White hoary-pea

White hoary-pea (lat. Tephrosia candida) is a perennial shrub belonging to the Fabaceae family. This crop is widely recognized in tropical and subtropical agriculture as a high-performance green manure, known for its ability to produce significant biomass even in nutrient-poor soils.

Originating from tropical Asia, the plant has spread across various tropical regions in Africa and Latin America. It is commonly cultivated as a cover crop within plantations of tea, coffee, and rubber, serving as an effective tool for preventing soil erosion and improving general soil structure.

Botanically, it is a fast-growing woody shrub that can reach heights of up to 2–3 meters. The leaves are pinnate and feature fine hairs on the underside, which provides the distinctive "white" appearance. It produces racemes of white or creamy flowers followed by flat, elongated pods containing seeds.

The crop thrives in warm climates and requires ample sunshine and well-drained soil. It is notably tolerant of acidic soil conditions, which makes it a preferred choice for reclamation of degraded lands. Cultivation typically involves pre-sowing seed scarification to break dormancy and ensure uniform germination.

The primary economic value of white hoary-pea lies in its role in soil fertility management. Through symbiosis with rhizobia bacteria, the plant fixes atmospheric nitrogen, significantly enriching the soil profile. Furthermore, it is extensively used as a mulch to suppress weed growth and retain soil moisture.

• Rapid accumulation of biomass.
• Effective atmospheric nitrogen fixation.
• Protection against topsoil erosion.
• Tolerance to low-fertility and acidic soils.
• Ease of maintenance through regular pruning.