Biodegradable Plastic Mulch

We put plastic mulch on our vegetable beds today. The plastic mulch we used is made of corn and is biodegradable. When we say mulch most people think of ground up plastic or something like pine mulch, however what we mean is that we put down a strip of plastic. It is like a giant roll of cellophane that is black and four feet wide. This black plastic is used to keep weeds from growing around the plants while they are small so that we don't have to use herbicides. The plastic also encourages the plants to grow because of the heat that is trapped under the plastic. We ran drip tape underneath the mulch to water the plants. The drip tape is attached to the same water line that waters our cattle and chickens out in the pasture. The drip tape has holes every 8" that let water out. Since the tape is under the plastic it has very little evaporation and uses very little water. We'll use the drip line only when the plants get very dry.