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Fertilizing Cool-Season Horse Pastures

By Krista Lea

Good pasture management begins with maintaining good soil fertility to promote the growth of desirable grasses, such as Kentucky bluegrass, orchardgrass, perennial ryegrass, and novel tall fescue. Now is an excellent time to review your soil fertility records and make plans for grazing this season.

Soil sampling can be conducted throughout most of the year, but early spring and fall are most common times to do so. Sample only the top four inches of the pasture, and divide large pastures into “sub-pastures” for sampling based on the varying topography.

Phosphorous (P), potassium (K), and lime

  • P and K promote plant growth and longevity, but plants don’t use lime directly. Rather, lime adjusts soil’s pH, making other nutrients more available for the plants to use.
  • Soil tests can help determine whether you need to apply P, K, or lime (and other nutrients), and applications might not be needed annually. High-traffic areas might not require P or K as it is recycled in animal manure.
  • P, K, and lime can be applied at any time of the year, as long as the weather is cooperative.

Nitrogen applications

  • A spring nitrogen application is generally not needed for cool season horse pastures because grass growth is naturally rapid in the spring. However, farms that have high stocking rates and intensive grazing can benefit from light nitrogen applications in early spring.
  • In the fall, apply nitrogen in two applications (30-60 pounds per acre each time) to prolong fall pasture growth and prepare plants for overwintering. Well-fertilized pastures will survive winter better and will green up sooner in the spring.
  • Only fertilize in the summer if harvesting hay or managing warm season grasses, such as bermudagrass. Be sure to apply it on cool days or use nonvolatilizing nitrogen sources such as ammonium nitrate.

While it’s not required to restrict grazing access to recently fertilized pastures, good horsemanship and pasture management suggests giving fields a week of rest or a good rain before returning animals to the pasture. For more information, see Soil Sampling and Nutrient Management (AGR-200) at uky.edu/ag/forage.

Source : uky.edu

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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.”