nitrogen fixing plants Flashcards

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1
Q

how do you replace lost nitrates in the soil

A

by growing a legume crop
e.g. clover or beans

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2
Q

legume plants have … bacteria

A

nitrogen-fixing

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3
Q

nitrogen-fixing bacteria convert ..

A

nitrogen gas in the air into ammonium ions

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4
Q

what do plants use to make proteins

A

ammonium ions

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5
Q

when the crop is ploughed in

A

the bacteria is decomposed - ammonium is released into the soil

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6
Q

the ammonium is converted to … by the nitrifying bacteria

A

nitrates

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7
Q

the nitrates made are available to

A

next years crops

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