Assessing the Impact of Sulfur Application on Potato Sulfur Uptake and Yield in Sandy Soils of Florida.

Sulfur (S) is an essential nutrient vital for ideal plant growth and optimal crop yield. Potatoes in sandy soils of northeast Florida often face challenges due to low organic matter content and a high water table. The S application guidelines must be developed to avoid the under and over-application of S and to optimize integrated nutrient management plans for potatoes in Florida's sandy soils. A comprehensive study evaluated the response of S application in potatoes with S uptake, tuber yield, and quality. For 2 years (2021 and 2022), separate field experiments were conducted at three different locations, while location 1 had a trial replicated (Trial 1 and 2). The study was established in a randomized complete block design with four replications, in which five different rates (0, 45, 90, 135, and 180 kg S ha−1, as gypsum [17% S]) were applied at pre-planting. The results of this study show variations in soil-available S concentrations in response to different application rates and sampling times. The dry above-ground biomass production, S uptake, and potato tuber yield remained largely unaffected by S application. However, specific gravity at location 1 reported the response of the S application in interaction with trials. Location-specific effects, compounded by yearly variations, played a significant role, particularly at location 1. External and internal tuber quality showed inconsistent responses to the S application and interactions with trials and year factor. This study reported the significant influence of irrigation water (containing high amounts of SO42−) on the overall experiment. So, these findings underscore the importance of water nutrient concentration in developing crop nutrient recommendations. In conclusion, this study provides valuable insights into the complex relationship between S application, S uptake, and yield in the unique agricultural context of the sandy soils of Florida. [ABSTRACT FROM AUTHOR]