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- klass ditches
production. The rich, dark soil is quite productive, and a system of drainage ditches was established early ...
roadsides and ditches? How many of us wish that there was something that could be done about it? Residents ...
ditches through wind dispersal. Since 2005, we have been investigating the risk potential for exposure ... agricultural streams (or ditches) that have not been exposed to Bt crops, and then introduce Bt and non-Bt corn ...