All three share the broad theme of precision management-tailoring inputs and practices to achieve better growth, quality, and economic outcomes.
1. Effects of Biochar and Fertilizer Source on Sweet Corn Production: Nitrogen Uptake, Biomass, Yield, and Quality Across Two Contrasting Years - Part I
This study examined the effects of combining biochar with different fertilizer sources on sweet corn growth, nitrogen uptake, yield, and quality. Results showed that biochar enhanced soil properties and nutrient retention, which in turn influenced nitrogen availability and boosted crop performance. However, researchers also observed that year-to-year weather variability played a key role in determining overall yield and nutrient use efficiency.
The implications for growers is that pairing biochar with the right fertilizer program can help growers get more out of their nutrients, reduce waste, and achieve more consistent yields from year to year.
2. High Planting Density Twin-Row Arrangement Produces Favorable Bulb Size Distribution in Short-Day Onion
This study Investigated how planting configuration and density affected onion bulb size distribution and yield. Scientists found that twin-row, high-density planting improved the uniformity in onion bulb size and increased the yield per acre of land, due to the more efficient use of space. They also discovered a positive influence on crop quality and marketable yield due to the new crop planting configuration.
While the twin-row planting arrangements did not outperform the commercial standard planting density in marketable yield, it does have potential applications for targeting specific bulb sizes by altering the bulb size distribution to favor smaller bulbs.
3. Biochar Rate and Fertilizer Source Influence Tomato Growth, Mortality, Yield, and Profitability
This study assessed how different rates of biochar and fertilizer sources impact tomato growth, survival, yield, and economic returns. Researchers found that biochar reduced plant mortality and enhanced soil fertility in tomatoes, as well as influencing plant growth and yield when paired with the right combination of fertilizer.
The research provides usable insights for growers to optimize soils amendments while reducing reliance on synthetic fertilizers, and improving climate resistance in Coastal Plain soils.
Dr. McAvoy is an Assistant Professor of Horticulture and Vegetable Extension Specialist at the University of Georgia. His field research focuses on all aspects of vegetable production in Georgia. His areas of interest include variety performance, disease resistance, fertilizer, irrigation and alternative crops. His extension work serves the vegetable industry by disseminating relevant information and providing practical data driven recommendations that increase productivity, sustainability and profitability.
The full articles can be found on the ASHS HortTehnology electronic journal website at the following locations: https://doi.org/10.21273/HORTTECH, https://doi.org/10.21273/HORTTECH05628-25, https://doi.org/10.21273/HORTTECH05626-25
Established in 1903, the American Society for Horticultural Science is recognized around the world as one of the most respected and influential professional societies for horticultural scientists. ASHS is committed to promoting and encouraging national and international interest in scientific research and education in all branches of horticulture.
Comprised of thousands of members worldwide, ASHS represents a broad cross-section of the horticultural community - scientists, educators, students, landscape and turf managers, government, extension agents and industry professionals. ASHS members focus on practices and problems in horticulture: breeding, propagation, production and management, harvesting, handling and storage, processing, marketing and use of horticultural plants and products. To learn more, visit ashs.org
