Crop efficiency in utilizing available nutrients is an important factor in increasing produc-tivity and reducing the environmental impact of agriculture. Nitrogen is the nutrient that plants need in the largest quantity and wheat, along with maize and rice, is the world's most cultivated crop. In this work, the Nitrogen Use Efficiency, NUE, during the major growth period, HTP, of twelve different spring wheat varieties, were examined. The NUE was calculated as the product of uptake efficiency of nitrogen, UN, and the conversion effi-ciency of nitrogen to biomass, EN. The purpose of this work was to find if there are varietal differences in NUE and its components among the twelve varieties and to link a high NUE to specific characteristics of the varieties.

Åmotfors Bruk AB (ÅBAB) has today an inefficient production of steam for the manufacturing of paper. Unpredictable energy prices and modernisation of the current equipment has been the underlying factors to invest in a thermal power plant, mainly driven by garbage. This facility will not only use the steam for paper production, it will also generate electricity through a steam turbine. Today, when a fault on the supplying line occurs which leads to disconnection of the external grid, all the support of electricity to Åmotfors Bruk (ÅB) will disappear. This will lead to major interruptions in the paper production, which will cause severe economical losses.

The landscape with its associated historical tracks and remains are an important part of our cultural heritage that we consider important to conserve. The stone walls are an example of historical remains that helps to build up this cultural heritage. It is a landscape element that today usually is being associated with the old cultivated landscape, where they mainly functioned as boundary markings and fences. Today, the stone wall is a valuable element in the landscape with ecological, culture-historical and aesthetic values. Since the stone walls arose as elements in the landscape a lot has been changed within the agriculture.

As a company it is required to work with strategies to minimize costs such as packaging and logistic costs. The increased market of industrial produced wooden buildings results that the time and the cost which the packaging of prefabricated building elements consume, is experienced to be in greater need of development than before and demands a better solution. The aim with this dissertation was to discover how the development of the handling of the packaging can improve the packaging process. The goal was to present improvement proposals for a simplified and thereby a more efficient production in time and cost perspective.The packaging process which includes packaging, handling, storage and transport were studied. Interviews were made with participants from the market for manufacturers of wooden houses and a case study was made at the company A-hus.

On board ships different type of maintenance activities take place. Some of those require working with vibrating handheld tools. Traditionally there is a high awareness of the risks with different type of duties such as protecting the skin from oil or other chemicals, the eyes from splashes and hearing from high noise levels. The experience we have from our time as on-board cadets are that there is less information about vibration hazards available compared to the information concerning other hazards on board.There are threshold values that workers, by law, are not allowed to exceed when working with handheld vibrating tools. The purpose of this study is to investigate how common the use of this type of equipment that can cause damage by vibrations, to the hands and arm amongst the deck crew, and if the crew informed about the risks involved.

A manufacturing machine at the engineering company Sandvik Coromant has a positioning table which task is to move an item linearly. The positioning table has a linear motor capable of high velocity and acceleration. This makes it possible to achieve short cycle times and a more profitable production.The purpose of this thesis is to bring forward a new concept which is more adapted to the requirements of the positioning table. The reason is that the current positioning table provides an unnecessarily positioning accuracy of 0.01 mm, while the requirement for the positioning accuracy is just 0.1 mm. The goal is to reduce manufacturing and component costs.To develop a suitable solution an approach for the concept development process has been performed.

Improved profitability, a reasonable yearly income or the possibility to have employees are all incentives for expansion. A prerequisite for farm businesses to expand is for land to be made available, either to buy or to rent. In Sweden, 43 % of the total arable land is leasehold land, which implies that a functioning leasehold market is of great importance for the Swedish agriculture. Several factors can affect the supply of leasehold land, for instance the leasehold legislation and the Single Payment Scheme. The fact that the leasehold legislation is compulsory, in protection of the leaseholder, might keep land owners from leasing their land out.

Examensarbetet har genomförts på den produktionstekniska avdelningen på Volvo Construction Equipment i Hallsberg.Syftet varatt ta fram ett nytt koncept för hyttsvetsproduktionen på fabriken;hur produktionsprocessen skulle kunna se ut i framtiden. Man vill göra flödet i linan mer effektivt med avseende på kvalitet, flexibilitet samt eliminera tidsslöseri som idag är ett problem.När fabriken påbörjade sin produktionproducerade man två olika varianter av hyttertill anläggningsmaskiner, idag har man ökat produktionen till fyra varianter. I takt med att varianter samt orderingång ökat har man byggt på befintlig produktionslina istället för att utveckla en ny, anpassadlinafördet nya läget. Resultatet har blivit att maxkapaciteten är nådd och linan klarar inte att hantera en planerad produktionsökning.En grundlig analys av hyttsvetsprocessen, innehållande intervjuer med bland andra platschef, teknisk chef och flera tekniker genfördes för att få förståelse för processen. Övrig information såsom effektivitetsmätningar på utrustning, värdeflödesanalyser och avvikelserapportering har funnits tillgängligt och legat till grund för arbetet.

The importance of chemical use is enormous for areas such as agriculture, industry and medicine and hence a prerequisite for our modern society. In order to protect humans and the environment from the negative effects of chemical use, chemical regulations have been used at a relatively early stage in our history. The purpose of REACH, the new chemical regulation of the European Union, is to generate new knowledge of chemicals within the European market and to increase the responsibilities of the enterprises when it comes to risk management. Whether the enterprises will implement the regulations or not will be of vital importance for the realization of the law?s intentions.The purpose of this study was to identify possibilities and problems that can occur when a downstream-user SME is about to implement REACH.

Gunsta is situated about 10 km east of Uppsala. Today there are plans to establish 1000 new households in Gunsta before year 2030. The required energy for heating houses and water would be distributed via a district heating system, which also includes 200 existing residences. The annual required energy, according to this study, would be 16.2 GWh with a maximal peak effect of 6.9 MW. To meet this need, the study suggests a system with heat pumps to upgrade the 31?C water from a 1.8 kilometre deep borehole.

In 2012, about 1.3 million boars were surgically castrated, most of them without anaesthesia. Castration is performed to avoid the occurrence of boar taint and aggressive and sexual behaviour. There is a growing concern about the welfare of the piglets and the Swedish Board of Agriculture is working to find efficient and functional alternatives to castration without anaesthesia. The aim of this study was to obtain an overall picture of the latest research about the alternatives to castration without anaesthesia, with focus on vaccination against boar taint, and how they affect the welfare of the pigs. The alternative methods that are available today are surgical castration with anaesthesia and/or analgesia, rearing entire males and vaccination against boar taint.

We have chosen to write our examination essay about Ukraine, we wanted to find out what kind of possibilities there is to run a farm there, and also find out what kind of problems that might arise. Ukraine is still heavily influenced by Russia and the legacy from the former Soviet Union. The agriculture today looks pretty much like it did before the collapse of the Soviet system. There are large governmental or cooperatively owned farms. The large farms have to deal with bad cash-liquidity and they often have trouble getting a hold of seed and artificial manure to their whole acreage.

An increasing number of chemicals are being transported by ships along the Swedish coastline. Many of these chemicals may pose a threat to the environment. Accidents and spills are luckily rare, but nonetheless it is important to be prepared for a possible chemical spill. The Swedish Coast Guard is responsible for responding to chemical spills at sea, and has both equipment and trained personnel for the purpose. In order to prepare for a possible accident one also needs to know what is currently being transported at sea.

The agriculture is today in a development that leads to bigger and bigger units in the primary production. To be able to follow this development many companies chooses to cooperate in different ways. The most radical change is when farmers fuses with other farmers and merge into to a big collectively owned operation firm. The reason behind this idea is that the firms achieve the big companies advantages by being complement to each other. The purpose of this essay is to make an economic analysis of two crop production companies who works together in an operation firm.

The purpose of this thesis is to identify the factors that drive efficiency and effectiveness in technical development projects performed at A?F?s department of product development. In addition to identifying and analyzing these factors, the thesis also analyzes what needs to be taken in to account in order to implement a measurement system that is able to both monitor and control the identified factors.The thesis has been performed in a qualitative manner. It is based on interviews with people from several different technological companies, within different lines of business, all of which are customers to A?F?s department of product development.The results show that there are seven critical factors for project efficiency and effectiveness.