Nitrogen cycle
Nitrogen cycle
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AMMONIA
AMMONIFICATION
ATMOSPHERE
DENITRIFICATION
LEGUMES
LIGHTNING
NITRATES
NITRIFICATION
NITRITES
PROTOPLASM
| H | Y | R | K | I | A | L | E | G | U | M | E | S | D | D |
| A | S | C | N | Y | S | H | F | L | B | M | I | Z | E | C |
| C | N | U | W | W | S | E | T | A | R | T | I | N | V | G |
| C | S | I | V | J | L | I | G | H | T | N | I | N | G | C |
| O | D | Q | L | W | N | U | O | J | Y | T | K | H | W | W |
| S | M | S | A | L | P | O | T | O | R | P | I | Z | E | Y |
| N | S | P | T | L | T | X | V | I | K | Q | I | G | M | Q |
| N | O | I | T | A | C | I | F | I | N | O | M | M | A | B |
| U | D | J | X | I | M | I | S | Q | L | S | I | L | P | J |
| N | Q | P | F | X | C | M | Y | E | C | S | X | U | B | Z |
| X | Z | B | F | A | T | M | O | S | P | H | E | R | E | G |
| G | O | W | T | L | F | X | C | N | K | O | P | E | Y | L |
| L | U | I | A | T | C | Y | M | U | I | W | D | N | Y | S |
| F | O | T | R | Y | B | C | S | R | L | A | R | M | G | T |
| N | I | T | R | I | T | E | S | S | N | W | W | O | H | M |
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