Multiple choice

Which of the following help/helps in aerating the soils?

  1. Micro fauna
  2. Meso fauna
  3. Macro fauna

  1. Only 2

  2. Only 1 and 2

  3. 1, 2 and 3

  4. Only 2 and 3
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A Correct answer
Explanation

Soil organisms are the creatures that spend all or part of their lives in the soil. There are several criteria that can be used to classify soil organisms. For example, soil organisms are classified according to their size into: (1) macro-organisms (> 2 mm in width), (2) meso-organisms (0.2 to 2 mm in width), and (3) micro-organisms (< 0.2 mm in width) Arthropods belong to the meso group. They are a diverse group of spiders, mites, pseudo-scorpions and insects. Many arthropods prey on disease causing pests. Others help to shape soil structure and thus, can improve root development, water infiltration, drainage and help in aerating the soil.

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