Follow either the English or the Espanol link below to take our survey on current macrotunnel stormwater practices. Please take the survey only once.

Siga el enlace en inglés o español a continuación para realizar nuestra encuesta sobre las prácticas actuales de macrotunnel para aguas pluviales. Por favor, tome la encuesta una sola vez. 


The Ventura County Resource Conservation District, in partnership with University of California Cooperative Extension and University of California, Riverside researchers, is studying how management practices on macrotunnel operations (plastic covered agricultural hoophouses) affect stormwater runoff quality. The project focuses on developing macrotunnel stormwater management practices, with raspberry as a model crop. Raspberries, strawberries, and cut flowers are typically grown in these structures and the technique is rapidly expanding to other high-value crops. This effort will evaluate the extent to which management practices commonly used for soil conservation and pollution prevention in open-field crops help macrotunnel growers reduce their environmental impacts.

Treatments are: 1) wood chip mulch layer, 3 inch-depth, single commercial source, approximately ¾ inch diameter, C:N between 20:1-30:1 (NRCS Practice Code 484); 2) anionic polyacrylamide (PAM) mixed to a final concentration of 10 ppm, or 7 lbs./acre (NRCS Practice Code 450); 3) barley, cover crop seeded at 400 lbs./acre and maintained at 10 inch height by mowing (NRCS Practice Code 340); 4) weed barrier, single layer, standard weight, applied according to manufacturer recommendations; and 5) bare, weed-free soil, following grower standard post-row practice.

Practices will be assessed for pollution reduction, ease of use, and cost benefits. Additional benefits, including soil moisture retention and pest suppression, will be assessed on a practice-specific basis.

Funding for this research project was provided by the California Department of Food and Agriculture (CDFA) Specialty Crop Block Grant (SCBG) program.

Click HERE to register for the June 13, 8 am-noon, education event at the UC Hansen Agricultural Center. Lunch and translation services will be provided. The event is FREE! The event agenda can be downloaded HERE.