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