1.   But close examination showed that species intolerant of acid conditions or high nitrogen levels were not reappearing.

2.   And with higher nitrogen levels, you can recover faster from any workout.

3.   A legume, the clover helps to build up the nitrogen level in the soil, greatly enriching it.

4.   After the bottles are boxed, a test is done on a sample bottle to check the salt content, the nitrogen level and the color.

5.   But no matter how deep the seals dive, nitrogen levels in their blood rise little.

6.   However, if nitrogen level never fell, the property could never be developed.

7.   However, if nitrogen levels never fall, the property will never be developed.

8.   Moreover, he said, the nitrogen level is so high that it is probably toxic to the grass.

9.   Nitrogen levels declined in only a quarter of the lakes, and remained level in the rest.

10.   Runoff from developed properties has increased nitrogen levels in the lake, triggering algae growth.