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Definition
| The combination or arrangement of individual soil particles into peds or aggregates. |
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Term
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Definition
| A group of soil particles cohering together to form a unit. |
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Definition
| The total volume of pore space,usually expressed as a percentage of the total soil volume. |
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Term
| 3 things pore spaces are important for. |
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Definition
1) Movement of water and nutrients
2)aeration
3)Root growth |
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Definition
| The mass of dry soil per unit volume. |
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Term
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Definition
| The condition of a soil when all pores are filled with water |
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Term
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Definition
| The microbally-mediated biochemical reduction of nitrate or nitrite to gaseous nitrogen, either as molecular nitrogen or as on oxide of nitrogen |
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Term
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Definition
| The max. amount of water retained after a soil has been saturated and then allowed to drain freely |
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Term
| Permanent Wilting Point (PWP) |
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Definition
| The moisture content of a soil at which plants wilt and fail to recover when placed in a dark humid atmosphere. |
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Term
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Definition
| The amount of water held between field capacity and the permanent wilting point. (The portion of water in a soil that can be readily absorbed by plants) |
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Term
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Definition
| Germinate, produce seed and die within a year |
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Term
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Definition
| Most common, life cycle between spring and fall |
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Term
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Definition
| Germinate in fall, grow in spring and summer and die in fall (Within 12 months) |
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Term
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Definition
| Completes life cycle in 13-24 months. Vegetative grown in first year and produces seed in second year. |
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Term
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Definition
| Live for several years and can produce seeds each year |
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Term
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Definition
1) Coniferous (Evergreens)
2) Deciduous |
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Term
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Definition
| Soft, succulent stems that do not last through winter |
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Term
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Definition
| Stems which develop secondary tissue and persist for several years. |
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Term
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Definition
| Weak stems and need support. These can be woody or herbaceous plants. |
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Term
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Definition
| Plants must have short season or are hardy plants |
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Term
| Tropical/Sub-Tropical Plants |
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Definition
| Typically tender plants and can't tolerate frost or cool temperatures. |
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Term
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Definition
| require lengthy periods of daylight before they will flower and set seed |
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Term
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Definition
| Must have shorter light periods to trigger flowering and to set seed. |
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Term
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Definition
| Not affected by day length. |
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Term
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Definition
| The unconsolidated and more or less chemically weathered mineral or organic matter from which soils are developed by soil forming processes. |
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Term
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Definition
| The relative proportion of various sizes of soil particles (Sand,silt,clay) |
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Term
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Definition
| Sand, loamy sand, sandy loam soils |
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Term
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Definition
| Silts, loams, silt loam, clay loam, silty clay loam and sandy clay loam soils |
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Term
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Definition
| Include all the various clay and heavy clay textures. |
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Term
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Definition
| Unconsolidated and partly weathered mineral material accumulated by disintegration of consolidated rock in place. |
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Term
| Transported Parent Material |
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Definition
| Unconsolidated and partly weathered mineral material that has been transported by ice,wind,water or gravity from its original point of origin. |
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Term
| Fluvial Deposits (Or Alluvium) |
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Definition
| A general term for all material deposited by streams and rivers |
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Term
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Definition
| Material deposited in lake water and later exposed by lowering the lake level or by elevation of the land. |
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Term
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Definition
| Material transported and deposited by the wind, consisting of predominately silt-sized particles. |
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Term
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Definition
| A deposit of rock fragments and soil material at the base of slopes as a result of gravity. |
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Term
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Definition
| unstratified glacial sediments deposited directly by the ice and consisting of clay,sand, gravel and boulders intermingled in any proportion. |
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Term
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Definition
| causes changes in size, exposing more surface. |
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Term
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Definition
| A specialized plastid for long term starch storage |
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