Are white grubs in compost pile beneficial?
Yes, grubs are actually good for the compost pile, helping to break things down and aerate it. Generally, they will go away on their own, so. I wouldn't use any chemicals in the compost to get rid of them. Once you put the compost put in the garden, birds will most likely feast on any that are left and you could also hand pick the ones you see and drop them in a bucket of soapy water. If you happen to have chickens, they enjoy snacking on them too.
Not if they are Vine weevils! Personally I wouldn't take a chance. If they are they could cause a whole host of problems for you. Identify what they are first before you use the compost...or not.
I am conducting research. It is a comparative research comparing the performance of two different macro-decomposer. One of the parameters is that of color. Can I use it as determinant of compost quality?
Actually, yes. The finished compost should have a pleasant odor and a nice dark brown to black color.
I have a rotating tumbler, about five feet long, opens from the side and has a one inch pipe with one eight holes in it running from end to end in the middle and material covers the pipe. Is the material getting enough air or do I need to drill more holes in the tumbler? Is it possible to get more heat in the winter months? Thank you.
A two inch pipe with 1cm holes every inch is recommended. If you can increase the diameter of the holes, your composting p rocess might speed up. If not, the process will still occur. Don't let your compost dry out, it needs to be moist, not wet. To make compost hotter, adding manure is the quick fix.
I have heavy clay and have dug up about 6 in so far.
Many gardeners would say you could never add enough! Seriously, it depends on what you are trying to grow. 6" of loose soil full of compost will grow great annuals and azaleas (in a shady area). Root crops of carrots and potatoes will do best in 12" ammended soil. Native trees to your area would do just fine in the clay. Sorry to not be more specific, but again, it depends on the 'crop'.
I use Cedariffic kitty litter (pure cedar) and I compost the used litter. How long do I have to wait before I can use it to mulch, etc? I have a huge pile out back (7 cats) and I want to make sure I don't burn any plants. It's been 6 months. I haven't amended it at all. Should I?
I think I would wait a year to begin using this compost as mulch. It is recommended to not use this compost on vegetable gardens.
I have my vegetable garden spot dug up but not rototilled. I plan to have a truck deliver some compost. How much should I have delivered, and should I add anything else at that time? My garden is about 12 feet by 40 feet. It's a new garden spot.
I would have my soil tested to see what I needed to add. This is done by your local agricultural extension service. Depending on your soil type, a layer 4-12" of compost could be worked into the area. The depth of compost layer would depend on your soil, compost composition and what "quality" you want your soil to have.
Apparently, recycled paper towels have metal in them and should not be used in the microwave. That has led me to the next obvious question: are they still all right for compost? You have an article about newspapers in compost, but not other paper (junk mail, for instance, or shredded office paper or paper towels.
Hopefully these articles will help: http://www.compostinstructions.com/composting-info-paper-towels-are-they-compostable/