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AR Plant Sci U5
AR Plant Science Unit 5
| Question | Answer |
|---|---|
| water held between soil particles against the force of gravity | capillary water |
| the smallest of inorganic particles in the soil | clay |
| the most basic form of matter which maintains the characteristics of the substance | elements |
| water that drains out of the soil after it has been wetted | free water |
| any material added to the soil to provide nutrients | fertilizer |
| percentage of nutrients in fertilizer | fertilizer analysis |
| water pulled downward in the soil by gravity | gravitational water |
| water that forms a thin film around soil particles and is not available to plants | hygroscopic water |
| the artificial application of water to plants | irrigation |
| substance that is added to soil, used to raise pH | lime |
| the nutrients needed by plants in the largest amounts; such as nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur | macronutrient |
| the nutrients needed by plants in small amounts; such as boron, copper, chlorine, iron, manganese, molybdenum, nickel, and zinc | micronutrient |
| decayed or partially decayed remains of plants and animals found in the soil | organic matter |
| the measure of acidity or alkalinity of the soil | pH |
| space between soil particles | pore space |
| the largest of the soil particles | sand |
| the middle sized of the soil particles | silt |
| the ability of soil to provide nutrients for plant growth | soil fertility |
| a cross section of the soil, usually 3 to 4 feet deep | soil profile |
| the process of preventing growth of plants in a soil | soil sterilization |
| the way soil particles are arranged | soil structure |
| the amount of sand, silt, and clay in soil | soil texture |
| the layer of soil below the topsoil | subsoil |
| the layer of soil found on the surface | topsoil |