No.
Beef.
You simply move the cows to another field by clicking on the brown field and pressing the dollar sign then wait for it to turn green after a while.
The grass turns green when it is exposed to sunlight.
A dull mower blade will "tear" the grass instead of "cut" it. The jagged blades of grass will dry up and cause your lawn to look brownish or even yellowish - much like when cut grass clippings turn from green to brown/yellow as they dry up.
I'm thinking here you have a cow and have turn it out to pasture or want to. Green grass is best. As to the type of grass, for the simple answer. I'm lying, there is no simple answer, depending on what grows best in your area of the world. If i had a field that I was going to plant, I would go with a good mix. I like orchard grass, timothy grass, something that comes out when it is still a little cold maybe, with something that doesn't take too much water, with high protein. Personal preference is what to go with here how do you get to where you want to be. That is what is best.
To begin,grass needs two things to generate chlorophyll,the chemical that gives it its green hue,which are water and sunlight.When grass is depleted of water,it cannot be green,because it needs both water and sunlight to be so.When someone waters grass,it once again has both things it requires to generate chlorophyll,and so will be verdant green once more.
Shoal grass is consumed by various herbivorous marine animals such as sea turtles, manatees, and some species of fish like parrotfish and surgeonfish. Grazing by these organisms helps regulate the growth and health of shoal grass beds in marine ecosystems.
Chlorophyll, a pigment found in the cells of grass, gives it its green color. Chlorophyll absorbs sunlight to help with photosynthesis, the process by which plants make their food.
Grass is always a healthy green when, well, healthy. When dying from lack of water, CO2, etc., it will turn orange, yellow, etc.
Grass doesn't turn into fairies.
They keep the grass down without the farmer having to turn on a tractor and hook up a mower to mow the grass him or herself. While he or she's got cows eating the grass, the farmer can be free to do other things that need to be done. Plus the grass benefits from the grazing cows, enabling the grass to grow more healthier when it is being grazed; the feces and urine from the cows also aid in grass growth. The deposition of manure leaves the farmer one less job to do as well; he/she doesn't need to spread manure that would've otherwise accumulated in the drylot if he/she had to feed the cows in a drylot instead of having them get their on food out on the pasture.
No, they generally both graze on grass. Cows produce whole milk; humans turn it into 2% by removing milkfat down to that level. It's healthier and the milkfat can then be used for other things, like butter.