Earthworms: Unsung Heroes of Uganda's Sustainable Agriculture

Sustainable agriculture aims to produce food while protecting the environment, communities, and animal welfare. However, the heavy reliance on chemical pesticides and fertilizers, while boosting yields, has degraded soil efficiency and reduced biodiversity.

Agricultural scientists highlight the indispensable role of earthworms in reversing this trend. These creatures are natural “ecosystem engineers” that significantly improve soil health and fertility, making them key players in sustainable farming systems.

Research conducted at Makerere University Agricultural Research Institute (MUARIK) Kabanyolo, focusing on various crops like bananas, soybeans, coffee, and maize, revealed that earthworm populations thrive in banana and fallow fields. These fields showed a higher concentration of organic carbon and nitrogen, correlating with better soil management and increased earthworm abundance.

According to Associate Professor Jaswinder Singh, earthworms convert organic waste into nutrient-rich castings (vermicast). Their activity stimulates microbial activity, aggregates soil, improves water retention, and aids in the decomposition of organic matter. “Earthworms stimulate microbial activity, mix and aggregate the soil, soil water content and water holding capacity,” Singh explains.

Their burrowing also enhances soil porosity, improving water infiltration, reducing erosion, and creating pathways for root growth, especially in compacted soils. Some studies suggest earthworms even release beneficial metabolites like vitamins B and D into the soil, further promoting plant growth.

In Uganda, earthworms are essential for boosting soil fertility, improving soil structure, and promoting low-cost farming. They break down crop residues into nutrient-rich castings, reducing the need for expensive inorganic fertilizers. Their tunnels improve aeration and water infiltration, helping crops withstand drought.

Furthermore, earthworms recycle organic waste, turning it into valuable fertilizer for organic farming. This improved soil health leads to increased crop yields and resilience. Encouraging earthworm populations through practices like reduced tillage and organic waste application is vital for Uganda’s long-term food security. Scientists are also exploring earthworms as a protein source for animal feed.

Source: monitor.co.ug