Do you know how nitrogen moves around the Earth?
Nitrogen Cycle Quiz
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Drag and drop to match the gas to the correct proportion of the current atmosphere of Earth
- Other gases
How do most plants get their nitrogen?CorrectIncorrect
Why do plants need nitrogen?CorrectIncorrect
Which organisms maintain the nitrogen levels in the soil?CorrectIncorrect
What natural source of nitrogen is sometimes added to fields by farmers?CorrectIncorrect
Permeable, Soluble, Potable
Finish the sentence: Nitrogen compounds found in artificial fertilisers are and dissolve in the soil’s water.
In some areas where there are poor soils (not enough nitrogen) carnivorous plants have adapted to get their nitrogen from which source?CorrectIncorrect
What are nitrogen-fixing bacteria?CorrectIncorrect
Which of the following plants have a mutualistic relationship with nitrogen-fixing bacteria?CorrectIncorrect
What do we call the process by which farmers change the crops they grow each year to maintain nitrogen in the soil?CorrectIncorrect
How does nitrogen in plants get into the soil?CorrectIncorrect
Nitrogen is often found in a particular form in the soil what is this form?CorrectIncorrect
Is the following statement accurate? Lightning can cause atmospheric nitrogen to be released into the rain and be washed into the soil?CorrectIncorrect
Is the following statement accurate: nitrogen be can be moved back and forth from the atmosphere and into the soil by bacteria.CorrectIncorrect
Where are nitrogen-fixing bacteria found in plants known as legumes?CorrectIncorrect
What is the Nitrogen Cycle?
Why do Plants Need Nitrates?
Plants need nitrates to make the compounds that are found in proteins and in the four bases of DNA – adenine, thymine, cytosine and guanine. Proteins are made from amino acids which all contain nitrogen. Nitrogen is therefore a key ingredient in plants as well as animals, this explains why we use artificial fertilisers to add nitrogen to the soil as well as natural fertilisers such as seaweed and manure.
Crop Rotation and Nitrogen in Soil
Farmers often practice a technique called crop rotation which aims to maintain a natural balance of nitrates as well as other important materials such as phosphorus. The acronym NPK is often used to explain which nutrients are most essential for plants as well as animals to grow and be healthy. Potassium is another, although less critical nutrient that has the chemical symbol K.
Crop rotation typically involved planting a series of crops that require different amounts of nutrients, one harvest after another. Legumes or leguminous plants such as peas and beans can be included in this sequence to replenish the soil nitrates that are consumed by plants and then removed when they are harvested. Legumes are a special kind of plant that has a mutualistic relationship with nitrogen-fixing bacteria. These bacteria are able to take atmospheric nitrogen from the air and convert it into soluble forms that can be used by future crops. Take our Nitrogen Cycle Quiz to test your knowledge on this topic!