Answer:
For most crops the saturation point will be reached at about 1,000–1,300 ppm under ideal circumstances. A lower level (800–1,000 ppm) is recommended for raising seedlings (tomatoes, cucumbers and peppers) as well as for lettuce production
Explanation:
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There aren't enough oxygen molecules in the air are higher altitudes
loblolly pine trees
Explanation:
Population density refers to the amount of organisms living in a particular area:
Population density = 
Area of the forest = 10acres
Population densities of:
White-tailed deer = 
= 0.8white tailed deer/acres
Coyotes =
= 0.7coyotes/acres
Armadillos =
= 4.5armadillos/acres
loblolly pine =
= 23.1loblolly pine trees/acre
The population with the highest density is that of the loblolly pine trees with 23.1 of the trees in an acre.
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