Posted by Eldon (WA) on January 29, 2015 at 21:35:14 from (98.247.110.251):
In Reply to: Roundup and cookies? posted by Ralphwd45 on January 29, 2015 at 17:32:00:
Most herbicides are considered low or moderately toxic. All chemicals have a half-life in the environment. Half-life is defined as the amount of time it takes to biodegrade one half of the original amount. Herbicides are broken down by sunlight and microbial activity in the soil.
All chemicals are assigned Lethal Dose (LD 50) numerical values through certain testing procedures. What LD 50 means is the dose or amount of a pesticide which can kill 50% of the test animals when eaten or absorbed through the skin. LD50 is expressed in milligrams of chemical per kilogram of body weight of the test animal (mg/kg). The lower the LD50 the more acutely toxic the chemical.
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Today's Featured Article - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
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