Question

1). Soil is...........part of our life
2).Soil contain_,_and countlesd_organisms
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Answer 1

Answer:

1 essential

2 minerals., nutrients microscopic organisms

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Answer 2

Only 5% of what is produced by green plants is consumed by animals, but the 95% is consumed by microorganisms. One gram of fertile soil can contain up to one billion bacteria. There are many different types of bacteria, and most of them have not even been discovered yet! Most of these bacteria are aerobic, meaing that they require oxygen from the soil atmosphere. However, other bacteria need to live without oxygen, and other types can live both with, and without oxygen. The growth of these bacteria is limited by the food that is available in the soil.

Soil fungi are also large component of the soil that come in various sizes, shapes, and colors. Mushrooms have underground roots (mycelium) that absorbs nutrients and water until they are ready to flower in the mushroom form. They tolerate acidity, which makes them very important to decompose materials in very acidic forests, that microbes cannot do, they can also decompose lignin, which is the woody tissues for decomposing plants.

SOIL ANIMALS

Soil animals are consumers and decomposers because they feed on organic matter and decomposition occurs in the digestive tract. Some animals feed on roots, and others feed on each other. There are several types of worms. Earthworms are the easiest to identify. They eat plant material and organic matter, and excrete worm castings in the soil as food for other organisms. They also leave channels that they burrow in, which increases infiltration. Earthworms can weigh between 100-1,000 pounds per acre! There are also microscopic worms called nematodes, or roundworms. These worms live in the water around soil particles. There are several different types of nematodes, some of them eat dead materials, others eat living roots, and some eat other living organisms. Some nematodes are bad, and can cause