Eric Justes – författare

This collection features four peer-reviewed reviews on intercropping.The first chapter summarises data from over 50 field experiments undertaken since 2001 on cereal–grain legume intercropping using spring and winter cereal–grain legume intercrops. The chapter addresses the effects of intercropping on yields and quality, the agronomical performance of intercropping and cultivation practices in intercropping.The second chapter reviews the existing evidence on systems productivity, resource capture and use efficiency, between intercrops and sole crops for maize–legume-dominated cropping systems. The chapter also considers intercropping under different conditions, including those with heightened or reduced levels of moisture and nitrogen.The third chapter considers the effects of crop rotation and intercropping management practices on soil health, focussing on their impact on crop productivity, soil health enhancement and stability. The chapter also highlights the importance of leguminous crops and soil organic matter in maintaining healthy soils, sustaining crop productivity and enhancing biodiversity.The final chapter provides an overview of the economic and ecological benefits, challenges and major considerations of implementing alley cropping systems within North America. A case study detailing the performance evaluation of a pecan-cotton alley cropping system is also included.

This study, based on a literature review and simulations, shows the efficiency of cover crops at catching nitrate in most agriculture situations. It also analyzes both the negative impacts they can have and the ecosystem services they can provide. The introduction of a cover crop between two main crops helps catch the soil mineral nitrogen before the period of drainage and consequently reduces nitrate leaching and nitrate concentration in the drainage water. This study allows quantifying the efficiency of cover crops at catching nitrate and optimizing their implantation conditions over a large range of French pedoclimatic conditions. The presence of high nitrate levels in surface and ground waters, due to excessive nitrogen fertilization and natural production of nitrate by soil organic matter mineralization, is a double challenge for public health and environment protection.