Read the passage below carefully:
In Yobe State, traditional harvesting of gum arabic from wild Acacia senegal trees frequently resulted in low-grade resin due to crude tapping cuts and unhygienic open-air drying. To resolve these quality issues, local agricultural cooperatives introduced specialized tapping tools alongside regulated shade-drying protocols. As a result, tree bark damage was minimized and the overall purity of the harvested resin improved significantly. These qualitative enhancements enabled organized farmer groups to bypass market intermediaries and export directly to foreign food-processing firms, ultimately increasing rural household incomes.
Based on the passage above, arrange the following synthesized summary statements in the correct logical sequence to form a cohesive summary of the development:
- 1Traditional, unrefined harvesting practices in Yobe State yielded low-grade gum arabic resin.
- 2Agricultural cooperatives introduced modern tapping tools and structured shade-drying protocols.
- 3The adoption of improved techniques reduced tree damage and elevated resin purity.
- 4Enhanced resin quality enabled direct foreign exportation, boosting rural household earnings.