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09/10/2021 8:19 pm
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(a) How do plants obtain food?
(b) Why do plants need nitrogen? How do plants obtain nitrogen?
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09/10/2021 8:20 pm
(a) Plants obtain food by a process called photosynthesis.
(b) Plants need nitrogen to make proteins and other compounds. They take up nitrogen from the soil in the form of inorganic salts called nitrates (or nitrites), or in the form of organic compounds which are produced by bacteria from the atmospheric nitrogen.