Conservation agriculture practices to boost soil biodiversity and crop productivity

Overview

This research program delivers practical, science-backed conservation agriculture practices designed to improve soil health, biodiversity, and crop productivity for smallholder farmers. By integrating no-till farming, legume-based crop rotations, vermicomposting, and both dead and live mulches (such as Brachiaria and silverleaf), the approach enhances soil biological and nutritional quality while supporting beneficial ecosystem services. A key finding is that certain macro-arthropods, including spiders, beetles, and earthworms, thrive under these practices and contribute to natural pest and weed control, reducing the need for chemical inputs.

Technical specifications

Core practices evaluated:

• No-till farming to preserve soil structure and organic matter
• Legume-based crop rotations to enrich soil nitrogen and break pest cycles
• Vermicomposting to improve soil biological activity and nutrient cycling
• Live and dead mulches (e.g., Brachiaria, silverleaf) to suppress weeds and conserve moisture

Key biological findings:

• Beneficial beetles, spiders, and earthworms show increased diversity and abundance under these cultural practices
• Enhanced macro-invertebrate activity is associated with measurable increases in crop yields
• Certain spider families and beetle species demonstrate efficacy against insect pests and weeds, with potential for conservation and mass rearing

Validation approach:

• Fully replicated randomized complete block design field experiments comparing conventional tillage with conservation agriculture treatments
• Macro-invertebrates sampled and identified to family and species level
• Statistical analysis of treatment effects on abundance, diversity, and crop yield
• Planned laboratory studies on foraging behaviors of spiders and beetles against specific pests and weeds
• Testing of native earthworm groups for plant waste degradation and field release potential

Technology readiness level

The field-based research has been validated through replicated experiments demonstrating positive effects of no-till, mulching, and crop rotation on macro-invertebrate diversity and crop yield. The next phase requires laboratory validation to identify specific spider and beetle species with the strongest pest and weed control potential, assess native earthworm capabilities for waste degradation, and explore mass rearing and release strategies. The program is at an advanced research stage, transitioning from field validation toward applied biological control solutions. A 12-month partnership is sought to support laboratory activities, including reagents, personnel, arthropod gut content analysis, and nutrient conversion efficiency testing.