Nitrogen Cycle Summary | Tutorvista Nitrogen is an important structural component of many necessary compounds, particularly proteins. Atmosphere is the reservoir of free gaseous nitrogen and nitrogen compounds are found in bodies of organisms and in the soil. Living organisms cannot pickup elemental gaseous nitrogen directly from the atmosphere (except for nitrogen fixing bacteria). It has to be converted into nitrates to be utilised by plants. Nitrogen cycling involves several stages: Conversion of nitrogen into nitrates is called nitrogen fixation. 1) Atmospheric nitrogen fixation 2) Biological nitrogen fixation 3) Industrial nitrogen fixation Thunderstorms and lightning are the common photochemical and electrochemical reactions in nature, which convert atmospheric gaseous nitrogen to oxides of nitrogen. An average amount of 7.6 x 106 metric tonnes per year of nitrogen is estimated to be produced in nature. Chemical reactions are represented as: i) Rhizobium species in the root nodules of legumes (pea family) Proteins Ammonia
Search the Flora Europaea The data provided here have been extracted from the digital version of the Flora Europaea, the full version of which is held in the PANDORA taxonomic data base system at the Royal Botanic Garden Edinburgh. Click here for instructions on searching this data set. To search the data set, enter one or more words from the scientific name in which you are interested into the appropriate fields of the form. For example, enter family names in the Family name field, Genus names in the Genus name field etc. The Taxon name field allows for searches at ranks not covered in the other fields eg subspecies, section etc. The Rank name field will return names at any given rank, eg. select genus from the popup list to restrict the hits to the rank genus. The results of the searches from each field will be combined using a logical AND. N.B. To lookup Gentiana acaulis L., enter: Gentiana in the genus name field, and acaulis in the Species name field.
Improved Cowpea Storage Larry Murdock (right) and James "Jess" Lowenberg-DeBoer (center) receive the National Order medal from Gnisa Isaïe Konaté, Burkina Faso minister of scientific research and innovation. The Purdue faculty members received Burkina Faso's highest honor during a ceremony in the "Maison de Peuple" (House of the People) in Ouagadougou, Burkina Faso. (Burkina Faso National Institute for Environmental and Agricultural Research photo/ Quattara Kaly Amos) By Tom CampbellOctober 22, 2012 Purdue University College of Agriculture faculty members Larry Murdock and James "Jess" Lowenberg-DeBoer received the highest honor given by the West African nation of Burkina Faso for their work in improving storage of the staple cowpea crops. The Chevalier de l'Ordre National du Burkina Faso, the equivalent to the U.S. "The high-level honor we received is a direct consequence of the priority that the Burkinabés put on food security," Murdock said.
Agdia, Inc. - Plant Pathogen Test Kits. Make Your Own Ollas I first read about ollas (pronounced oh-yah) over at Little Homestead in the City. Basically it’s an ancient irrigation method that uses unglazed, porous clay pots buried within the root zones of plants. Water poured into the exposed necks of the pots (or pitchers) naturally seeps into the soil, providing a continuous supply of water to the plants. I’m intrigued by any method of watering that reduces consumption and is more natural. Ollas seem like the perfect answer, but premade ones can be expensive if you’re using them to irrigate everything. Then I found a gardener named Matt who posted an excellent how-to for making your own ollas using nothing more than inexpensive terra cotta pots. I followed Matt’s tutorial, and here’s how it went: This time of year they’re easy to find, and I bought these 15-inch pots for $1 each at Job Lot. You don’t want water flowing out of the bottom of your finished product. I should mention here that my adhesive of choice was Gorilla Glue. That’s it!
The British Mycological Society :: Home International Society for Molecular Plant-Microbe Interactions Global Buckets: Olla Irrigation (Clay Pot System) We've been inspired by Fan Sheng-chih Shu. His writings from the first century BC describe a method of irrigation where a unglazed clay pot is buried in the soil. When filled with water the clay pot turns into an amazing high-tech device. The micro-pores of the clay pot allows water to seep into the surrounding soil. A key characteristic is that the water seepage is regulated by the water needs of any nearby plant. Water Efficiency Combined with Liquid FertilizerSome designs (see below) allow you to bury the olla in the soil or potting mix. Combining Ollas with Global BucketsOnly one bucket is required and the use of power tools for drilling and cutting of buckets is eliminated. How to build your own Olla Global Bucket system:Step 1: Build the clay pot. Step 1: Build an Olla Seal the hole in what will become the bottom section of the clay pot. Next you'll need to attach the two clay pots together. We first use 100% waterproof Gorilla Glue. The finished product. A 4" clay pot is buried.
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