To maintain a green lawn it is required to be watered every day if possible around 5-6 am before the sun really gets hot. If the lawn is being watered every day but still turning brown then i would suggest buying some fertilizer.
http://www.articlesbase.com/food-and-beverage-articles/keep-apple-slices-from-turning-brown-naturally-1238490.html
sprinkle with lemon juice
To keep them from drying out and turning brown
you don't
cause it gets pooped on
Yes it should. Potatoes turn brown when exposed to air. Covering them with any liquid should keep them from turning brown.
Oxygen. Dip apple slices in lemon juice to keep them from turning brown.
A hypothesis doesn't have to be a correct statement. Just pick a chemical and say this one will or will not keep the fruit from turning brown. Then give a brief statement about why you think this way.
keep it in the frige
will covering peeled potatoes in olive oil keep them from turning brown
The first and foremost thing in keeping a lawn nice is water. If the lawn does not get enough water, it will dry out and turn brown. Keep the lawn trimmed, and make sure it gets plenty of water, especially if it is getting hit directly by the sun with no shade.
Use lemon juice.