powders of specific particle size, high productivity and versatile applications. By definition, âSpray drying is the transformation of feed from a fluid state into a dried. particulate form by spraying the feed into a hot drying medium.â (Masters, 1991) A spray dryer operates on convection mode.
Sometimes the grounds and maintenance department of a town or county creates mulch from trees that have been cut down and they make it available to the public. To lay a 4-inch-deep spread of bark mulch in a 300-square-foot area, a landscape or garden service will charge $425, which includes the material and labor. You can buy the mulch for $85 and do it yourself, and pocket a 80 percent saving.
I would venture out to say, it depends on your area, and how you view yourself. Here we have day laborers with a mower charging $19.95 a cut. They also low ball mulch jobs and lay 1 yard of mulch when it requires 2 yrd. Also it depends on if you are licensed (as in lic. landscape architect). At the moment we bill between $40-$60.00 depending on the job, which is fair to our customers here, that's right in the middle.