(
课件网) Chemical Or Organic Farming First, buy or select the seeds from the store. Second, we need to plow（犁田） or turn over the soil. Third , we sow the seeds in the soil. Finally, we can harvest our grain. fertilize the soil to increase production of the crops fertilizer fertilizer How many kinds of fertilizers do you know chemical fertilizers natural fertilizers chemical farming organic farming chemical fertilizers natural fertilizers Better？ Reading Chemical Or Organic Farming Part 2 Part 1 Para 1. Para 2. Para 3. Para 4. Long-term use of_____ fertilizers can cause damage to_____. Skim the text, try to get the main idea of each paragraph Farmers and customers turn to_____. _____ caused by chemical fertilizers. Other methods to keep_____. chemical the land and people’s health Problems organic farming the soil fertile http://www.ppthi- . Questions 1. Why are chemical fertilizers so popular in farming today 2. What is organic farming Because they are a great way to stop crop disease and increase production. Organic farming is farming without using any chemicals. Read Part 1, try to find the problems and causes of chemical farming, then fill the blanks. Problems Causes Chemical farming damage_____ affect _____, _____ and _____. lead to _____ and _____. fruit, vegetables and other food have less _____. by killing _____ _____ by staying in the ground and underground water by building up_____ _____ by growing too fast the land crops animals humans cancer other illness nutrition the helpful bacteria and pests as well as harmful ones. in people’s bodies over time Read Part 2, try to find the methods and advantages of organic farming as well as the way to keep the soil fertile, then fill the blanks. Organic farming Methods use natural waste ____ _____ make the soil_____ _____ change _____ _____ put _____ back into _____, making _____ _____ plant different _____ with different lengths of _____ Use different levels of soil plant _____ and then leave it _____ _____ prevent wind or water from carrying away the soil and become a natural fertilizer richer in minerals and so more fertile from animals as fertilizer the kind of crop in each field every few years important minerals the soil it ready for other crops crops roots grass between crops in the ground Advantages The methods to keep the soil fertile： using natural waste from animals as fertilizer. changing the kind of crop in each field . planting crops to use different levels of soil. planting grass between crops to prevent … The same goal : _____ _____ _____ to grow good food and avoid damaging the environment or people’s health. 1 2 3 4 In recent days, scientists have discovered that using_____ fertilizers for a long time can _____ the land and also people's health. There are several _____ caused by chemical fertilizers. They damage the land, stay in the water for a long time which can_____ in people’s bodies and _____ many illnesses. ... ...
