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