answer:
because it benefits the soil. the long alfalfa stand life also gives the soil a chance to rest from frequent field crop rotations, helps provide nitrogen for subsequent crops, and improves soil tilth. this helps prevent pesticide and sediment movement to natural waterways.
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Answer:
The answer is if the niches of two organisms were moved to the other ecosystem they would compete with one another for the same food and other resources in the environment. Eventually, one species would be likely to outcompete and replace the other.
This is easy. you move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be on the exponet of 10. If the decimal is being moved to the right, the exponet will be negative. If the decimal is being moved to the left, the exponet will be positive.
In this case you are moving to the left so it's positive.
The answer will be ' 1.43 × 10^9 '