Why does irrigation tend to diminish soil fertility?
Ans: Irrigation tends to diminish soil fertility because it leaches the nutrients from the soil by the force of gravity.
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A farmer begins to grow lettuces in tanks, running water from fish tanks through the lettuce plants as fertilizer and then returning the water to the fish tanks. This is an example of ____________________.
Fill in the blank(s) with the appropriate word(s).
All ecosystems must have a flow of energy to thrive. What are the three basic categories of these organisms?
a) algae, bacteria, mangroves b) producers, consumers, decomposers c) bacteria, virus, algae d) zooplankton, phytoplankton, fish e) omnivores, carnivores, herbivores
The most dangerous type of skin cancer is ____________________
Fill in the blanks with correct word
"Horst," meaning "nest," is a suitable word for the rock formation it describes because
A) these rock formations are also in ditches or valleys, like nests. B) these rock formations are typically in protected valleys. C) these rock formations are pushed up to a high place, and horsts are nests in high places. D) these rock formations are circular and cupped like nests.