Tag: 夜上海论坛LM

Dirr professorship

first_imgBy Jason PeevyUniversity of GeorgiaThe University of Georgia has established an endowedprofessorship in the College of Agricultural and EnvironmentalSciences honoring legendary horticulturist and retired UGAprofessor Michael A. Dirr.The Michael A. Dirr Professorship for Woody Plant Instruction andIntroduction was approved by the University of System of GeorgiaBoard of Regents at its September meeting. It’s based in the CAESDepartment of Horticulture.The professorship has been filled by David Knauft, former CAESassociate dean for academic affairs. Knauft will maintain a woodyplant breeding and development program that supports theinterests of the horticulture industry.CAES Dean and Director Scott Angle said Dirr is one of theforemost authorities in woody ornamentals.“Dirr’s influence has left a mark on the horticulture industryand on the College of Agricultural and Environmental Sciencesthat will not soon be forgotten,” he said. “I’m very pleased thathis love for plants will remain at UGA through this professorshipand through Dr. Knauft.”Now retired and living in North Carolina, Dirr ran a roadsidefruit and vegetable stand as a child. That interest evolved intohis passion for horticulture.Dirr received both his bachelor’s and master’s degrees inornamental horticulture operation and management from Ohio StateUniversity in 1966 and 1971 and a Ph.D. in plant physiology fromthe University of Massachusetts at Amherst in 1972.In 1979, he became the director of the State Botanical Garden ofGeorgia, where he was instrumental in raising $3 million for thenew Visitor’s Center/Conservatory Complex and charted a coursefor a plant collections development. He returned to teaching andresearch at UGA in 1981 and was promoted to professor in ’84.Dirr has published more than 300 scientific and popularpublications and has authored or coauthored seven books. His”Manual of Woody Landscape Plants” is the most widely adoptedteaching and reference text in the country and has sold more than250,000 copies.With Charles Heuser, professor of horticultural physiology atPenn State University, Dirr also produced “The Reference Manualof Woody Plant Propagation,” which has become the standardreference for plant propagators.Dirr’s “Manual of Woody Landscape Plants” was honored by theAmerican Horticultural Society as one of the great garden booksof the past 75 years.(Jason Peevy is the capital campaign communicationscoordinator with the University of Georgia.)last_img read more

Pecan Production Costs

first_imgGeorgia’s pecan industry grew by more than 20,000 new acres in the last five years. Pecans are a booming business in Georgia, but University of Georgia Cooperative Extension pecan specialist Lenny Wells says that new farmers should go into the venture knowing that pecans are a costly investment.“Georgia growers who are looking to break into the industry need to be mindful of the various costs that are associated with the crop. A lot of people just see the finished product. They see pecans on the ground in the fall, think about the great prices and believe they can do the same,” Wells said.There are high startup costs associated with producing pecans and it takes “about six or eight years” for a commercial pecan crop to produce, according to Wells.“If you’re a grower, can you go that long without seeing a return on your investment?” he asked.Like other agricultural commodities, pecans have to be protected against insect pests and disease pressure, specifically scab disease. Wells believes that the most important factor to consider is irrigation. Nonirrigated orchards are strongly discouraged because pecans have a constant need for moisture.“Keeping your pecan orchards watered is a must. We have seen in research trials at UGA that in those trees that have irrigation, there is a substantial increase in yields per acre,” Wells said. “To even consider growing pecan trees without the benefit of irrigation is a mistake.”In one research study, Wells referenced a trial comparing nonirrigated orchards to those receiving 1,200 gallons and 3,600 gallons per day. The nonirrigated orchard produced 1,034 pounds per acre. The orchard irrigated with 1,200 gallons a day produced 1,374 pounds per acre and the orchard that received 3,600 gallons a day finished with 1,761 pounds per acre.While irrigation is a must to maximize pecan production, it’s also quite expensive. Most farmers implement a drip irrigation system, which averages about $800 per acre for system parts and installation. The costs increase depending on the size of the grower’s well and pump. Wells estimates another $35 to $60 per-acre cost to operate the irrigation system.As with other crops, pecans require a diverse set of equipment. Farmers just starting in the business immediately need a herbicide sprayer, rotary mower and small tractor. Other future equipment needs include an air blast sprayer, a dump wagon, a harvest wagon, a larger tractor, a blower, a sweeper, a harvester and a shaker.“There’s no doubt that growing pecans means that you need to buy or have access to pieces of equipment that you probably didn’t have or need before. They are specifically tailored to growing pecans, so it’s a costly operation to start,” Wells said.That said, Wells says that growing pecans can potentially bring future rewards.“If growers can just hang in there for the first several years and get their trees to produce a crop, there is money to be made in growing pecans. I’m not going to guarantee you a fortune, but you can make a profit if you accept the risks that come with producing this crop,” Wells said.last_img read more