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California farmers who use reduced-disturbance tillage and winter cover cropping can boost production and improve soil health. However, some farmers are hesitant to try these conservation practices due to uncertainty about whether planting winter cover crops will deplete soil moisture in already drought-stricken regions. Our study addresses these concerns by looking at how long-term reduced-disturbance tillage and winter cover cropping, compared to fallowed soils with standard tillage, affected soil moisture. Although we found a statistical difference in total soil water content, the difference was only about 0.3 inches of water per foot of soil. On average, the soil water content of the top 0–96 inches was highest for the reduced-disturbance fields with winter cover crops. This was especially evident during our driest field season, from November 1, 2017, to March 15, 2018, when cumulative rainfall was only 1.9 inches. Our findings show that winter cover cropping and reduced-disturbance tillage can improve soil without depleting soil water levels in row crops.

Despite a widely agreed necessity for agroecological transition, there are various substantial constraints that hinder the adoption of alternative, more sustainable, practices. We employ the niche management concept to examine the initial phases of transition in the local wine-growing niche in Israel, or specifically, the replacement of herbicides with the use of cover-crops combined with the practice of mowing of herbaceous growth using specialized trimming machines. Our goal is to uncover the triggers, drivers and agents of change in farming practices within the agroecological system in which it happened, despite entrenched, widely recognized risk perceptions among farmers. The problem-oriented research design revolved around a transdiciplinary team that included ecologists and social scientists. We identified three groups of frontrunners who initiated, developed and sustained the adoption of the more sustainable agricultural practices. The two-year study focused on interviewing vineyard farmers who were transitioning to cover crops, and this qualitative research was paralleled with continuous ecological monitoring. The farmers believed that the risks inherent in the new practice, if any, were preventable and manageable. The transdisciplinary research design, which integrated farmers into the social and ecological research process, further assisted in facilitating a transition by creating a forum for stimulating communication between diverse stakeholders during the transition, increasing trust between actors from the various sectors and identifying key issues of concern (e.g., risk and associated costs) to better align the motives of farmers, wine-makers, and ecologists. The research design may have also contributed to the adoption of a more holistic view of the agroecological system by various stakeholders and the belief that one cultivation method clearly benefits the system, particularly in the long-term. We therefore conclude with key-insights on the role of the research itself in agroecological transition processes. [ABSTRACT FROM AUTHOR]