Strip tillage led sorghum yields and water efficiency in Ethiopian field trial

A randomized complete block field experiment in the semi-arid northern Ethiopian highlands found that strip tillage delivered the highest mean sorghum grain yield among five systems tested, reaching 3,771 kilograms per hectare. It also achieved the highest rainwater use efficiency in the trial, while conventional tillage produced the greatest surface runoff and sediment loss, including a measured sediment loss of 28.2 tonnes per hectare. The results indicate that strip tillage provided the strongest balance between sorghum productivity and the water- and soil-conservation indicators evaluated.

Researchers compared zero tillage, mulch tillage, reduced tillage, strip tillage and conventional tillage on clay loam soil. The study assessed sorghum grain yield and rainwater use efficiency alongside soil physical, chemical and hydrological properties, including soil organic carbon, total nitrogen, moisture retention, surface runoff and sediment loss. Its scope was the experimental field in the semi-arid environment of northern Ethiopia, so the findings concern the tested crop, soils and management systems rather than establishing the same ranking across all agricultural settings.

Strip tillage was the leading treatment in the reported comparison. Its mean grain yield of 3,771 kilograms per hectare exceeded the yields recorded under the other four systems, and it registered the best rainwater use efficiency. These were direct observations from the field experiment, not model projections or forecasts.

Together, the measures suggest that the strip-tillage treatment retained more effective use of rainfall while maintaining the experiment’s highest mean crop output, addressing two central constraints identified for farming in the region: water scarcity and soil degradation. The other systems showed distinct strengths and weaknesses. Mulch tillage was most effective at increasing soil organic carbon and total nitrogen and at retaining soil moisture, making it the strongest treatment for those particular indicators.

Zero tillage reduced sediment loss but generated the highest surface runoff, and that combination hindered crop performance. The comparison therefore did not show that minimizing soil disturbance was uniformly advantageous: under the experimental conditions, zero tillage limited sediment movement but did not minimize every pathway of water loss. Conventional tillage performed least well on the linked conservation measures.

It recorded both the highest runoff and the greatest sediment loss, with sediment reaching 28.2 tonnes per hectare. Overall, the findings identify strip tillage as the best measured compromise among the five options and mulch tillage as the leader for soil organic carbon, total nitrogen and moisture retention. They support targeted tillage management as a potential route to greater smallholder agricultural resilience in Tigray, while remaining specific to the conditions and indicators evaluated in the field trial.

Subject of Research: Field comparison of five tillage systems for sorghum yield, soil properties and water conservation in northern Ethiopia.

Article Title: Different tillage systems impact crop productivity and soil conservation parameters in the northern Ethiopian highlands

Article References: Kebede, M., Brhane, N., Haile, G. G., & Hagazi, N. (2026). Different tillage systems impact crop productivity and soil conservation parameters in the northern Ethiopian highlands. Discover Sustainability. https://doi.org/10.1007/s43621-026-04804-3

Image Credits: AI Generated

DOI: 10.1007/s43621-026-04804-3

Keywords: strip tillage, sorghum yield, rainwater use efficiency, soil conservation, soil erosion, surface runoff, mulch tillage, zero tillage, Ethiopian highlands, Tigray, Different, tillage