ASHS Press Releases

American Society for Horticultural Science

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ASHS Press Releases
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Soil NO3 testing can improve nutrient use efficiency of spinach crops

To provide California's spinach growers with new management strategies for nitrogen fertilizer and irrigation practices, researchers performed experiments in the Salinas and San Juan Valleys of California. They determined that, to mitigate environmentally negative nitrogen losses, the nitrogen use efficiency (NUE) can be increased by the use of soil testing at two critical points: at-planting and before the first midseason fertilizer application.

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Comparison of 55 years of data emphasizes need for breeding heat-tolerant vegetables

A study determined the relationship between long-term weather and yield of 11 horticultural crops and one field crop in Wisconsin. The number of hot days during the growing season was determined to be the most important factor among the weather conditions examined. Results revealed the importance of the amount and frequency of seasonal precipitation, showed the negative effects of extreme temperatures on vegetable crop yields, and emphasized the importance of breeding vegetables for heat tolerance.

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Open flame torches shown to be cost-effective, non-fatal to crops

Researchers evaluated damage and recovery responses of four cranberry varieties to handheld propane flame cultivation torches used for spot weed control. They found that the flame cultivation technique caused less damage to cranberry plants than incidental exposure to glyphosate during spot treatment of weeds. The results indicated that flame cultivation could be successfully integrated into weed control for cranberry crops in certain situations, including organic farming.

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Rocky Mountain juniper’s oil content and composition vary with seasons, tree gender

Scientists evaluated Rocky Mountain juniper trees for changes in year-round essential oil content and composition. They found that the concentration of essential oil in fresh leaves varied, and that oil content in the male tree was greater than that of the female tree at most sampling points, thus demonstrating that both content and composition of essential oil from Rocky Mountain juniper are subject to seasonal changes and also depend on the sex of the tree.

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Study of food safety certification informs Vermont fresh produce industry

A report on the economic costs of good agricultural practices (GAPs) audits of small and medium-size farms in Vermont provides information to farmers who are considering GAPs certification. The study also provides background data to agricultural service providers and policymakers planning for the future of the fresh produce industry.

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