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Fertility Considerations for Winter Wheat

Fertility Considerations for Winter Wheat
By Brittany Clark and Nicole Santangelo
 
Let’s first take into consideration the nutritional requirements of winter wheat and what your soil can offer.
 
As with other crops, wheat fertility programs are best determined by a soil test that will assess pH, phosphorus, and potassium needs. A soil test is critical to assessing what capabilities your soil has and what you will need to amend. Without a soil test you may be missing yield opportunities by under fertilizing your crop or over-fertilizing the crop - wasting money, potentially causing issues in your cropping system, and eating up profits.
 
We can address winter wheat needs with a combination of fall fertility and manure. Nitrogen applications should be based on yield goal and split between fall and spring. Some additional considerations for fall fertility:
  • Maintain an optimum pH between 6.0 and 7.0 to limit winterkill and maximize nutrient availability.
  • Nutrient removal for wheat approximately is 0.7 lbs of P2O5 and 2 lbs of K2O for each bushel produced. This assumes the straw is removed. Apply phosphorus and potassium fertilizer in the fall, prior to planting for best results. Ideally, all of the phosphorus and potassium may be broadcast prior to planting, but if soil test levels are near optimum then delaying until after harvest would be an option to replace removed nutrients. Harvesting straw can deplete potassium levels quickly if this is not considered and may result in a potassium deficiency in subsequent crops. Straw nutrient removal for a two-ton crop is on average 8 lbs P2O5 and 46 lbs K2O.
  • Having some fall nitrogen availability is critical to promote tillering and maximize yield potential. Often this need can be met by residual soil nitrogen from previous crop residues like soybean, but if the proceeding crop is corn, and the corn yield exceeds expectations, we may want to apply 20-40 lbs of nitrogen in the fall. This application ensures that we have enough availability to promote vigorous fall tiller development.
  • Manure can be an economical way to meet phosphorus and potassium needs, and supply nitrogen. Because of the potential for lodging it is very important to take the full credit for manure and residual N from previous applications. Wheat does not require large amounts of N until stem elongation, Feekes GS 6. Therefore, most of the N should be applied in a spring topdress.
  • To learn more about winter wheat and other small grain management, please join us for our October 29th ‘Small Grains’ webinar in our Grain Crop Production Series . This webinar will cover small grain management from planting to harvest. The cost is $15 for all three webinars (small grains, corn, soybeans), and includes a PDF digital copy of the Agronomy Guide. Pesticide and CCA credits available, pending approval.
Source : psu.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.”