1. Mycorrhizal activity increases the phosphorus concentration available in the rhizosphere . 2. The larvae are aquatic and live their entire lives in the rhizosphere . 3. A healthy rhizosphere contains some 7 million microorganisms per hectare. 4. Soil which is not part of the rhizosphere is known as bulk soil. 5. Microbial populations are typically higher in the rhizosphere than in adjacent bulk soil. 6. It is able to withstand high temperatures and high acidity in its rhizosphere . 7. Protozoa and nematodes that graze on bacteria are also more abundant in the rhizosphere . 8. The extent of arbuscular mycorrhizal colonization and species affects the bacterial population in the rhizosphere . 9. In the rhizosphere , plants may suffer from wounds by soil pathogens or other sources. 10. These bacteria are common in the bulk soil and increase in numbers in the rhizosphere .
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