Natural levels of nitrate in Minnesota groundwater are usually quite low (less than 1 milligram per liter [mg/L] of nitrate-nitrogen). However, where sources of nitrate such as fertilizers, animal wastes, or human sewage are concentrated near the ground surface, nitrate may seep down and contaminate the groundwater. Elevated nitrate levels in groundwater are often caused by run-off from barnyards or feedlots, excessive use of fertilizers, or septic systems.
Wells most vulnerable to nitrate contamination include shallow wells, dug wells with casing which is not watertight, and wells with damaged, leaking casing or fittings.
Nitrate contamination of a well is often regarded as a first sign of deteriorating groundwater quality.
Answer:
The Light Reactions occur in the grana and the Dark Reactions take place in the stroma of the chloroplasts
Explanation:
Explanation:
rocky crust
that is why it is called a gas giant
<span>The answer is Hemispheric lateralization. It </span>distinguishes between alpha activity in the left and right sides of a brain and is used to determine how an ad is affecting the mental processes of the individual viewing it. It is t<span>he distinction between functions of the right and left </span>hemispheres<span> of the brain. If one </span>hemisphere<span> is more heavily involved in a specific function, it is often referred to as being dominant.</span>
