Question

According to Darwin, one acre of land may contain
(a) About 100000 earthworms
(b) About 50,000 earthworms
(c) About 20,000 earthworms
(d) None of the above

Answer 1

Biodiversity is responsible for the provision of many ecosystem services; human well-being is based on these services, and consequently on biodiversity. In soil, it speaks to the biggest part of the creature biomass and is ordinarily named 'biological system engineers'. It involved in all aspects of land management, including conservation, agriculture, mining or other industries,

Complete step by step answer:
Darwin in his mature age got back to earthworms and wrote a book that portrayed the volume of soil that earthworms swallow and launch as castings. He revealed that a section of land may contain around 50,000 earthworms and yield 18 tons of castings every year.

Additional information: Earthworm movement encourages the physical comminution of organic particles, the improvement of soil pH, the upgrade of microbial action, and the mixing of soil from various strata in the profile. They promote the formation of organometal complexes and, by delivering fecal casts at the surface, they bring organo-mineral crumbs from the deeper parts of the profile to the surface. Earthworms likewise encourage the vehicle of specific components to the soil surface so their fecal projects have convergences of calcium, sodium, potassium, magnesium, accessible phosphorus, and molybdenum that are higher than in the surrounding soil. Hence, earthworms not only improve the soil texture but also enrich the soil.
So the correct answer is, ‘(b) About 50,000 earthworms’.

Note: Darwin suggested that earthworms may change the chemical composition of materials that pass through their gut. In any case, there is still little proof that they can quicken the adjustment of parent materials or the breakdown of bigger soil particles.