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How Crop Load Density Affects Apple Juice, Hard Cider Quality

Hard cider, an alcoholic beverage produced from fermented apple juice or apple juice concentrate, is gaining popularity among consumers. Domestic cider consumption increased more than 850% in the last 5 years in the US, with more than 550 cider producers in the country. The authors of a study in HortScience say that more information about how orchard management decisions impact cider quality can help orchard managers improve cider they produce from culinary apples.


Cornell University's Gregory Peck, the study's corresponding author, along with scientists Megan McGuire, Thomas Boudreau IV, and Amanda Stewart from Virginia Polytechnic Institute and State University, carried out field experiments to assess the impact of three different crop load densities on apple fruit and cider quality. Treatments were conducted in a 14-year-old 'York Imperial'/'M.9' orchard in Winchester, Virginia. Peck explained that 'York' apples are primarily used for processing into products such as juice, vinegar, and applesauce. "The vast majority of cider produced in the United States is made from apple cultivars that were originally planted for fresh or processing markets," he said, noting that culinary apples lack some of the fruit quality characteristics favored by cider producers.

For the experiments, 'York' apple trees were hand-thinned to low (two apples per cm2 branch cross-sectional area, or BCSA), medium (four apples per BCSA), and high (six apples per BCSA) crop loads.

At harvest, total polyphenol content did not differ in juice made from fruit grown in the three treatments. After fermentation, however, the medium crop load had 27% and the high crop load had 37% greater total polyphenol content than the low crop load.

Yeast assimilable nitrogen (YAN) concentration in juice made from fruit from the low crop load treatment was 18% and 22% greater than the medium and high crop load, respectively. YAN concentrations in juice from the medium and high crop load treatments were similar.

 

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Why Your Food Future Could be Trapped in a Seed Morgue

Video: Why Your Food Future Could be Trapped in a Seed Morgue

In a world of PowerPoint overload, Rex Bernardo stands out. No bullet points. No charts. No jargon. Just stories and photographs. At this year’s National Association for Plant Breeding conference on the Big Island of Hawaii, he stood before a room of peers — all experts in the science of seeds — and did something radical: he showed them images. He told them stories. And he asked them to remember not what they saw, but how they felt.

Bernardo, recipient of the 2025 Lifetime Achievement Award, has spent his career searching for the genetic treasures tucked inside what plant breeders call exotic germplasm — ancient, often wild genetic lines that hold secrets to resilience, taste, and traits we've forgotten to value.

But Bernardo didn’t always think this way.

“I worked in private industry for nearly a decade,” he recalls. “I remember one breeder saying, ‘We’re making new hybrids, but they’re basically the same genetics.’ That stuck with me. Where is the new diversity going to come from?”

For Bernardo, part of the answer lies in the world’s gene banks — vast vaults of seed samples collected from every corner of the globe. Yet, he says, many of these vaults have quietly become “seed morgues.” “Something goes in, but it never comes out,” he explains. “We need to start treating these collections like living investments, not museums of dead potential.”

That potential — and the barriers to unlocking it — are deeply personal for Bernardo. He’s wrestled with international policies that prevent access to valuable lines (like North Korean corn) and with the slow, painstaking science of transferring useful traits from wild relatives into elite lines that farmers can actually grow. Sometimes it works. Sometimes it doesn’t. But he’s convinced that success starts not in the lab, but in the way we communicate.

“The fact sheet model isn’t cutting it anymore,” he says. “We hand out a paper about a new variety and think that’s enough. But stories? Plants you can see and touch? That’s what stays with people.”

Bernardo practices what he preaches. At the University of Minnesota, he helped launch a student-led breeding program that’s working to adapt leafy African vegetables for the Twin Cities’ African diaspora. The goal? Culturally relevant crops that mature in Minnesota’s shorter growing season — and can be regrown year after year.

“That’s real impact,” he says. “Helping people grow food that’s meaningful to them, not just what's commercially viable.”

He’s also brewed plant breeding into something more relatable — literally. Coffee and beer have become unexpected tools in his mission to make science accessible. His undergraduate course on coffee, for instance, connects the dots between genetics, geography, and culture. “Everyone drinks coffee,” he says. “It’s a conversation starter. It’s a gateway into plant science.”