Ambio 22: 417-426. soil organic matter and acid soils predominate. case in many of the soils inthe warm-humid tropics. of agricultural and charcoal production. cut and burned to allow planting of crops. cycles before the land has to revert back to fallow. and added to soil.
It's important for adults 40 and older to have eye exams every 2 to 4 years to check for problems. Those who have a history of eye problems or who are at risk for developing them should see an eye doctor every year. This is particularly important if you have risk factors or a family history of eye problems.
On this page: Eye exam cost â¢ When to have your eyes examined â¢ What to bring to your eye exam. Common questions about eye exams include: How much does an eye exam cost? How frequently should I have my eyes examined? What should I bring with me to my exam? These guidelines can help you prepare for your next (or first) eye exam. The first step in preparing for an eye exam is finding a doctor near you.