@Weedygarden Something I use often... Sieves or Gold Sieves. They are made to fit the top of a std 5 gallon bucket. The screens coming in multiple sizes. You can get metal screen or preformed plastic screens. The plastic ones are cheap.
Even though I haven't been gold prospecting in years I still use my sieves several times a year. I sort seed, clean chaff from seed... Heck I've even sorted freshly shelled peas with them, get the bad ones out. The bad peas are usually smaller and will drop through the proper size sieve.
They are really good for cleaning roots, put the roots and dirt in a sieve, sit it on a bucket then use a water hose to wash them. Perfect for out side, stuff you don't want to bring in the house. You can stack several sieves of different sizes on one bucket for sorting material into different sizes. The list of things they can be used for is endless...
http://www.keeneeng.com/mm5/merchant.mvc?Screen=CTGY&Category_Code=SV
Keen Engineering is a reputable company... been around since the 50's. I've done business with them several times.
Largest supplier Gold Pans, Prospecting Equipment and Metal Detectors These folks are in colorado... a prospecting store, never done business with them.
Edited to add... Long drive early tomorrow. I'm taking dad to his hearing aid doctor... 3hrs one way... I dread this...