| A | B |
|---|
| ions | electrically charged particles |
| deficiency | a condition where there is less of a nurtient than the amount needed |
| cations | positively charged ions |
| anions | negatively charged particles |
| aspect | the direction in which the land is facing |
| aerobic | conditions in which there is plenty of oxygen |
| anaerobic | conditions in which there is no or very little oxygen |
| nutrient avaliability | how much of a nutrient is avaliable for plants to obtain |
| trace elements | nutrients needed by plants in very small amounts |
| micronutrients | nutrients needed by plants in very small amounts |
| macronutrients | nutrients needed by plants in large amounts |
| superphosphate | a popular artificial fertiliser containing Ca, P, S |
| C, H, O | the macronutrients that plants can obtain fromthe air of from pure water |
| urea | an artificial fertiliser containing 46% nitrogen |
| N, P, K, S, Ca, Mg | the macronutrients that plants obtain from the soil |
| NPK(s) rating | a system to show the percentages of nitrogen phosphorus and potassium and sulphur in a fertiliser |
| fluctuation | anything you can measure that increases and decreases and so on |
| transpiration | when plants absorb water from the roots then transport to the leaves then evaporates |
| photosynthesis | the process in plants in which they use the energy in sunlight carbon dioxide from the air and water from the soil to make carbohydrate food |
| saturated | containing as much water as possible |
| permanent wilting point | condition where a soil has dried so much that the remaining water is not avaliable to plants roots |
| field capacity | the condition that exists when a saturated soil is allowed to drain freely for fourty eight hours |
| impervious | a condition in which a substance does not allow other substances to pass through it |
| water table | the depth below which a soil is saturated |
| nitrification | the process by which nitrogen in organic matter is converted through urea and ammonium compounds to the nitrates that plants can absorb |
| potassium | the plant macronutrient that promotes the development of fruits and flowers |
| nitrogen | the plant macronutrient that promotes leaf growth |
| phosphorus | the plant macronutrient that promotes root growth |
| denitrification | the process by which some bacteria break down nitrates in the soil into nitrogen gas which then escapes from the soil |
| legume | any plant in the bean family(such as beans, clovers,peas, kowhai, gorse and broom) |
