ASHS Press Releases

American Society for Horticultural Science

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ASHS Press Releases
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Mixture of blue and red lights recommended to enhance lettuce quality, yield

Scientists determined the effects of blue and red LED ratios on leaf shape, plant growth, and the accumulation of antioxidant phenolic compounds of a red leaf lettuce and a green leaf lettuce cultivar. They determined that red LED light promoted growth and that blue LED light was good for phenolics accumulation rather than growth, thus concluding that a combination of red and blue light is essential for cultivation of leafy vegetables like lettuce.

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Scientists in western Washington use crop enterprise budgets to evaluate production practices

Researchers used crop enterprise budgets to provide baseline information and contrast the economic potential of growing lettuce and tomato under high tunnel and open-field production systems. Results showed it was 43% more profitable to grow lettuce in the open field than in the high tunnel, while growing tomato in high tunnels was three times more profitable than open-field production.

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Virus-resistant hybrid features high yields, disease-resistant attributes

Researchers have introduced 'CaroTex-312', a new high-yielding, orange-fruited, Habanero-type, F1 hybrid pepper. The yield attributes of 'CaroTex-312', particularly its potential for producing high early yields, should be especially appealing to growers trying to widen their marketing window. The report also suggested that the new cultivar has several potentially useful disease-resistance attributes.

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Study results may help predict plant responses to light, temperature

Researchers monitored environmental data inside shadehouses with full covering of red, blue, pearl, and black nets in central Florida over 12 months. The report documents the different environmental modifications inside the structures, which will help predict or interpret specific plant responses, including photosynthetically active radiation and air temperatures.

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Study of crop and soil nitrogen dynamics results in valuable recommendations for growers

Scientists monitored fertilization and irrigation management practices in 26 fall-planted annual strawberry fields in California. Controlled-release fertilizer rate trials indicated that routine use of high CRF rates was not an efficient practice; the researchers suggested that reducing CRF rates, particularly in heavier textured soils that are less easily leached, could substantially improve nitrogen use efficiency. The report includes several other recommendations for improving nitrogen management in annual strawberry production systems.

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