Site Factors Related to Dry Farm Vegetable Productivity and Quality in the Willamette Valley of Oregon

Davis, Matthew; Stone, Alexandra; Gallagher, Andy; Garrett, Amy

doi:10.21273/horttech05287-23

Cited by 2 publications

(5 citation statements)

References 42 publications

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“…For example, grafted 'Big Beef' and 'BHN 871' in 2022 had a relatively high mean BER incidence, ranging from 21% (95% confidence interval, 14%-32%) for 'Big Beef'-'Fortamino' to 30% (95% confidence interval, 20%-42%) for 'BHN 871'-'DRO141TX'. The mean BER incidence for 'BHN 871'-'DRO141TX' was not that different from the mean BER incidence found by Davis et al (2023) for ungrafted dry-farmed 'Early Girl' tomato of 38%. The increased BER incidence in 2022 may have been a result of the effect of the farm because the BER incidence can vary considerably by farm (Davis et al 2023).…”

Section: Discussioncontrasting

confidence: 57%

“…The mean BER incidence for 'BHN 871'-'DRO141TX' was not that different from the mean BER incidence found by Davis et al (2023) for ungrafted dry-farmed 'Early Girl' tomato of 38%. The increased BER incidence in 2022 may have been a result of the effect of the farm because the BER incidence can vary considerably by farm (Davis et al 2023). Although grafting onto certain rootstocks appears to reduce BER, site factors and management practices at a given farm may also contribute to BER incidence.…”

Section: Discussioncontrasting

confidence: 57%

“…Climate change is creating hotter and drier summers in the Willamette Valley of Oregon, which will make dry-farmed tomato production riskier (Davis et al 2023). Grafting has the potential to increase yield and reduce the BER incidence of dry-farmed tomato.…”

Section: Discussionmentioning

confidence: 99%

“…Soil series and soil available water holding capacity were determined following the protocol found in Davis et al (2023). Temperature and relative humidity were monitored using temperature and relative humidity dataloggers (Kestrel Drop D2 Wireless Temperature and Humidity Data Logger; Nielsen-Kellerman Co., Boothwyn, PA, USA) at each trial site, with data logged every 10 min.…”

Section: Methodsmentioning

confidence: 99%

“…Dry-farmed tomato is a popular crop in coastal California, and the cultivar Early Girl is preferred by growers and consumers (Leap et al 2017). However, many tomato cultivars, including Early Girl, are susceptible to the physiological disorder blossomend rot (BER), especially if dry-farmed in hotter, drier climates, as found in the Willamette Valley of Oregon, USA (Davis et al 2023). Additionally, BER can be delineated by degree of severity.…”

mentioning

confidence: 99%

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Grafting onto Tomato Rootstocks Improves Outcomes for Dry-farmed Tomato

Davis,

Stone,

Selman

et al. 2024

hortte

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Vegetable grafting can mitigate the negative effects of drought on crop production. Dry farming, which is the production of crops without irrigation during a dry growing season, can result in lower yields, smaller fruit, and a higher incidence of blossom-end rot (BER), which is a physiological disorder associated with drought stress. To determine the effects of grafting on yield and fruit quality of dry-farmed tomato (Solanum lycopersicum), three years of trials were conducted using different scion–rootstock combinations and ungrafted controls. In 2020, grafting onto rootstocks ‘DRO141TX’ and ‘Fortamino’ resulted in greater total yield and average fruit weight and a lower BER incidence for dry-farmed tomato than grafting onto the rootstock ‘Shincheonggang’ or using ungrafted plants. In 2021, grafting onto the rootstock ‘DRO141TX’ again increased yields and average fruit weight and decreased BER incidence when compared with ungrafted plants (‘Fortamino’ was not tested). Interactions were detected between different scion–rootstock combinations in terms of the degree of reduction of necrotic BER (BER resulting in a large, sunken, grey or black spot, making the fruit unmarketable) when grafted onto ‘DRO141TX’, with the scion ‘Azoychka’ having a 69% reduction in necrotic BER and the scion ‘Astrakhanskie’ having a 93% reduction in necrotic BER. In 2022, an interaction was detected between the rootstocks and scions in terms of their effect on large fruit (>0.33 lb) yield, with ‘BHN 871’ grafted onto ‘Fortamino’ producing the highest yields of large fruit and ‘Big Beef’ grafted onto ‘Fortamino’ producing the lowest yields. Overall, grafting onto the rootstocks ‘DRO141TX’ or ‘Fortamino’ improved diverse dry-farmed tomato outcomes in the Willamette Valley of Oregon, USA.

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Section: Discussioncontrasting

confidence: 57%

Section: Discussioncontrasting

confidence: 57%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Grafting onto Tomato Rootstocks Improves Outcomes for Dry-farmed Tomato

Davis,

Stone,

Selman

et al. 2024

hortte

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Tomato dry farming as an agroecological model for California’s drought resilient future: Farmers’ perspectives and experiences

Socolar,

Carlisle,

Bowles

2024

Elem Sci Anth

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Small, diversified farms on California’s Central Coast have been dry farming for decades, allowing farmers to use water stored in soils from winter rains to grow tomatoes and other vegetables with little-to-no irrigation in summers without rainfall. As recent water shortages in California have forced a reckoning with the precariousness of the state’s water supply, policy groups and the general public have become increasingly interested in dry farming as a promising means of achieving water conservation goals. Academic research on this practice, however, has been scarce. Amid growing urgency to develop low-water agricultural systems in the state, we interviewed 10 Central Coast dry farmers, representing over half of the commercial dry farm operations in the region where this practice was developed, to collaboratively answer 2 central research questions: (1) What business and land stewardship practices characterize successful tomato dry farming on California’s Central Coast? (2) What is the potential for dry farming to expand beyond its current adoption while maintaining its identity as a diversified practice that benefits small-scale operations? We summarize farmers’ wisdom into 9 themes about current dry farm practice, its potential for expansion and future opportunities. We also synthesize farmer-stated environmental constraints on dry farm feasibility into a map of suitable areas in California. As we consider how dry farming might expand to new areas and operations, we highlight dry farming’s history as an agroecological alternative to industrial farming in the region and the need for careful policy planning to maintain that identity. In examining this California Central Coast dry farming system, we ask if and how it can enhance the viability of nonindustrial farming operations as the food system adapts to less water availability. Because policies that encourage dry farm expansion could change economic landscapes in which dry farming operates, we caution that well-intentioned policies could edge small growers out of dry farm markets if not carefully designed. At the same time, we emphasize the opportunity for dry farm tomato systems to model an agroecological transition toward water savings in California.

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Site Factors Related to Dry Farm Vegetable Productivity and Quality in the Willamette Valley of Oregon

Cited by 2 publications

References 42 publications

Grafting onto Tomato Rootstocks Improves Outcomes for Dry-farmed Tomato

Grafting onto Tomato Rootstocks Improves Outcomes for Dry-farmed Tomato

Tomato dry farming as an agroecological model for California’s drought resilient future: Farmers’ perspectives and experiences

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