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<p>Potato (<i>Solanum tuberosum</i>) is a vital crop for food security and livelihoods in Bhutan, yet its productivity has declined, with a national average yield (11.8 t ha⁻¹) severely lagging behind regional and global benchmarks. This study employed a mixed-methods approach to quantify the yield gap for two popular varieties, Desiree and Yusi Maap, and identify key influencing factors. Significant yield gaps of 41% and 52% were found, respectively. The Classification and Regression Tree (CART) model identified seed source as the primary driver; using certified seeds boosted yields to 20.7 t ha⁻¹ compared to 12.3 t ha⁻¹ with self-saved seeds. Other critical factors included soil type, access to agricultural services, and weed management, where weeding twice increased yields by 50%. The findings underscore the need for improved seed systems, targeted agronomic training, and enhanced input access to close yield gaps and promote the sustainable intensification of potato farming in Bhutan. </p>

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Quantifying Yield Gaps and Agronomic Drivers of Potato Productivity in Bhutan

  • 期刊论文

  • 发表日期：

    2026年4月22日

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  • Passang Wangmo,
  • Yadunath Bajgai,
  • Yenten Namgay,
  • Tshering Tobgay,
  • Kailash Pradhan,
  • Lobzang Lobzang,
  • Sangay Sangay

摘要

Potato (Solanum tuberosum) is a vital crop for food security and livelihoods in Bhutan, yet its productivity has declined, with a national average yield (11.8 t ha⁻¹) severely lagging behind regional and global benchmarks. This study employed a mixed-methods approach to quantify the yield gap for two popular varieties, Desiree and Yusi Maap, and identify key influencing factors. Significant yield gaps of 41% and 52% were found, respectively. The Classification and Regression Tree (CART) model identified seed source as the primary driver; using certified seeds boosted yields to 20.7 t ha⁻¹ compared to 12.3 t ha⁻¹ with self-saved seeds. Other critical factors included soil type, access to agricultural services, and weed management, where weeding twice increased yields by 50%. The findings underscore the need for improved seed systems, targeted agronomic training, and enhanced input access to close yield gaps and promote the sustainable intensification of potato farming in Bhutan.