Measuring yield variability in a block of cherries has never been an exact science. For some growers, it involves sending someone to count the number of bins and roughly measure the distance between them - assuming there is time to do this during a busy harvest and assuming the person doing it remembers to write everything down.
But with tart cherry growers struggling to make ends meet, consistently measuring yield variability in their orchard blocks could lead to greater efficiency.
A research group from Utah State University is experimenting with a more efficient way to monitor and document yields and their variability, using technology to automate the process and integrate it into the harvest routine.
“One of the ideas behind precision management is to understand the field variability,” said Brent Black, professor and fruit specialist at USU. “If one part of the field isn’t very productive, maybe you don’t plant trees there or manage them differently.”
Black is leading the effort to develop a cherry yield monitoring system, part of a four-year, $2 million research project funded by the USDA Specialty Crop Research Initiative to optimize cherry orchard management practices.
The system designed by the Utah State University team resembles yield monitors found on grain combines rather than camera-based vision technologies that count individual fruits in high-density apple orchards.
It consists of three parts placed in different positions on a mechanical receiver for harvesting (the half that collects the cherries, not the shaker): a proximity sensor, a GNSS antenna, and a plastic box containing a computer, explained Anderson Safre, the graduate student who designed the yield monitor.
The sensor, positioned near the bin loader, uses sonar (sound waves) to detect when a full bin is placed on the ground. The GNSS antenna marks the precise time and location, and the computer records the data. The fruit yield is calculated based on the distance between each bin.
The first version of the yield monitor consisted of a spring-loaded mechanical arm. However, the arm kept breaking, so Black tasked Safre with redesigning it. For the new version, which can be built for under $400 per unit, Safre used low-cost, off-the-shelf components.
Last year they tested the current design in Utah orchards and found that the monitors provided reliable measurements of yield variability. Farmer Marc Rowley, who participated in the testing, said he uses a similar yield monitoring technology on his grain and alfalfa harvesters. The information helps him refine his production decisions, which can only benefit his profits, he said.
The yield monitoring system must account for the quirks of the cherry harvesting process. Mechanical harvesters grasp a cherry tree by the trunk and shake it until the cherries fall. The fruits fall onto a canopy and are funneled into a water-filled bin.
According to USU researchers, any yield variability monitoring system must account for the distance between trees, the volume of cherries in the bin, and where the operator chose to drop the bin.
Read the full article: Good Fruit Grower
Images: Good Fruit Grower
02 Sep 2025
The 2025 Spanish cherry season was marked by extreme weather, reduced volumes, and strong domestic demand. Despite initial quality issues, high prices and falling production in other countries helped Spain strengthen its role in Europe and look ahead to China.
05 Sep 2025
In frozen fruit B2B, the right balance between sweetness and acidity is essential: it shapes taste, formulations, compliance, and supply stability. A poor choice may lower consumer acceptance, raise costs, and undermine competitiveness in highly demanding international markets.
16 Jan 2026
B.J. Thurlby, who passed away at age 60, led the Washington State Fruit Commission for over 25 years. As a true ambassador for Northwest cherries, he championed research, exports and grower education, leaving a deep mark on the U.S. and international fruit industry.
16 Jan 2026
Frutas de Chile has revised its 2025/26 cherry export forecast down by 15% due to adverse weather, with shipments expected to reach 110 million boxes. To support sales, the Cherry Ice and Snow Festival launches in China, blending cherries, lifestyle and Lunar New Year culture.
