PSS 10; water; test 2
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- What is gravitational water?
- -ground water
- What is field capacity?
- -maximum amount of water that a soil can hold against the force of gravity
- What is capillary water?
- -water available to plant
- What is the wilting point?
- -point at which a plant is unable to take up additional water from the soil
- What is hygroscopic water?
- -water not available to the plant
- What can excess soil moisture cause?
-
-lack of aeration so root cells can't function well
-wilted foliage
-disease (fungal and bacterial, damping-off) - What can excess rainfall cause?
-
-cracking of sugar-rich craps like cherries and tomatoes
-erosion
-leachin gof mineral nutrients
-anaerobic respiration produces alchol in water-logged roots - What are signs of water deficiency?
-
-first symptom is gray foliage
-leaves and stems wilt
-leaves curl and drop off
-fruits wither and drop - What causes blossom end rot on tomatoes, peppers, etc?
- -water stress and insufficient calcium
- What causes algae blooms?
-
-phosphorus in surface water
*depletes oxygen from the water at night and kills fish