=onepage&q=the%20effect%20of%20soil%20compaction%20on%20erosion&f=false
http://eusoils.jrc.ec.europa.eu/library/themes/compaction/
soil compaction grasslands
http://www.google.ca/search?sourceid=navclient&ie=UTF-8&rlz=1T4ACAW_enCA414CA415&q=soil+compaction+grasslands
I have chosen to test the results of compressing two different types of soil (forest, grassland) for Science Fair.
soil erosion, piano, soccer, reading, and lego.