| A | B |
|---|
| aeration | exchange of gasses in media, roots take up oxygen from soil pores |
| fertilizer | material (salts) that provide nutrients to plants |
| growing medium | material in which plants are grown (non-soil) |
| macronuturient | elements (nutrients) that are needed in large amounts |
| micronutrient | elements (nutrients) that are needed in small amounts |
| organic matter | decayed plants and animals found in media |
| plant nutrition | the absorption of nutrients by plant |
| slow release fertilizers | fertilizers that continuously discharge a small amount of nutrients over a period of time |
| adhesion | binding of dissimilar particles (water to soil) |
| cohesion | binding of similar particles (water to water) |
| clay | smallest particle of field soil |
| silt | medium sized particle of field soil |
| sand | largest particle of field soil |
| soilless media | soil media with no actual mineral soil (clay, silt, sand) |
| water holding capacity | ability of soil to hold water for plant use |
| fertilizer injector system | equipment that injects exact amounts of fertilizer into water supply` |
| ph | measure of acidity or alkalinity (base) |
| available water | water that can be absorbed by plant roots |
