WEDNESDAY, April 10, 2013 â A common virus affecting 79 million Americans, already known to cause cervical and head and neck cancers, may also be linked to lung cancer, according to preliminary research findings presented at the American Association for Cancer Researchâs annual meeting.
Organic mulch is material that is applied to the surface of garden soil to protect plantings and improve soil structure. Mulch is considered organic if it is made of material that was previously living plant matter. Examples of organic mulch include shredded leaves, compost, and crushed corn cobs.
A couple of organic materials available in your own yard can be regarded as sources of cheap mulch or even free mulch: lawn grass clippings and the leaves you rake up in fall.For optimal use as mulch, however, each should be prepared ahead of time (see below). It's cheaper and easier to cover a large area with black plastic mulch than with the more expensive bark mulches. 2  Like black plastic mulch, poly tarps provide a cheaper and easier alternative to bark mulches for covering large areas. 3  An advantage poly tarps have over black plastic mulch is that they're sturdier.