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© Boardworks Ltd 2004 1 of 9 This icon indicates that detailed teacher’s notes are available in the Notes Page. To use this presentation click on View, Slide Show. This icon indicates the slide contains activities created in Flash. These activities are not editable. Environmental Impacts of Farming
© Boardworks Ltd 2004 1 of 9 Habitat losses in the UK since 1949 95% of lowland grassland 40% of lowland heaths on acid soils 30-50% of ancient lowland woods Some 140,000 miles of hedgerow removed by 1974 Farming – habitat loss
© Boardworks Ltd 2004 1 of 9 Farming – hedgerows Why are hedgerows important? They provide a habitat (home) for animals and birds. They reduce soil erosion. They act as a windshield which helps stop the wind blowing away the topsoil. The roots of the hedgerow bind the soil together.
© Boardworks Ltd 2004 1 of 9 How has food production been increased? 2.5 million tonnes of artificial fertilizers and pesticides are used every year globally. The use of mineral fertilizers and pesticides have vastly increased global agricultural yields.
© Boardworks Ltd 2004 1 of 9 Fertilizers and pesticides But what are artificial (or mineral) fertilizers? Fertilizers generally encourage plant growth. They come in salt form, which is easily soluble in water, or in liquid form. This is important as then the plant will be able to absorb the weak solution of fertilizer. Prepared fertilizers are balanced to contain all the elements necessary for the type of plant for which they are designed. However, different plants need different fertilizers. For example, a plant grown mainly for its leaves will use a fertilizer more heavily concentrated in nitrogen.
© Boardworks Ltd 2004 1 of 9 Fertilizers and pesticides But what are pesticides? A pesticide is any substance or mixture of substances intended to prevent, destroy or repel a pest. The pests you want to control could be insects, mice and other animals, unwanted plants (weeds), fungi or micro- organisms (bacteria or viruses). Insecticides kill insects while fungicides kill fungi (mildews, molds, and rusts).
© Boardworks Ltd 2004 1 of 9 Producing artificial fertilizers uses fossil fuels. Energy is also used by the machinery spraying the pesticides. Today, it now takes about 1.2 barrels of oil to produce a single ton of grain in more developed countries. This is some 7 times greater than in 1950! Problems of using artificial fertilizers and pesticides So if using artificial fertilizers and pesticides increases crop yields, why shouldn’t we use more of them?
© Boardworks Ltd 2004 1 of 9 Problems of using artificial fertilizers and pesticides An overuse of these fertilizers and pesticides can result in them being washed into rivers and lakes causing eutrophication. These chemicals can also end up in our water supply. It costs Britain £121 million each year to monitor and remove pesticides from the water supply. In Germany a water company has found it cheaper to pay farmers to go organic than clean pesticide from the water supply.
© Boardworks Ltd 2004 1 of 9 Eutrophication
© Boardworks Ltd of 18 These icons indicate that teacher’s notes or useful web addresses are available in the Notes Page. This icon indicates the.
1 of 13© Boardworks Ltd 2008 Plants and photosynthesis.
© Boardworks Ltd of 17 These icons indicate that teacher’s notes or useful web addresses are available in the Notes Page. This icon indicates the.
Water Pollution Fertilizers and Pesticides. Fertilizers materials used to provide plant nutrients which are deficient in soils. contain essential ingridients.
© Boardworks Ltd of 8 This icon indicates that the slide contains activities created in Flash. These activities are not editable. For more detailed.
© Boardworks Ltd of 20 © Boardworks Ltd of 24 KS3 Biology 9D Plants for Food.
Nitrogen is very important for all plant life! Animals eat plants. When plants and animals die, they decompose (rot) and the nitrogen returns to the.
2.2 ASSESSING THE IMPACT OF HUMAN ACTIVITIES ON ECOSYSTEMS (1) pp
The Influence of Human Activity on the Environment More free powerpoints at
Ecology of Populations. What is Ecology? “Ecology” the study of the interactions of organisms w/ its environment.
Learning outcomes Success criteria Students should understand the following Why fertilisers are needed in agricultural systems. How do natural and artificial.
Biology 1b Evolution and Environment GCSE CORE Key words: sustainable, recycle, alternatives.
In simplest terms, agriculture Is an effort by man to move Beyond the limits set by nature.
Fertiliser Definition A substance, often an artificial chemical mixture, that is spread on soil to make it more fertile. They provide one or more essential.
The Biosphere Sub topic (c) Control and Management Name Teacher.
Feeding the World Chapter 14 Feeding the World Chapter 14.
Disappearing Resources Are we running out of time?
Environmental Problems With Food Production Ch. 12.
The Influence of Human Activity on the Environment.
© Boardworks Ltd of 4 This icon indicates that detailed teacher’s notes are available in the Notes Page. To use this presentation click on View,
Environmental Science Chapter 15 Review Arable land – able to grow crops Soil formation –involves bedrock decomposition Topsoil – upper layer of soil -
HUMAN IMPACT ON LAND BY: MR. MERINGOLO. WHY IS LAND SO IMPORTANT? SUPPLIES A SOLID SURFACE FOR BUILDINGS AND ROADS THE SOIL IN LAND PROVIDES NUTRIENTS.
Environmental Aspects of Food Production page 13.0.
Environmental Studies Dr Anupam Agarwal. Composition of Soil: Soils are a mixture of different things; rocks, minerals, and dead, decaying plants and.
FARMING Science Project: Ja,Jin,Noonn. genetically modified organism A GMO is a genetically modified organism (also called "genetically engineered")
Plants, photosynthesis and respiration Name _____________________.
Plant Nutrients Minerals N-P-K + Ca-Mg-S + Fe-Cu-B-Mn Plants use carbon dioxide + sunlight to make sugar for energy. This happens in their leaves.
Problems Caused By Agriculture In MEDC’s. The Common Agricultural Policy The Common Agricultural Policy, whilst guaranteeing to farmers that there would.
Environmental Science Chapter 9 Notes #2. Agriculture and Soil Arable Land – Arable Land – Fertile land that can grow crops wellFertile land that can.
Integrated Pest Management (IPM) Chapter 14. Agricultural Methods 1.Slash and Burn – Clear small area – Burn trees and brush releases nutrients – Farm.
Crops and Soil Environmental Science Chapter 15 Section 1.
Leaching: Downward movement of minerals and nutrients in the soil Lots of Rain Lots of Leaching Bad soil for farming Moderate Rain Moderate Leaching.
14.2 Fertilizer and Agriculture Approximately 25% of the world’s agriculture crop is directly attributed to chemical fertilizer use. – Fertilizers replace.
Water PollutionThirsty?. What type of pollution?
Water PollutionThirsty?. Water Pollution is the addition of any substance that has a negative effect on water or the living things that depend on water.
Agribusiness and environmental impacts Lesson Aims: To find out what we mean by agribusiness. To find out the impacts that it can have on the environment.
2 Land and water pollution p.266. Objectives Students should learn: that more waste is being produced which may pollute water with sewage, fertilisers.
Using Plants Sustainably. Sustainable Agriculture in Canada The two main agricultural practices used by Canadian farmers to increase crop yields are the.
1. Why is water important? Water shapes Earth’s surface and affects Earth’s weather and climates. Water needed for life. Living things are made up of.
How Much Soil is There? 75% of earth is covered by water Only 10% of the earth’s land surface is land able to grow crops (=ARABLE LAND) – Why? Desert,
After completing this topic you should be able to : State that the increasing world population has led to a need for more efficient food production. State.
Human Impact on the Environment. 1. Monoculture/Intensive Farming Humans have managed to: remove the threat of predation develop vast areas of land for.
Agricultural Ecosystems 5.4. Learning Objectives All students should know: What is an agricultural ecosystem. How natural and agricultural ecosystems.
Pesticides Any substance or mixture of substances designed to prevent, destroy, repel, or limit pests – Weeds – Insects – Diseases – Plant damaging organisms.
Unit 9C and 9D Lesson 7 Weeds and Pests Objective: to learn how we prevent weeds and other pests destroying farmers crops. To learn some of the problems.
1 of 46© Boardworks Ltd of 46© Boardworks Ltd 2007 Throughout an ecosystem, energy is constantly lost by wasted heat. In contrast, nutrients are.
2.2 – Assessing the Impact of Human Activities on Ecosystems Pollution, Soil and Water.
Intermediate 1 Unit 3a & b Photosynthesis, Respiration & Fertilisers
Need for awareness and understanding Human activities can create ecological problems that must be avoided or corrected. People need to understand the.
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