EFFECTS OF NITROGEN FIXING PEA PLANTS (Pisum sativum) ON GROWTH OF CORN (Zea mays) Introduction Interactions among plant species‚ particularly negative ones‚ have been a concern in agriculture (Levene 1926‚ Russell 1961). Novoa (1981) suggested that it would be advantageous to rotate certain crops by season‚ grow certain crops together‚ or avoid growing certain crops on the same land. Observations indicated that some crops require specific types of nutrients in contrast to other crop
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[pic] THE IMPACT OF SCIENCE IN HUMAN LIFE The word science comes from the Latin word “scientia” which means “knowledge”. [pic] It is a broad field of human knowledge concentrated with facts which are logically explained by rules‚ regulations and principals. The word science always lives with us. The people who study science are known as “scientists”. They perform chemical reaction and invent different objects which help us to make our life easier
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questionnaire checklist that can be used to evaluate controls for each of the four basic activities in the revenue cycle (sales order entry‚ shipping‚ billing‚ and cash collections). Required * a.For each control issue‚ write a Yes/No question such that a “No” answer represents a control weakness. For example‚ one question might be‚ “Are customer credit limits set and modified by a credit manager with no sales responsibility?” * b.For each Yes/No question‚ write a brief explanation of why a “No”
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plant a tree. It seems like such a simple and menial task. But the truth is; every tree makes a difference. One of the great functions each tree offers‚ besides its aesthetic addition‚ is the sequestering of CO2‚ carbon dioxide. To elaborate this importance‚ it is fair to paint the big picture. Heat is trapped in the earth’s atmosphere due to high levels of carbon dioxide (CO2) and other heat trapping gases which ultimately prohibit the heat from being released into space. This is what has caused
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Unit 4: Carbon Nanostructures Carbon Structures: • Carbon contains six electrons with electronic structure: (1s2)‚ (2s)‚ (2px)‚ (2py)‚ (2pz). Outer s orbital together with three p orbitals form the chemical bonds of carbon with other atoms. • Conventionally‚ solid carbon has two main structures called allotropic forms: diamond and graphite: - Diamond is tetrahedrally bonded through sp3 hybrid bonds that form a 3D network. - Graphite has a layered structure with each layer called graphene formed
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Carbon Footprint Essay Criteria | Points | Score | First paragraph: What is a Carbon Footprint? | 1 | | Second paragraph: What was your Carbon Footprint? | 1 | | Third paragraph: What can YOU do to improve your Carbon Footprint and reduce your Carbon Dioxide emissions? | 1 | | Essay is neatly written with correct sentence structure‚ spelling‚ and punctuation. | 1 | | Total | | | Carbon Footprint Essay Criteria | Points | Score | First paragraph: What is a Carbon Footprint
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Carbon steel is steel in which the main interstitial alloying constituent is carbon in the range of 0.12–2.0%. The American Iron and Steel Institute(AISI) defines carbon steel as the following: "Steel is considered to be carbon steel when no minimum content is specified or required for chromium‚cobalt‚ molybdenum‚ nickel‚ niobium‚ titanium‚ tungsten‚ vanadium or zirconium‚ or any other element to be added to obtain a desired alloying effect; when the specified minimum for copper does not exceed 0
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Nutrient Cycle Questions: 1. What ’spheres’ are involved in nutrient cycling? The atmosphere‚ the lithosphere‚ the biosphere and the hydrosphere. 2. What is the law of conservation of matter or mass? That matter can neither be created nor destroyed and that nature is essentially a closed system. 3. Why does it matter that nature is basically a ’closed system’? It matters because since all the elements we rely on to support life on the planet are here and have been here and there isn’t
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important‚ this being carbon. There are many interesting things about carbon including‚ facts about it‚ its history‚ and what it is used for. Carbon is a very important element‚ in fact‚ life could not exist without it. Carbon (C on the periodic table) is a chemical element and is the sixth most abundant element in the world. Carbon is the 6th element on the periodic table in group 14‚ period 6‚ it has six protons‚ six electrons‚ and six neutrons‚ with an atomic mass of 12.01u. Carbon has a boiling point
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Gravimetric Determination of Phosphorus in Fertilizer Samples ------------------------------------------------- Results and Discussion More than 50% of fertilizers are composed of nitrogen‚ phosphorus and potassium because these three nutrients are essential but are deficient in soils. To ensure good quality of fertilizers‚ it is significant that the amounts of these nutrients are quantified. In this light‚ gravimetric principles are of much use. The objective of the experiment is to determine
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