nitrogen fixing plants Flashcards
1
Q
how do you replace lost nitrates in the soil
A
by growing a legume crop
e.g. clover or beans
2
Q
legume plants have … bacteria
A
nitrogen-fixing
3
Q
nitrogen-fixing bacteria convert ..
A
nitrogen gas in the air into ammonium ions
4
Q
what do plants use to make proteins
A
ammonium ions
5
Q
when the crop is ploughed in
A
the bacteria is decomposed - ammonium is released into the soil
6
Q
the ammonium is converted to … by the nitrifying bacteria
A
nitrates
7
Q
the nitrates made are available to
A
next years crops
