what is the black soil along the Nile River
http://library.thinkquest.org/16645/the_land/nile_river.shtml
Indians puke.
Since this is not my area of expertise, I searched Google under the key words "Nile 'black soil'" to get these possible sources:
http://www.answers.com/topic/upper-and-lower-egypt
http://encarta.msn.com/encyclopedia_461511156/Ancient_Egypt.html
http://www.prntrkmt.org/geography/nile.html
(Broken Link Removed)
http://www.k12.hi.us/~kapunaha/student_projects/unwrap/nileriver.htm
However, looking for just "black soil" I found:
http://en.wikipedia.org/wiki/Black_soil
http://www.indiaagronet.com/indiaagronet/soil_management/CONTENTS/Management%20of%20black.htm
http://columbia.thefreedictionary.com/Black+Soil
Although these latter sources are from different areas, the makeup of the soils might be similar.
I hope this helps a little more. Thanks for asking.