has been proven to reduce Lolium infestations dramatically, clear evidence of the value of new weed-control tools in prolonging the life of herbicides.
When ryegrass pastures were converted to wheat production in Australia, ryegrass (Lolium) became the main weed.
Australian farmers have developed and adopted several “harvest weed seed control” (HWSC) systems that effectively target annual ryegrass and other weed seeds during the harvest operation. The use of HWSC in addition to herbicidal weed control now has been proven to reduce Lolium infestations dramatically.
Annual Ryegrass (Lolium rigidum), courtesy of Macleay Grass Man (http://freeimagefinder.com/detail/7370410186.html).
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Planning Committee for a National Summit on Strategies to Manage Herbicide-Resistant Weeds, Board on Agriculture and Natural Resources, Division on Earth and Life Studies, National Research Council "
The Australian Experience of Managing Herbicide Resistance and Its Contrasts with the United States--Michael Walsh ."
National Summit on Strategies to Manage Herbicide-Resistant Weeds: Proceedings of a Symposium . Washington, DC: The National Academies Press,
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As of 2013, the National Science Education Standards have been replaced by the Next Generation Science Standards (NGSS), available as a print book, free PDF download, and online with our OpenBook platform.
The NGSS offer a detailed description of the key scientific ideas and practices that all students should learn by the time they graduate from high school. The standards are based largely on the 2011 National Research Council report A Framework for K-12 Science Education: Practices, Crosscutting Concepts, and Core Ideas.