The criterion level, often abbreviated as Lc, is the steady noise level permitted for a full eight-hour work shift. This is 85 dB(A) in most jurisdictions, but it is 90 dB(A) in Quebec and 87 dB(A) for organizations that follow the Canadian federal noise regulations.
Royal Catchfly (Silene regia) This striking plant may grow as high as five feet, with bright red flowers. It flowers from May through September, and can be seen in remnant prairies and open woods. In Missouri, it is known only in the Ozarks.
If you live in the Ozark Plateau area, note that you use ânorthâ planting dates. The higher elevation in that area results in a later spring and earlier fall frosts. Some vegetables may be planted for a fall crop. When a fall crop is possible, a second set of dates is listed under the dates for spring planting. Figure 1USDA plant hardiness zones of Missouri. (Find your plant hardiness zone by ZIP code and see a full-color state map at http://planthardiness.ars.usda.gov/PHZMWeb.) Page: Â« First â¹ Previous Next âº Last Â».