Term
|
Definition
|
|
Term
|
Definition
pH electrodes
colored dyes |
|
|
Term
| sources of natural acidity |
|
Definition
weathering of soil minerals
breakdown of soil OM
rain |
|
|
Term
Anthropogenic(human origin) sources
soil acidity |
|
Definition
application of ammoniacal fertilizers
acidic precipitation |
|
|
Term
| major problems with acidic soils? |
|
Definition
aluminium toxicity(5.7 pH)
calcium and magnesium defeciences
molybdenum deficiency
manganese toxicity (less 5 pH) |
|
|
Term
| major problems with basic soils? |
|
Definition
most macro nutrients become less available
possible ammonia toxicity >8 pH
possible nitrate toxicity |
|
|
Term
|
Definition
(sum non-acidic cations divided
total exchangeable cation) X 100 |
|
|
Term
| cations in changeable form in solution, soil? |
|
Definition
in order highest to lowest Ontario
calcium
magnesium
potassium
sodium |
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