RESOURCES AND DEVELOPMENT Activities and Text Questions Q.1: Identify at least two resources from each category. Ans: Biotic resources - 1. human beings‚ 2. natural vegetation. Abiotic resources - 1. water‚ 2. coal‚ 3. petroleum. Renewable resources - 1. forests‚ 2. solar energy. Non-renewable resources - 1. coal‚ 2. CNG. Individual resources - 1. land‚ 2. house. Community resources - 1. grazing grounds‚ 2. public parks. National resources - 1. minerals‚ 2. river water. International
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Chemical Fertilizers vs. Organic Fertilizers INTRODUCTION Agriculture is the most primitive occupation of the people which mainly needs land to grow different crops for food and as raw materials for different industries. Industrial use of agriculture for supplying raw materials came much later. Originally land was used for agriculture to supply food for human beings by the use of organic manures particularly animal dung. At the beginning land was used in its natural form to grow food. Land contains
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plant growth and sustainable soil management. Phosphorus nutrition can be challenging in acidic soils (e.g. Queensland) and alkaline soils (e.g. South Australia). To achieve sufficient nutrition‚ the soil needs to have a relatively high pH‚ high organic matter content‚ and moist conditions. Specific soil orders such as Vertosols‚ Kandosols‚ Sodosols‚ Rudosols‚ and Calcarosols‚ lack the requirements for phosphorus nutrition. The availability of phosphorus heavily relies on soil pH; the pH range for highest
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environmental issues. Wetlands issues Soil erosion Degraded water quality Ecosystem and uncontrolled habitants Noise Impacts Air pollutions Wetlands issues The underneath of soils stored a lot of water due to its topographic area. This issue will bring miserable and complicated during the working period. In addition‚ the duration of the project worked is increasing as the soils needs longer time to dry up and compact in the form good foundation. Soil Erosion Soil erosion will bring impacts when
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There are several different types of governments in this world. The United States run on a democracy. To have a successful democracy there needs to be a strong civil society‚ widespread education‚ active citizen participation‚ a social consensus and a favorable economy. The three most important of these five are having a favorable economy‚ widespread education and a strong civil society. The economy is an important factor of a government. Since the U.S has a government‚ like Abe Lincoln said
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piles driven side by side into the ground‚ thus forming a continuous vertical wall for the purpose of retaining an earth bank. They are commonly used for: (1) water front structures‚ (2) temporary constructions‚ (3) light weight construction where sub soil is poor for supporting a retaining wall. A sheet pile may be of three types: Cantilever sheet piling Anchored sheet piling Braced sheeting Cellular cofferdams The design of sheet pile retaining walls requires several successive operations:
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the uptake of nutrients such as P‚ N‚ K‚ Cu‚ Zn and Ca by plants especially in soils low in these nutrients. Since P is the most limiting nutrient in tropical soils‚ mycorrhizas are vital for improving P nutrition particularly for cultivated plants. External hyphae can absorb and translocate P to the host from soil outside the root depletion zone. The thin mycorrhizal hyphae (2-4 μm in diameter) are able to penetrate soil pores not accessible to the root hairs which are about five times larger than
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Some of the major effects of deforestation include biodiversity loss‚ local climate change and global warming. Farmers often have trouble raising crops‚ which typically results in more problems‚ such as an increase in food prices. Soil erosion and cultural displacement also can occur. Those who want to address the problem have a variety of options‚ however. Biodiversity Loss A loss of biodiversity often follows a reduction in the amount of forested land. Trees‚ shrubs and other plants provide shelter
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melts‚ it can flood land and move the soil. Even something as small as an earthworm can cause erosion. Earthworms and other insects that burrow in the ground make tunnels in soil and reform it. Humans also greatly contribute to erosion. Because of humans‚ the Earth has gone through millions of years of farming‚ cutting down trees‚ and the development of architecture. Humans drastically changed the earth so much‚ that every year one million acres of top soil
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MINISTRY OF EDUCATION REPUBLIC OF TRINIDAD AND TOBAGO PRIMARY SCHOOL SYLLABUS AGRICULTURAL SCIENCE CURRICULUM [*October 2001] TABLE OF CONTENTS Introduction Goals of The Agricultural Science Curriculum for Primary Schools Summary of The Curriculum Infant Year One Profile Term II ……………………………………………………………. Infant Year One …………………………………………………………………………………… Infant Year Two…………………………………………………………………………………… Standard One Profile Term II …………………………………………………………………… Standard One ………………………………………………………………………………………
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