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Themed 15x15 Freeform Crossword - Compiled By kduffield
Date: 20 May 2013
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Across
1. When ammonium compounds in the soil are changed into nitrogen compounds that can be used by plants (13)
4. All the organisms of one species in a habitat (10)
5. These are results that are taken using sensitive instruments that measure in small increments. (7)
7. Type of conditions where denitrification occurs, e.g. in waterlogged soil (9)
8. All the organisms living in a particular area and all the non-living conditions (9)
10. When nitrogen compounds from dead organisms are turned into ammonium compounds by decomposers (14)
Down
1. Nitrifying bacteria that change nitrites into nitrates (11)
2. Equipment used to measure amount of energy in organisms by burning them (11)
3. Type of plants that contain rood nodules for nitrogen fixation (10)
6. Bacteria found in root nodules (9)
9. Productivity that is available to the next trophic level (3)