問題一覧
1
Most abundant minerals containing Al, O and Si
Silicates or alumino- silicates
2
Capacity to sustain plant life with required nutrients
Soil Fertility
3
High surface area is equivalent to high soil holding capacity
TRUE
4
The process of which running water on the soil surface, wind, ice or other agents transport soil from one place to another
soil erosion
5
Also called as nutrient mining
crop removal
6
Ammonium ion to nitrite will become nitrogen gas
Anammox
7
Conversion from NH4 to NH3 or ammonium to ammonia
Volatilization
8
Conversion from inorganic materials back to organic
immobilization
9
Denitrification caused by what kinds of bacteria
Chemoautotrophic bacteria
10
Conversion from organic to inorganic
Mineralization
11
Reduction of NO3 into gaseous forms of Nitrogen
Denitrification
12
Used by fertiliser companies to manufacture most nitrogen carriers
Haber- Bosch process
13
Is a term which describes in a general way the relative ease in which a nutrient element is supplied by the soil to the plant
Availability
14
The concentration of the nutrients in the soil solution
intensity factor
15
The ability of the soil to replenish the ions in the soil solution as they are absorbed by the root
Capacity factor
16
The rate of replenishment of the nutrients in the soil solution as they are absorbed by plant roots
Rate factor
17
Mechanisms by Which nutrients are made available to plant roots
All of the above
18
When the nutrients dissolved in soil water is transported to the root surface
mass flow
19
Movement of nutrients from higher to lower concentration
Diffusion
20
A process wherein there is an intimate contact with soil surfaces so that ions are exchange directly between the soil particles and the root surface
Contact exchange
21
The nutrients are absorbed by the roots as they ramify through the soil
Root interception
22
Phosphorus comes from apatite minerals
TRUE
23
How many essential elements
18
24
Soil Fertility is edapological approach
TRUE
25
Key role in ATP reactions or energy transformation
Phosphorus
26
Major components of organic compound
All of the above
27
Protein synthesis
Nitrogen
28
Stomatal movements; osmotic potential in plant cells
Potassium
29
These 2 micronutrients involves in nitrogen cycle
Iron, Molybdenum