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Below you'll see everything we could locate for your search of “phosphorus”
A team of University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers is investigating how changes in soil health impact citrus and other subtropical tree crops. Specifically, they will examine how quickly soil health can change in Florida and how specific changes might impact yield. The U.S. Department of Agriculture National Institute of Food and Agriculture is funding …
In the April Central Florida citrus Extension newsletter, multi-county citrus Extension agent Chris Oswalt discussed the fate of the nutrients nitrogen, phosphorus and potassium in soils that have elevated pH values. Here’s most of the discussion he presented: Soil pH can affect several reactions involving nitrogen in the soil solution and the efficient use of this nitrogen by plants. Nitrification, …
While whole fruit consumption increased in adults between 2003 and 2016, the intake of several key nutrients decreased over time, a new study shows. Adding 100% orange juice (OJ) to the diet could help address this shortfall and bolster intake of other key nutrients found in OJ. A cross sectional analysis using the nationally representative National Health and Nutrition Examination …
By Ajia Paolillo On July 1, 2020, new record-keeping requirements went into effect for nitrogen and phosphorus amounts applied by growers enrolled in the Florida Department of Agriculture and Consumer Services (FDACS) Best Management Practices (BMP) program. These records are required due to the passage of Senate Bill 712, the Clean Waterways Act. Citrus growers have been asking many questions …
Florida’s new Clean Waterways Act impacts agricultural landowners and producers enrolled in the Florida Department of Agriculture and Consumer Services (FDACS) Best Management Practices (BMPs) program. The act went into effect July 1. FDACS is required to undertake implementation verification (IV) site visits on properties enrolled in the BMP program every two years. During these IV site visits, FDACS Office …
Researchers on the Indian River have proved “there is something in the oak leaf that can work” against HLB, said Lorenzo Rossi. “I’m not saying that I found the cure, and I’m not saying that oak extract will save the citrus industry.” He described oak extract, and possibly oak mulch, as another tool against HLB. Rossi, a University of Florida …
By Manjul Dutt and Jude Grosser Finger lime, a distant relative of sweet orange and grapefruit, is a relatively new crop species for Florida. It is an Australian native species that has been gaining in popularity and importance in the last few years because of its unique fruit characteristics and disease tolerance, which sets it apart from conventional sweet orange …
By Rhuanito Soranz Ferrarezi, Dinesh Phuyal, Davie Kadyampakeni and Kelly Morgan The Indian River District is the world’s premier grapefruit production region due to a warm, ocean-facing humid climate and Flatwoods soils. The geographical location leads to the production of fruit with thin rinds and exceptional juice and color that has been a high-value export delicacy in Europe and Asia. …
By Tripti Vashisth Constant supply and soil application of macronutrients and micronutrients can improve the health and productivity of HLB-affected citrus. A 20 to 50 percent higher than University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) recommended rate of micronutrients is beneficial for HLB-affected trees. However, the nutrition program should be customized for each grove, as no one …
A Dec. 16 discussion of local agricultural issues with a focus on best management practices (BMPs) attracted more than 50 attendees to Immokalee. The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Southwest Florida Research and Education Center hosted the event. Professor and center director Kelly Morgan summarizes the discussions, which he says included “some of the success …
By Lorenzo Rossi, Ute Albrecht and Evan Johnson Citrus root systems are confronted with many challenges that limit resource availability needed for tree productivity. Challenges are compounded by huanglongbing (HLB), which now affects nearly all citrus trees throughout Florida’s production areas. Contrary to the above-ground portion of the tree, study of the below-ground portion is considerably more difficult. This article …
By Mongi Zekri, Davie Kadyampakeni, Tripti Vashisth, Kelly Morgan, Tom Obreza and Brian Boman Microirrigation is an important component of citrus production systems in Florida. For citrus trees, microirrigation is more desirable than other irrigation methods for several reasons: water conservation, fertilizer management efficiency and freeze protection. Research has shown that when properly managed, water savings with microirrigation systems can …
At Citrus Expo in August, Eric Triplett presented research from a variety of sources that shows foliar phosphate fertilization reduces HLB symptoms. Triplett is a University of Florida Institute of Food and Agricultural Sciences professor and chair of microbiology and cell science. “If it’s true that we can reduce the symptoms and disease in citrus by foliar phosphate fertilization, the …
As Florida citrus growers look to recover from the damages of Hurricane Irma and continue to cope with citrus greening, University of Florida (UF) scientists suggest using a complete and balanced nutrient program in their groves. “Mineral nutrition plays a vital physiological role in the growth and development of a plant and as well as in plant-defense response,” said Tripti …
By Tripti Vashisth Mineral nutrition plays an essential role in a plant’s life cycle and is critical for its growth and development. Since the early 19th century, the importance of mineral nutrition for plants has been recognized, and fertilization has become an important aspect of crop production. At least 17 mineral nutrients are considered essential for plants. These include carbon, …
By Pete Spyke, Joby Sherrod and Jude Grosser Part 1 of this article, published in the April 2017 issue of Citrus Industry magazine, provided some background information on controlled-release fertilizer (CRF) along with a discussion of practical applications in citrus production. This article, part 2, includes summaries of observations from several case studies in which CRF has been applied for …
Tripti Vashisth, a University of Florida/Institute of Food and Agricultural Sciences horticulturist, reports on brassinosteroid and nutrient uptake studies aimed at alleviating HLB symptoms. She reported on these studies at a recent HLB Grower Day summarizing scientific presentations made at an international HLB research conference. The brassinosteroid (a plant growth regulator) study was conducted at the University of Havana in …
Recent studies shed light on foliar nutrient and irrigation practices. By Kelly T. Morgan and Said Hamido Most citrus growers are well aware that citrus greening (HLB) is one of the most devastating citrus diseases in many parts of the world. The disease is widespread in Florida, Texas, Brazil, Mexico and other major production areas, causing significant concerns about the …
By Kelly Morgan Nitrogen and phosphorus are essential nutrients for plants and animals and are the limiting nutrients in aquatic environments. The correct balance of both nutrients is necessary for a healthy ecosystem; however, excessive nitrogen and/or phosphorus can cause significant water-quality problems. Typically, nitrogen is the limiting nutrient in spring and surface water systems. Therefore, even modest increases in …
University of Florida (UF) researcher Kelly Morgan discusses a study of how citrus growers are adjusting irrigation water pH levels, and what pH levels seem to work best. The acid level of citrus irrigation water has become an important consideration since HLB was discovered in Florida groves in 2005. “Jim Graham (a fellow UF researcher) has been conducting a survey …
