How do organic fertilizers affect the long-term sustainability of farming?

• A. They provide a quick solution to nutrient deficiency
• B. They encourage healthy soil ecosystems
• C. They can lead to soil contamination
• D. They require high input of synthetic chemicals

Answer: (B)

Organic fertilizers play a vital role in enhancing the long-term sustainability of farming primarily by encouraging healthy soil ecosystems. The use of organic fertilizers, such as compost, manure, and green manure, enriches the soil with organic matter, which improves its structure and water retention capacity. This boost in soil quality enhances the biological activity within the soil, fostering diverse microbial communities that are crucial for nutrient cycling and overall soil health.

Healthy soil ecosystems support the growth of crops by providing a balanced and sustained supply of nutrients. They also enhance the soil's resilience to erosion, improve its ability to sequester carbon, and promote biodiversity both above and below ground. As a result, organic fertilizers contribute not only to growing healthy plants but also to the long-term productivity and sustainability of agricultural systems.

In contrast to this, the other options do not support the long-term sustainability of farming. Quick solutions to nutrient deficiencies may lead to unsustainable farming practices, while potential soil contamination and reliance on synthetic chemicals can harm ecosystems and degrade soil health over time.