Agriscience CDE Already Rated A

Agriscience CDE Already Rated A Greenhouses that are near natural hot water springs can use the springs as a heat source. True It the retail market, "hothouse" vegetables command higher prices than field production vegetables. True Greenhouses use soil as their only growing medium for plants. False Over time, hydroponics has become a less important mode of producing vegetables and other high income plants. False Perlite is used extensively for starting new plants because it holds little water. False Soils vary in temperature, organic matter, and the amount of air and water they contain. True What is the top layer of the Earth's surface? Soil Much of the original work of soil mapping was completed by the: Soil Conservation Service Soil formed in place from parent materials are considered: Residual A properly limed and fertilized forage crop is the backbone of a successful crop: Rotation The maximum number of capability classes on a soils map is: Eight Soil capability subclasses are designated by: e, w, s, c What soil component is derived from such nonliving sources such as rock material? Mineral Matter The term for the proportion and size of soil particles is: Texture A cross-sectional view of soil provides a soil: Profile What does 7 represent on the pH scale? Neutral What is the proper growing environment for "hothouse" vegetables? Controlled Greenhouse Peat moss consists of partially decomposed mosses that have accumulated in waterlogged areas called: Bogs Horse manure mixed with straw is used extensively as a medium for growing: Mushrooms Without soil microbes, organic materials would not: Decay The process of growing plants without soil. Hydroponics Soil groups within the subclasses. Capability Units The process by which water soaks into and moves through the soil. Percolation What is needed to raise the pH in acidic soils? Lime Plants in which certain bacteria use nitrogen gas from the air and convert it to nitrate. Legumes A mixture of partially decayed organic matter such as leaves, manure, and household plant wastes. Compost Soils are usually leached and acidic in what areas? High Rainfall The relative sizes of soil particles, from smallest to largest, are clay, silt, and: Sand What is neutral on the pH scale? 7 The tool used to collect a uniform volume of soil is called a soil: Auger What ingredient could be added to the soil to lower the pH value? Sulfur Fluorides are damaging to crops. True Not only does acid rain damage and kill trees and other plants, it also has a corrosive effect on metals. True Nitrous oxides constitute about 50% of pollutants in automobile exhaust. False Chlorofluorocarbons are highly unstable. False Radon moves up through the soil and flows up into the atmosphere at high and usually harmful rates. False Photosynthesis is the process by which energy from the sun is stored in molecules of: Sugar The area or type of environment in which an organism or biological population normally lives is the: Habitat For human survival, approximately what percentage of the air must be oxygen? 21% A pale yellow element occurring widely in nature is: Sulfur What is a colorless, radioactive gas formed by the decay of radium? Radon Chlorofluorocarbons are a group of compounds consisting of: Chlorine, fluorine, carbon, and hydrogen Chlorofluorocarbons are used as: Aerosol Propellants Plants create oxygen through what process? Photosynthesis What heat and friction-resistant material once was used extensively in vehicle brakes and clutch linings, shingles, and water pipe insulation? Asbestos Plant pathologists need an awareness in air quality to: Watch for airborne disease organisms. What is the most abundant element in the air? Nitrogen