The function of soil micro-organisms include the following except

Soil micro-organisms play an important role in the soil ecosystem. They have several functions that contribute to the health and fertility of the soil. However, there is one function that soil micro-organisms do not perform.

One of the functions of soil micro-organisms is the decomposition of dead plant and animal remains. When plants and animals die, their bodies break down into smaller organic matter, and micro-organisms help in this decomposition process. They break down the complex organic compounds into simpler forms, releasing nutrients back into the soil.

Another function of soil micro-organisms is the recycling of nutrients. They help in the process of nutrient cycling by decomposing organic matter and releasing essential nutrients like nitrogen, phosphorus, and potassium back into the soil. These nutrients can then be taken up by plants and used for their growth and development.

Soil micro-organisms can also cause plant or animal diseases. Some micro-organisms are pathogenic and can infect plants or animals, leading to diseases. This can have a negative impact on agricultural crops and livestock, affecting their productivity and health.

Additionally, some soil micro-organisms live as parasites on crop plants. These micro-organisms derive their nutrition from the plants and can harm their growth and overall health. They can cause diseases or weaken the plants, making them more susceptible to other stresses like pests or drought.

However, the function of soil micro-organisms that they do not perform is the filtration of soil water for plant use. While soil micro-organisms can help in improving the soil structure and water-holding capacity, they do not directly filter the soil water for plant use. Instead, the water moves through the soil and is taken up by plant roots through a process called transpiration.

In conclusion, the correct answer to the question is Option E: filtration of soil water for plant use. Soil micro-organisms do not perform this function directly. Instead, they play important roles in decomposition, nutrient recycling, causing diseases, and living as parasites on crop plants.