Scientists find way to surgically strike out weeds that impede crop growth — ScienceDaily News

By using a combination of fumigants, University of Florida scientists believe they can surgically strike out some weeds that otherwise get in the way of vegetable growth.

Researchers with the UF Institute of Food and Agricultural Sciences have shown that farmers can place fumigants in specific zones, rather than using a single treatment for every situation. For example, fumigants applied to a specific area where weed seeds germinate can reduce the number of weeds that grow. Researchers say this will help growers as they try to manage pests in areas where they cause the most trouble.

As a rule, growers manage pests by injecting fumigants into soil at the bottom of a raised bed to kill pests and pathogens in the bed of the soil. For the past several years, UF/IFAS researchers have worked to develop management zones.

“The concept of management zones is novel for Florida but also for other regions across the United States,” said Nathan Boyd, a UF/IFAS associate professor of weed science. “For weed control, we are suggesting that you apply it close to the surface where the weeds grow.”

It’s important to knock out the weeds because they can impede the growth of tomatoes, bell peppers and strawberries, among other crops. A weed known as nutsedge reduces pepper yield by about 70 percent, and it can cut tomatoes by 50 percent, according to previous UF/IFAS research.

For the past several years, Joe Noling, a professor of nematology at the UF/IFAS Citrus Research and Education Center; Gary Vallad, an associate professor of plant pathology, and Boyd — both at the Gulf Coast Research and Education Center — have worked on developing the management zones for soil fumigants.

In a new study, UF/IFAS researchers adequately controlled weeds with a combination of dimethyl disulfide and metam potassium.

Boyd likened the weed-management zone to taking care of your lawn.

“Think about your lawn for example,” Boyd said. “There are areas where weeds are worse than others, or areas where grass does not grow as well. If you want a healthy, nice-looking lawn, then you need to focus on the problem areas. What we have developed is a similar concept. If you control the weeds with the fumigants, there is no need to apply herbicides. The key is better use of pesticides, which can result in an overall reduction in pesticide use.”

The new research is scheduled to be published soon in the journal Crop Protection.

Story Source:

Materials provided by University of Florida Institute of Food and Agricultural Sciences. Original written by Brad Buck. Note: Content may be edited for style and length.

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Therefore, I urge you, brothers and sisters, in view of God’s mercy, to offer your bodies as a living sacrifice, holy and pleasing to God—this is your true and proper worship.

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Construction Videos – KUBOTA DRAFT4 2 1 – #Construction #Videos

I. Background

Client and Agency had a meeting to present the revised offline edit of Kubota AVP. There were additional comments on the video, which are stated below.

II. Highlights and Agreements

Sequence 1
1. Take out extreme close up shots of Mr. Okaze and replace with training video clips. Only the starting and ending spiel on cam of Mr. Okaze shall be retained.
2. Add subtitle for Mr. Okaze’s spiel.

Sequence 2
1. Extend the title card (New Horizon: Farm Mechanization) earlier (align with “We have looked forward to a new and brighter horizon in agriculture and it is finally here…”).

Sequence 3
1. Add a few seconds transition prior mention of the machine (for transplanter and harvester) when introduced.
2. Take out Steps in Seedling Preparation. Retain the line “However, prior to seed planting, farmers must practice proper seedling preparation to ensure a successful harvest” and then continue to line “With Kubota Walk-Behind Rice Transplanter, gone are the days of laborious manual seed planting…”.

III. Next Steps

1. Agency to address the comments.
2. Agency to present the revised edited AVP prior online process.


I know that my redeemer lives, and that in the end he will stand on the earth.

Heavy Construction News – #reuters #News

The Trump administration’s crusade for coal-based energy was dealt two setbacks during President Donald Trump’s “Energy Week” in late June. Mississippi Power suspended commercial startup of a “clean coal” lignite gasification and carbon-capture combined-cycle generating project in Kemper County, Miss., whose costs exceed $7 billion. Also, a U.S. federal appellate court in Virginia on June 29 overruled a lower court order for the U.S. Environmental Protection Agency to analyze how its regulations have affected coal-industry jobs.

Trump said on June 29 that the U.S. has a 250-year resource of “big beautiful coal,” but industry jobs have dwindled in past years from automation and low natural-gas prices. Those prices also are a key factor in the Kemper decision. In February, Mississippi Power said an updated market analysis shows that a drop in projected long-term natural gas prices of 25% to 30% have had a negative effect on the project’s economic viability.

“Natural-gas fracking has changed the entire energy landscape,” says Paul Patterson, an analyst at Glenrock Associates. Kemper was planned when natural gas prices were high, but was built as fracking produced large mounts of gas and falling prices. Project development began in 2006, a year after Hurricane Katrina sent gas prices soaring. Construction started in 2010.

Mississippi Power and its parent, Southern Co., said on June 28 that their decision to immediately suspend gasifier start-up and operations is appropriate to manage costs and address the state Public Service Commission’s plan to relicense the plant only to burn natural gas. The commission said on June 21 that a settlement between the power firm and regulatory staff would remove the risk and keep power rates flat or lower. The commission will rule on Kemper’s future on July 6.

Mississippi Power applied for permission to build the 582-MW plant with the intent that it primarily burn synthesis gas converted from lignite using technology developed by Southern, KBR and the U.S. Energy Dept. The plant, originally set to cost $2.2 billion with a commercial operations date of November 2013, would be able to capture and sequester 50% of its carbon dioxide emissions. These would be piped to depleted oil fields for enhanced recovery.

The now $7.5-billion project produced syngas and operated for 200 days on lignite, but it did not attain commercial operation, Mississippi Power says. The gas-fired plant began operating in 2014, but problems have occurred with its gasifier, not the carbon capture technology. The 6-MW thermal gasifier was scaled to 580 MW in one step, says John Thompson, director of the Clean Air Task Force’s fossil transition project. “That was an invitation for problems,” he says.

The project was complicated with other hindsight errors, says Thompson. Plant design was not complete at the start of construction, and cost overruns kept building, he says. Supporting equipment had scaling trouble, and syngas coolers had problems. Major changes had to be made to piping, including thickness, metallurgy, quantity and supporting structures, which drove up the cost. In the process of turning lignite to syngas, the lignite drops through the gasifier and partially oxidizes. The carbon dioxide is separated out and remaining syngas goes into the turbine. But there were problems with the syngas cooler, says Thompson, adding, “We are disappointed it didn’t work.”

Meanwhile, the vacated lower court ruling that had ordered the coal industry regulatory analysis was prompted by a suit filed by Murray Energy. It was set to include economic impacts of reduced jobs and plant closings. But the ruling was based improperly on the Clean Air Act, says Ann Weeks, legal director for the Clean Energy Task Force, of the appellate court’s legal argument. “This was a win for the rule of law,” she says. The ruling came just days before EPA’s deadline to submit the analysis. Murray Energy is set to appeal, Gary Broadbent, its senior corporate counsel, told ENR on July 3.

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And we know that in all things God works for the good of those who love him, who have been called according to his purpose.

Construction Videos – construction equipment & construction machinery training & japan used construction machinery – #Construction #Videos

They buried the old street, record belongs to the city special automatic rendering mechine memory. This year, Hangzhou will be the preservation and restoration of the urban historical building list officially released, involving a total of 50.
Reporters from the Hangzhou City Housing Department learned that the District reported new plastering machine to the automatic plaster rendering machine renovation plan and historical building property (using), property (using) the applicant submit renovation, and ultimately determine the this tupo machinery year’s renovation project.
The 50 historic buildings conservation renovation project including the hidden house, auto rendering machine on the city of Zhongshan Road No. 337 building, 26; under the city of Zhejiang science plastering machine saudi arabia and Technology Museum and the crash middle school site, 4; Xihu District, Li Puyuan’s former residence and other 5; Gongshu District Hangzhou silk union buildings external render machine for hire exeter plaster techniques in orthopaedics at 4; in West Lake the scenery scenic spot area Weng Shan primary school site, ez renda tupo rendering machine price famous brand rendering machine for internal wall plastering 9; and the mountain of Binjiang District was 67, 2.
In the 50 to be renovated historical building, there is no lack of “in the name of”. For example, in white Fu Lu Yin Road No. 5, close to the lake village. rendering plaster machines application This was built in the 20’s of last century building, is a building in the many-storied buildings in Western Les automatic rendering machines Loges Du Park Hotel. The main rendering plaster machines application building faces south, three Bay three story open floor, room 40. The eakl plastering spray machine foshan house has a large main hall corridor, four love owne column 4 meters high in the supporting pillars plaster techniques in orthopaedics building construction machinery at the bottom elevation, the stone carved base. Around the house and hang around the house, you’ll find out rendering automatic wall plastering machine videos m-tec 300 screeding/ plastering machine utiform putzmeister turbosol plastering the plastering machine for sand and cement lobby floor mosaic, ez renda famous brand how to working wall plastering mashine dounload rendering machine for internal wall plastering on top of the ceiling gypsum ceiling, wooden stairs, and the doors along the ledge, beautifully carved decoration are preserved.
The implicit Lu master, the KMT is major general Lv Mingui, his house in the lakeside home that year, personally involved in the design and build the house of the villa. However, with the turmoil, the implicit Lu master also several times change, once the British cordon house. In 1938 wallplastering machines in china August, Secretary of Zhejiang province postal service auto plaster machine Corden was occupied by the Japanese because of the city station management office, rendering plaster machines application bureau office located at white Fu Road, temporary plaister machine vedio residence. In the ocean, “guest” governance by government, foreigners firmly tupo plastering machine in control of building construction China Post, this is a history of humiliation. During the period of Anti Japanese War, here is the Japanese officers’ club. Until after the victory of Anti Japanese War, the implicit Lu returned to the hands of Lv Mingui. buy construction equipment After cement rendering machine in kerala the founding of new China and many houses here, has become a “72 tenants house.
In addition to the implicit Lu, but also many other stories of the old house. For example, Zhongshan Road No. 337 building, this building three room two two slope roof tiles and brick buildings, was cement plastering machine the commander of the 100th army June old home, and later was also “Zhengda textiles” shop for.
Said Paul Housing Department staff Hangzhou City, completed the 50 historic buildings after repair, will return the original purpose, and some will be given a new life. For example, the implicit Lu will be included as part of the lake, the protection planning of new The Inn Boutique


The one whose walk is blameless, who does what is righteous, who speaks the truth from their heart; whose tongue utters no slander, who does no wrong to a neighbor, and casts no slur on others.

Heavy Construction News – First experimental evidence of ‘orbital-selective’ electron pairing in an iron-based high-temperature superconductor — ScienceDaily – #Construction #News

Combining neutron and X-ray imaging gives clues to how ancient weapons were manufactured

A team of scientists has found evidence for a new type of electron pairing that may broaden the search for new high-temperature superconductors. The findings, described in the journal Science, provide the basis for a unifying description of how radically different “parent” materials — insulating copper-based compounds and metallic iron-based compounds — can develop the ability to carry electrical current with no resistance at strikingly high temperatures.

According to the scientists, the materials’ dissimilar electronic characteristics actually hold the key to commonality.

“Scientists have thought that because the starting point for superconductivity in these two classes of materials is so different, you need different theoretical approaches to describe them,” said J.C. Séamus Davis, a physicist at the U.S. Department of Energy’s (DOE) Brookhaven National Laboratory and Cornell University, who led the team of experimental scientists. “Instead, we’ve been motivated to explore what is universal about these two systems. Ideally, there should be just one explanation.”

Scientists have generally understood that the mechanism of superconductivity in copper oxide compounds depends on the ability of electrons on adjacent copper atoms to pair up. Each copper atom has a single, unpaired electron in its outermost energy shell, or orbital. While the outermost electrons on adjacent copper atoms interact with one another strongly, they ordinarily stay locked in place, stuck in a “quantum mechanical traffic jam” with nowhere to go, Davis said. With no electrons moving, the material acts as a “strongly correlated” electrical insulator.

Removing some of the electrons that reside on copper atoms results in electron vacancies known as holes. This alleviates the quantum traffic jam so that, when the material is cooled to a certain temperature, oppositely aligned electrons (magnetic partners where the “spin” of one electron points up and the adjacent one points down) form pairs and then become free to zip through the material unimpeded-a superconductor.

Iron atoms, which have a nucleus with smaller positive charge than copper, exert less pull on the circulating electrons. So instead of filling up electron orbitals, electrons in several outer energy orbitals remain unpaired, yet aligned with one another and electronically active. The alignment of unpaired electrons in multiple orbitals gives simple iron its strong magnetic and metal properties, so it’s easy to see why iron compounds would be good conductors. But it’s not really clear how they could become zero-resistance superconductors at high temperatures without the strong interactions that create a correlated insulating state in the copper based materials.

To address this conundrum, theoretical physicists began to consider the possibility that the unpaired electrons in iron’s different orbitals could take on very different roles. Perhaps unpaired electrons in one particular orbital could pair up with electrons in the same orbital on an adjacent atom to carry the supercurrent, while electrons in the other orbitals provide the insulating, magnetic, and metallic properties.

“The challenge is to find a way to see that some of the electrons are superconducting and some are insulating in the same crystal,” Davis said.

The research published in Science provides the first direct proof that such “orbital-selective” electron pairing takes place.

The theory team for this project-Andreas Kreisel (University of Leipzig), Peter Hirschfeld (University of Florida), and Brian Anderson (University of Copenhagen)-defined the electronic signatures that should be associated with each orbital on the iron atoms. Then, experimentalists Peter Sprau and Andrey Kostin (both of Brookhaven Lab and Cornell) used a scanning tunneling microscope at the Center for Emergent Superconductivity-a DOE Energy Frontier Research Center at Brookhaven Lab-to measure the energy and momentum of electrons in iron-selenide samples that were synthesized by Anna Bohmer and Paul Canfield at DOE’s Ames Laboratory. Comparing the measurements with the predicted electronic signatures allowed the scientists to identify which electrons were associated with each orbital.

With this information, “We can measure the binding energy and momentum of electrons in the ‘Cooper pairs’ responsible for superconductivity and identify which energy momentum characteristics they have-which orbital they’re from,” Davis said.

“We were able to show that almost all of the electrons in Cooper pairs in iron selenide were from a particular lower energy orbital (the d_yz orbital),” Davis said. The findings also imply that the electron in iron’s outermost orbital in iron selenide exhibits virtually insulating properties, just as it does in the copper oxide compounds.

“Because iron selenide normally exhibits good metallic conductivity, how would one ever know that the electrons in this orbital are acting as they are in correlated insulators? This strongly interacting and virtually insulating state was hiding in plain sight!” he said.

With this outer-orbital insulating state, the iron compound has all the same requirements for superconductivity that the copper oxides do-a strong magnetic interaction (up/down pairing) of the almost localized electrons, and a metallic state that allows those pairs to move. The big difference is that in iron selenide, these contributions come from different electrons in three separate active orbitals, instead of the single electron in one active orbital in copper.

“In iron you have the conductivity for free. And you have the magnetism for free, but it’s based on a different electron. Both coexist in the same atom,” Davis said. So once you have Cooper pairs, it seems there’s no need to add holes to get the current flowing.

This realization may broaden the search for new superconductors that can potentially operate under warmer conditions. Such higher high-temperature superconductors would be more practical for real world, energy-saving applications such as power lines or energy storage devices.

“Instead of searching for new single-electron antiferromagnetic insulators like copper oxide to make high-temperature superconductors, maybe we should be searching for new highly magnetic, metallic materials that have properties like iron but in an orbitally selective arrangement,” Davis said. “This opens the world of materials science to many new types of materials that could be high-temperature superconductors.”

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Whoever would foster love covers over an offense, but whoever repeats the matter separates close friends.