A Systematic Review of Soil Health Restoration Pathways and Ecosystem Functionality in Bhutan’s Mountain Agro-ecosystems

Yenten Namgay *

National Centre for Organic Agriculture, Department of Agriculture, Ministry of Agriculture and Livestock, Bhutan.

Passang Wangmo

National Centre for Organic Agriculture, Department of Agriculture, Ministry of Agriculture and Livestock, Bhutan.

Tshetrim La

National Centre for Organic Agriculture, Department of Agriculture, Ministry of Agriculture and Livestock, Bhutan.

Tshering Tobgay

National Centre for Organic Agriculture, Department of Agriculture, Ministry of Agriculture and Livestock, Bhutan.

Kinzang Dorji

National Centre for Organic Agriculture, Department of Agriculture, Ministry of Agriculture and Livestock, Bhutan.

*Author to whom correspondence should be addressed.


Abstract

This systematic narrative review evaluated soil health restoration pathways in Bhutan using evidence synthesized from peer-reviewed literature, national datasets, and technical reports. The review examined interventions across five domains: soil regeneration, nutrient cycling, crop diversification, hydrological resilience, and ecological pest regulation within farming systems characterized by steep slopes, fragmented landholdings, and annual soil losses ranging from 3–21 t ha⁻¹. Findings showed that integrated soil and nutrient restoration practices comprising organic amendments, residue retention, reduced tillage, and diversified cropping systems substantially improved soil quality and ecosystem stability. Regenerative management increased soil organic carbon by approximately 17%, with sequestration rates ranging from 0.2–1.5 Mg C ha⁻¹ yr⁻¹ depending on management intensity and site conditions. Organically managed systems recorded higher total nitrogen (0.38%) and cation exchange capacity (22.26) compared to conventional systems (0.26% and 19.45, respectively). Between 2005 and 2023, sustainable land management initiatives established 1,347.42 ha of terracing, 2,097.02 ha of contour hedgerows, 355.17 ha of stone bunding, and 3,333.48 ha of landslide stabilization plantations, significantly contributing to erosion control and landscape restoration. However, labour shortages, limited mechanization, and weak market integration continue to constrain widespread adoption of regenerative practices in Bhutan.

Keywords: Soil health restoration, mountain agro-ecosystem, sustainable land management, integrated nutrient management, hydrological resilience


How to Cite

Namgay, Yenten, Passang Wangmo, Tshetrim La, Tshering Tobgay, and Kinzang Dorji. 2026. “A Systematic Review of Soil Health Restoration Pathways and Ecosystem Functionality in Bhutan’s Mountain Agro-Ecosystems”. International Journal of Plant & Soil Science 38 (5):320-31. https://doi.org/10.9734/ijpss/2026/v38i56084.

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