University of Georgia (UGA) Costa Rica is an official international residential campus of the University of Georgia. The campus is located in the small community of San Luis de Monteverde, Puntarenas, Costa Rica. ¡Pura Vida!
“Sustainability” has become a buzz word lately, with farmers around the world seeking to maximize profit while minimizing environmental impact. It takes a lot of time, money, and planning to create a sustainable agricultural system, and there is not a simple copy and paste system that will fit each farm. How, then, can we create and maintain a sustainable balance of give and take with our environment? Here at UGACR, we believe site-specific integrated farming is the answer, based on the specific goals of each farming operation. Read More »
In an interview with Scientific American, entomologist Mary Berenbaum points out that, without bees, the only part left of an entire Big Mac would be the bun! Wheat is wind-pollinated, but the cattle are fed bee-pollinated alfalfa and clover; lettuce and onions are bee-pollinated, as well as the cucumbers that become pickles.
Bees and other pollinators are incredibly important to agriculture as a way to pollinate plants that account for over one-third of our food supply, yet bees are facing their toughest fight yet against colony collapse disorder. At UGACR, we have a special garden to attract pollinators in a sustainable and organic way.Read More »
This is Part Three of a three part series on Local Effective Microorganisms (LEM) by Laura Ney and Kishan Mahmud. You can read Part One here and Part Two here.
On Wednesday, we looked at how LEM is made. Now, it’s time to look at the next step of the process.
After making the LEM we:
Planned and marked our plot layout
Planted our plots
Built shelters for the compost study
Learned how to isolate DNA
Plated samples of our 4 LEM barrels for bacterial and fungal colony counts
Brewed the LEM liquid phase
Sampled and collected over 100 gallons of swine effluent from the UGA swine unit
Designed and built CO2 respiration/ammonia volatilization chambers
Insulated our LEMs against U.S. winters
Designed and built an application system to apply our treatments
And took hundreds of base-line samples
After a long, very smelly day of mixing and applying our LEM, False-LEM and Swine Effluent treatments, on Thursday Dec 4th 2014, the project officially began!
Now the real work begins. We have gotten the project off of the ground. The next few years, both here and in Monteverde, we will be measuring microbial activity using home-made CO2 respiration and NH3 volatilization chambers. We will be extracting nematodes from soil samples and analyzing their numbers and community structure. We will extract DNA samples and determine the different types of bacteria that are present and surviving in the soils. We will perform many different chemical extractions in order to measure the available nutrients of the soils. And these are just some of the array of soil analyses that we will preform on our plots. We will also perform various crop analyses which include taking near infra red readings which compare chlorophyll levels (greenness) as well as measuring yield and nutrient content of harvested crops. And maybe at the end of it all, we will have a slightly better understanding of the mystery of nutrient cycling that is constantly going on beneath our feet. We would love to share our findings and along the way, explain some of the science and mechanisms behind why we are doing what we are doing and how soil does what it does.
This is Part Two of a three part series on Local Effective Microorganisms (LEM) by Laura Ney and Kishan Mahmud. You can read Part One here.
Before we can preform any kind of project studying LEM, we must have LEM. The fermentation process required for LEM to mature takes about a month, so making the LEM was one of the first things we did. In Costa Rica, we had been making LEM for over a year before I (Laura) had begun my project so we had the technique down. The ingredients that are required: semolina flour, molasses, charcoal, raw milk, yeast and of course, the leaf litter, were all things that were readily available on campus. We ordered the semolina through the same providers that we ordered our live-stock supplemental feed, we kept a constant stock of cattle molasses in a big 50 gallon barrel, we had sacks of charcoal from cleaning out the fireplace and raw milk is obviously not a problem when you milk your own cows. In the U.S. however, these simple items were not quite as easy to come by. We had to call multiple sources before we found reasonably priced 50 pound sacks of semolina flour, we cleaned Kroger out of their 4.5 pound bags of all natural charcoal and since selling raw milk in Georgia is illegal, we had to find a local, raw goat milk producer whose milk was sold under the clause that it was for pet consumption only. Not to mention having to find the 50 gallon, open topped, food-grade plastic barrels to store the LEM in.
Once we finally got all of our ingredients and barrels gathered together we had the task of mixing it all up. This was no small task since we were making four batches of this stuff. (We collected leaf litter from three different locations to see if there was a difference in microbial communities between the location plus we had to make one “False LEM”, which contains no leaf litter inoculant.) To make all four of these LEM batches, we hand-mixed 200 pounds of semolina flour, with over 50 pounds of crushed charcoal, three sacks of collected leaf litter and multiple gallons of goats milk and molasses. Once we were done, we shoveled them into their respective barrels, sealed the tops and just made it to our next class, looking and smelling like we’d escaped from a baked goods factory explosion.
Stay tuned for Part Three of our LEM series on Friday!
What is that smell? If you have had the chance to visit UGACR, you may have noticed a peculiar smell coming from the sinks, the restrooms or even the stable. It’s not a bad smell, but it’s also not a smell many people are accustomed to. It is the smell of local effective microorganisms (LEM) or microorganismos de la montaña (MM) if you are in Costa Rica. LEM is a living solution of microorganisms used for a variety of purposes including cleaning out plumbing and reducing the foul odors and flies associated with livestock. The punch that it packs, especially when smelled in it’s concentrated form, is due, in part, to the fermentation process that is used to produce it. LEM is made by collecting leaf litter from the forest floor and then mixing the litter (and all of the microbes that come with it) into a barrel full of sugar, flour and charcoal which serve as food for those microbes. The microbes and their food are then sealed in an air-tight barrel and left to “brew” for at least one month. After the fermentation step is completed the mixture can be seeped like tea in sugar water and applied in liquid form.
LEM, in its most concentrated form
Laura preparing to conduct research in the field
Kishan working in the lab
Kishan Mahmud and myself (Laura Ney) will be researching the effects of LEM in agricultural production systems under the direction of Dr. Dory Franklin in UGA’s Department of Crop and Soil Sciences. We will be looking specifically at the effect of LEM on nutrient cycling and plant availability when applied to forages and legume crops in conjunction with an organic nutrient source. We have the exciting opportunity to conduct our research in two entirely different ecosystems and climate zones – in the temperate piedmont of Watkinsville, Georgia and in the subtropical mountainside of Monteverde, Costa Rica. Conducting our research requires adapting our designs, materials and methods to the two very different environments that we are working in. It also involves manual labor, engineering, chemistry, biology and lots of manure. When we talk about all of the chemistry and microbiology research that we are doing, you may picture white coats, fancy machines and lab benches filled with chemicals and glassware. That is a pretty accurate description of our lab but in crop and soil science research there is a lot of dirty work to do before you put on that white coat. Over the course of the next week, we will be sharing some of the wide range of experiences that we have had thus far as we’ve begun our project, but first we’ll tell you a little about who we are.
I am a master’s student in UGA’s Department of Crop and Soil Sciences. I went to UGACR for the first time on a study abroad program as an undergraduate in 2009. I have gone back many times since then and spent a year working as a farm intern/naturalist after I graduated from the Horticulture department. I am passionate about sustainability and about the importance of understanding the incredible complexity of soil. I am thrilled to be able to continue my education in soil science while continuing my connection with the UGA Costa Rica campus.
I am a PhD student in UGA’s Department of Crop and Soil Science. I have been studying Soil and Environmental Sciences for the last seven years in Bangladesh, where I am from. My current research is in Georgia, on the locally derived effective microorganisms. While Laura will be focusing on crop quality, nematode community structure and soil nutrients, my work will be focused on microbial activity, microbial community structure and ecosystem services.