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Weed Management Handbook Summarized by: Student X Introduction • What is a weed? • Disadvantages and advantages • Seed bank • Different ways to deal with weeds • Resistance of herbicides What is a weed? • Older definitions: -a plant not valued for its use or beauty -a plant whose virtues have yet to be discovered • Modern definitions: -plants that are considered undesirable by producers -unwanted plant which in some way hinders or interfers with human activity. (Crops may at some point also be weeds) Weed disadvantages • Reduces crop yield – weeds and crops have to share resources such as light, water and nutrients • Reduces crop quality and health – increases moisture and disease levels • Delay harvesting – conservation of moisture may delay ripening Beneficial effects of weeds • Valuable indicators • Help against erosion • Many weeds are used as herbs for flavouring • Some wee
Margit Tepner k0848752 Sustainability aspects of biofuels 1. Introduction The literature review will discuss the sustainability aspects of biofuels. Food production will be the main concern as it is the most debated issue, but other aspects, such as land use change and water consumption will be also considered as they are essential aspects in the biofuels sustainability criteria. The review will discuss the viability of biofuels based on the current technologies. Second-generation biofuels are not yet commercially viable and therefore will not be discussed; although they could significantly improve the sustainability of biofuels when they break through to the industrial scale. 2. The scale of biofuels production 2.1. Drivers of biofuels production Lal (2010) stated that "three inter-connected challenges face humankind in the 21st century": food security, climate change, and energy security. The world population is projected to reach 9 billion in 205
Extended Essay Research Question: To What Extent Does a Plant Based Diet Lower the Risk of Coronary Artery Disease? Subject: Biology Word Count: 3482 Abstract: Because there has been much debate over whether plant based diets are beneficial or not, I’m willing to learn more about it and since there’s eligible data available on the effects of vegetarian/vegan diets on cardiovascular diseases, my research question is formed
SISUKORD ENERGY STORY................................................................................................................4 USES OF ENERGY............................................................................................................. 4 2.1 Uses of energy in homes...............................................................................................5 2.2 Types of energy used in homes.................................................................................... 6 2.3 Energy use in different types of homes........................................................................ 6 2.4 Commercial Energy Use...............................................................................................9 2.5 Industrial and Manufacturing Energy Use..................................................................11 2.6 Transportation Energy Use.........................................................................................12 RENE
is seen everywhere. These can be found beside rivers and dry riverbeds. Some gum trees are valuable timber species and have been cut down for many years. Gum tree leaves are full of oils, which evaporate easily. That why the Blue Mountains are called like that, because the evaporateing eucalypt oils, which make the air blue. Another big family of native plants is acacias. They are also known as wattles. There are about 900 species of wattles. The golden wattle is Australia's native flower. Its gold flowers and green leaves have inspired the colours worn by many Australian sporting teams. In Australia bushfires are very often to happen. Because the trees and shrubs do not lose their leaves in winter, but grow throughout the year. But when the dry leaves and branches fall down, then there is a lot of dry material and theat helps busfires to burn. Animals Scientists estimate that the continent is home to more that one million animal and plant species
Water pollution Attention for water pollution exploded in the 1980s. The oil spill of the Exxon Valdez showed many around the world just how horrible the effects of water pollution could be. However, even the Exxon Valdez spill barely touched the surface of the problem of water pollution. The ship spilt only 5% of the oil spilt that year, and oil is just one of many pollutants that people dump into the water every year. Every year, 14 billions pounds of sewage, sludge, and garbage are dumped into the world's oceans. 19 trillion gallons of waste also enter the water annually. The problem of ocean pollution affects every nation around the world. This is especially true because water is able to transport pollution from one location to another. For many years, chemicals were dumped into bodies of water without concern. While many countries have now banned such behavior, it continues to go on today. As the world has industrialized and its population has grown, the problem of water poll
climbing, fishing, hunting or skiing. The only big city in the Rockies is Denver. Lakes The Great Lakes are a group of five large lakes in North America. They are the largest group of fresh water lakes on Earth. They are sometimes called the inland seas. There are: 1. Lake Superior (the largest and deepest) 2. Lake Michigan (the only one entirely in USA) 3. Lake Huron 4. Lake Erie (smallest and most shallow) 5. Lake Ontario (much lower elevation than the rest). The Great Lakes between the USA and Canada are joined together by rivers and canals. The lakes are connected to the Atlantic Ocean by the St. Lawrence River and to the Hudson River by a canal. Between Lake Ontario and Lake Erie is Niagara Falls (51 m). Another large lake in the USA is Great Salt Lake. It is saltier than the sea. Rivers The Mississippi river is the major river of North America and the United States. It flows from
Native Americans. ¤ over 500 nations/tribes ¤ closeness to nature ¤ europeans came for the free land ¤ less civilized ¤ they lived in teepee's ¤ they hunted buffalos for food, clothing BERENGIA- Land Bridge connecting Asia (Siberia) to Alaska 1500 km wide North to South 65 000 B.P (before the present) rised out of the sea to 40 000 B.P a wave when people came from west. 36 000-32 000 B.P arrived people CHEROKEE. Southeast U.S- their heartland, not on the ocean. Lanuage + customs + weapons-> related to IROQUIS family of nations (Iroquis lived around Great Lakes) 1300 A.D. established in South East U.S Classical Cherokee Civilization 16th-19th centuries MATERINEAL-(,,mother line") women controlled home, family, children, inheritana, clan membership. Men hunted and made babies. Cherokee Wedding Ceremony- ¤groom brings meat(,,hunter") ¤ bride brings other food (grains, berries etc.) -> prooves that she's ,,homemaker" They step on the Ceremonial Blanket-> family. A girl got her n
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