منابع مشابه
Bromoxynil degradation in a Mississippi silt loam soil.
BACKGROUND The objectives of these laboratory experiments were: (1) to assess bromoxynil sorption, mineralization, bound residue formation and extractable residue persistence in a Dundee silt loam collected from 0-2 cm and 2-10 cm depths under continuous conventional tillage and no-tillage; (2) to assess the effects of autoclaving on bromoxynil mineralization and bound residue formation; (3) to...
متن کاملA spatial analysis of phosphorus in the Mississippi river basin.
Phosphorus (P) in rivers in the Mississippi River basin (MRB) contributes to hypoxia in the Gulf of Mexico and impairs local water quality. We analyzed the spatial pattern of P in the MRB to determine the counties with the greatest January to June P riverine yields and the most critical factors related to this P loss. Using a database of P inputs and landscape characteristics from 1997 through ...
متن کاملA Model of Bridge Choice Across the Mississippi River
5 On September 18th 2008, a replacement for the previously collapsed I-35W bridge opened 6 to the public. Consequently, travelers were once again confronted with the opportunity to find 7 better alternatives. The traffic pattern of the Minneapolis road network was likely to read8 just, because of the new link addition. However, questions arise about the possible reasons (or 9 components in the ...
متن کاملSources of nitrate yields in the Mississippi River Basin.
Riverine nitrate N in the Mississippi River leads to hypoxia in the Gulf of Mexico. Several recent modeling studies estimated major N inputs and suggested source areas that could be targeted for conservation programs. We conducted a similar analysis with more recent and extensive data that demonstrates the importance of hydrology in controlling the percentage of net N inputs (NNI) exported by r...
متن کاملThe 1973 Flood and Man's Constriction of the Mississippi River.
The progressive constriction of the Mississippi for navigation since 1837 has caused bottom erosion in some stretches. In others the bottom oscillates up and down with time. The high stages rise much more rapidly. Constriction of the river channel causes flooding and makes floods higher; thus navigation works degrade the protection afforded by levees. The combination of navigation works and lev...
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ژورنال
عنوان ژورنال: Science
سال: 1906
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.23.590.634