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