Share Facebook Twitter Google + LinkedIn Pinterest Due to heavy rainfall and saturated soils during the 2017 growing season, it is not surprising to see some signs of nitrogen deficiency showing up in corn fields across Seed Consultants’ sales footprint. Whether applied preplant or sidedressed, patterns of heavy rainfall and wet soils increase the likelihood of nitrogen being lost. Because nitrogen is an essential nutrient for corn plant development and ultimately yield, losses will impact final yields this fall.When saturated conditions persist, nitrogen can be lost though leaching or denitrification. Leaching (more likely to occur in course-textured soils) is the process where nitrogen is moved down through the soil profile and out of the root zone where it is not available to plants. The severity of nitrogen loss due to leaching is impacted the intensity and duration of rainfall. Denitrification is the process where soil nitrogen is biologically converted to gaseous nitrogen and lost to the atmosphere. During denitrification, microorganisms break down soil nitrogen and convert it to nitrogen gas when soil is saturated and oxygen is limited.Nitrogen deficiency symptoms initially appear as a “V” shaped yellowing on lower leaves that begins at the tip and progresses toward the stalk. Nitrogen deficiency can also cause ears with tip-back, poor kernel set, and shallow kernel development. Fields that have experience excessive rainfall, ponding, and saturated soils could be exhibiting the symptoms discussed above.While nitrogen deficiency can impact grain yield, another concern for eastern Corn Belt farmers this fall is stalk integrity. When nitrogen deficiencies exist, the corn plant will “cannibalize” its own stalk to produce an ear. As a result, stalks will be weakened and will be prone to lodging this fall. Fields where nitrogen deficiency has been observed should be harvested in a timely manner this fall to avoid harvest losses due to lodged corn plants. For more pictures and information on corn nitrogen application and deficiency symptoms, click here.
dana oshiro Why Tech Companies Need Simpler Terms of Servic… Related Posts A Web Developer’s New Best Friend is the AI Wai… Tags:#Microsoft#web Microsoft’s Silverlight 3 and Expression 3 were released on July 9th to favorable reviews. The original Silverlight shipped in Fall 2007 as Microsoft’s first programmable web browser plug-in. It’s a 4MB Flash/Flex competitor that runs on Mac OS, Windows, Linux, and mobile devices. While Flash definitely holds the market share for machine installs, according to Microsoft, “In less than nine months since its release, more than 1 in 3 Internet devices now have Silverlight 2 installed.” While this market penetration may seem high to some, the fact that Silverlight does not have widespread name recognition is perhaps a testament to the seamlessness of the service. In it’s third iteration, Silverlight 3 offers some interesting new features including the following improvements:1. Streaming Support: Silverlight changes and adapts the video quality of a media file based on available bandwidth and CPU conditions in order to deliver an optimized viewing experience. This provides support for live and on-demand true HD (720p+) streaming. Video giant Netflix first employed the platform in 2007 to power its instant viewing service. With the new streaming support, the only thing holding back HD video sites is their own limited catalogues. 2. Sketchflow: Expression Studio’s SketchFlow allows for rapid user interface prototyping. This means that concepts and projects can evolve seamlessly without the need for lengthy redesigns. Developers are also able to apply their sketches to a 3D plane and add animation and annotations to them. Designers and developers are reporting that Sketchflow cuts down mock up times significantly. 3. Out-of-browser Capabilities: Similar to Adobe’s AIR and Mozilla’s Prism, Silverlight enables applications to be placed in a restricted store on a users machine. Users are then provided a direct link to the application from their desktop or start menu. Silverlight also tests for a network connection and automatically syncs and stores files depending on that connection. This ensures point back up. One of Silverlight 3’s early projects is French-based Eeple’sBoard. The project was started by a 19-year-old computer science student and is a virtual cork board with pictures, posters and articles. As with a real cork board, messages and notes can be layered to produce a media collage. In this case, the media includes videos, blog posts and music files. A year ago, Silverlight’s penetration was 17%, today it’s at a third of all users. Compared to the 99% market penetration of Flash 9 and 86% penetration of Flash 10, this is extremely low. It will be interesting to see if Silverlight 3’s features will increase the rate of adoption. Partnerships will certainly play a key role in how the market is carved out in the years to come. Top Reasons to Go With Managed WordPress Hosting 8 Best WordPress Hosting Solutions on the Market
After a decades-long career in high-end, single-family renovation and construction, and a relatively new business providing consulting and certification services for the same market, I recently became involved in several multifamily projects. Starting with National Green Building Standard (NGBS) certification on a market-rate apartment building that was completed in 2010, I am now in the early stages of LEED certification for several affordable projects throughout the southeast.First off, let me say that it is very exciting to see how much affordable housing is being built to green home standards. It appears to me that between various incentives available, and housing authorities recognizing how sustainable building can positively affect the long-term value of their properties, that high-performance housing is well entrenched in this sector. This is reinforced by current statistics from LEED for Homes showing that over 50% of their certified units are in the affordable sector.So What’s The Problem?For those of you who follow my other posts on this site under the Green Curmudgeon banner, you must be thinking, “when will he start whining about something?” Patience, gentle readers, we will get there soon enough.It is always been interesting to me to compare different projects and how they score in various rating systems. Since most green building programs provide significant incentives for density and location in walkable communities, multifamily urban projects tend to start out with a point advantage over less dense, more remote projects.The NGBS project was a 282-unit, eight-story concrete and steel-framed building. Since I was brought in fairly late in the process (just before insulation, actually), there were challenges in obtaining the certification. Budgeted for fiberglass batt insulation, we spent many weeks training, inspecting, and retraining their installers to aim for Grade 1 installation quality.Now anyone who has read my recent post on batt insulation knows, I am not a fan of batts, regardless off what they are made out of, and my experience with recent projects has done nothing to change my opinion.A Recurring ProblemThe same problem came up recently on another project, this one 100 units of affordable duplex gut renovations in Macon, Georgia, home of The Allman Brothers and Little Richard, among notables. This project, known as Felton Homes is an interesting project, consisting of a neighborhood of slab-on-grade, solid brick 1940s era buildings that are being gutted, slightly expanded, and completely remodeled.All the homes are planned to be certified as Energy Star, EarthCraft House, and LEED for Homes. Although I submitted my proposal for LEED certification months before, I was not brought in to start the process until the first building was just about ready for insulation, which leads to the first concern.The existing brick walls are being coated with 1½” of high-density spray foam between furring strips on both the interior and exterior, and the roofs will have low-density spray foam applied to create conditioned attics — both very good decisions. But here’s the rub — for some reason, they specified fiberglass batt insulation in the new exterior wall sections, of which there are very few. And to add to the problem, these walls are framed with metal studs, providing an excellent thermal bridge in the walls.Our first site inspection led to removal of every batt (thankfully not too many in this case) to point out gaps and compressions, and extended discussions with the project team about proper installation. Of course, the cost to upgrade to a spray or blown-in product came it too high to change, but they are still in negotiations on that subject. This is an example where a generally very well designed and specified project could have been even better had energy and green building consultants brought in early in the design process rather than as an afterthought.Anticipating a problemOn yet another project, 18 affordable townhomes in Chattanooga, Tennessee, also scheduled for LEED certification by myself and Abe Kruger of Kruger Sustainability Group, we were brought in towards the end of the design process, just as documents were being released for bids.In our discussions with the architect, we expressed our concerns with batt insulation, but they made it into the specs. Now, as construction is just getting ready to start, we are in discussions with the contractor and his insulation subcontractor about Grade 1 installation. While this quality was written into the specifications, it appears that the installer doesn’t really understand what it takes to achieve it, we are advising them to anticipate having to remove and reinstall most, if not all, of the batts for the first few buildings unit they get it right, and we are urging them to upgrade to a blown or spray product. It will be interesting to see how this resolves itself.Wasted Breath and Good DecisionsSometimes I feel like I am wasting a lot of breath going over the issues with batt installation with project teams, but in the case of Felton Homes, the day after we left the job site, I was copied on an e-mail from the project manager, directing his supervisor to remove the batts and install spray foam on the first two units in order to get ready to hang drywall. When the added cost of the spray foam was weighed against schedule delays, it came out the winner. Once I clearly communicated to the project team how difficult it would be to get Grade 1 quality, they made a good field decision.Interestingly, Grade 1 insulation is not a specific requirement of LEED for Homes, while it is necessary to achieve EarthCraft House Platinum level certification.Overall, I am heartened by the amount of high-performance affordable housing currently under construction and renovation. I appreciate the opportunity to work on these projects, offer my expertise, and help make them as efficient as possible, all while working within budget constraints. I’m looking forward to seeing upcoming projects break ground, and, hopefully, work on many more in the future.Closing moteAn introduction is in order: Carl Seville, GBA’s Green Curmudgeon, joins Amy and Peter on the Green Communities blog. Welcome aboard, Carl!