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Cover crops (CC) provide numerous soil, crop, and environmental benefits. However, the benefits of CC on increasing the subsequent crop yield remain unclear and debatable. Here, we comprehensively summarized the existing literature on the (a) various agronomic and pedoclimatic variables which impact the CC performance, (b) explored the potential mechanisms through which CC influence the main crop yield, and (c) and highlighted the directions for future research to ensure a better fit of CC into agricultural systems. Results of our review suggest that CC induced effects on the next crop yield are largely dependent on the CC species, duration of CC growing season, regional climatic differences, and the main crop type. Overall, the holistic knowledge generated will contribute to advance CC adoption by the researchers, policy makers, and extension personnel.
- 1 Introduction
- 2 Cover crop factors affecting yields: species, biomassaccumulation and length of use
- 3 Case studies 1 and 2: intercropping and long-termuse of cover crops
- 4 Crop management factors affecting yields: crop typeand tillage
- 5 Soil and climatic conditions modulating cover cropeffects on yields
- 6 Case study 3: cover crops as a fallow replacement
- 7 Potential mechanisms in cover crop effects on yields:soil conditions and water availability
- 8 Potential mechanisms in cover crop effects on yields:weed, disease and pest management
- 9 Case study 4: incorporating cover crops in organicsweet potato systems using surface residues andincorporation
- 10 Case study 5: on-farm research and adaptation ofcover crop management
- 11 Future research trends
- 12 Conclusion
- 13 Where to look for further information
- 14 References