Environmental Studies Seminar Series | Lightning Talks by ENVS Faculty

In person and via Zoom ( Meeting ID : 978 5545 8946, Passcode : 454736) . If you are unable to stream the talk live and need to access a recorded version, please contact Stacy Philpott at [email protected] . A UC Santa Cruz email address is required to access the recording. Host: Natalia Ocampo-Peñuela Speaker #1: Hannah Waterhouse Title: Building Cover Cropping Communities of Practice on California’s Central Coast Abstract: California’s agricultural communities face the dual challenges of increasingly variable and limited irrigation water supplies, alongside persistent groundwater quality degradation from nitrate leaching that has imperiled drinking water for nearly one million residents of rural communities in the state. These challenges come together most acutely in California’s Central Coast region, the “Salad Bowl” of the U.S., where intensive, high-value vegetable and berry production dominates. The benefits provided by adding winter cover crops to these annual cropping systems are considered essential to improving groundwater quality, but perceptions among farmers and policymakers that cover crops consume too much water make a formidable barrier to adoption in this Mediterranean climate. Indeed, less than 5% of cropland on the Central Coast is cover cropped, with the majority left fallow over the winter season to devastating effects including erosion and loss of fertility, pollution of surface and groundwater, and flooded fields which can delay agronomic operations. In this research we address the question of how farmers in Mediterranean, semi-arid climatic regions can implement cover cropping in a water scarce environment while meeting water quality regulatory goals. Through both controlled trials and on-farm, participatory research, we aim to determine how different cover crop management practices affect the balance between water regulation and provisioning and water quality protection, as well as the supply of nitrogen (N) for cash crops. We have formed a

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