Summary
This field survey investigates the physiological characteristics and community composition of weeds in organic and conventional Arabica coffee plantations in Bener Meriah Regency, Aceh province, Indonesia. Using quadrat sampling, the study identifies 12 weed species and finds that organic plantations support greater weed diversity (H' = 1.8) compared to conventional ones (H' = 1.4), with Bidens pilosa L. emerging as the dominant species across both systems. The relatively low Sorensen similarity index (42%) suggests that management regime meaningfully shapes weed community composition, with implications for integrated weed management strategies in smallholder coffee systems.
UK applicability
The findings are specific to tropical highland Arabica coffee agroecosystems in Indonesia and have limited direct applicability to UK farming conditions; however, the methodological comparison of organic versus conventional management effects on weed diversity may offer transferable insights for UK researchers studying weed ecology in horticultural or agroforestry systems.
Key measures
Species density; frequency; dry weight (g); Shannon-Wiener diversity index (H'); Sorensen similarity index (%); number of weed species
Outcomes reported
The study measured weed species diversity, density, frequency, and dry weight in organic and conventional Arabica coffee plantations, calculating Shannon-Wiener diversity indices and Sorensen similarity indices to compare weed communities between the two management systems.
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