Soil Science - 7. Soil Conservation and Management
0.0(0)
Studied by 2 people0.0(0)
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt PlayCard Sorting
1/26
Earn XP
Description and Tags
Study Analytics
Name | Mastery | Learn | Test | Matching | Spaced |
|---|
No study sessions yet.
27 Terms
1
New cards
Soil erosion
detachment and subsequent transport of soil
undesirable process in agriculture mainly because of losses
undesirable process in agriculture mainly because of losses
2
New cards
Mechanism of Soil Erosion
dispersion
raindrops splash soil sediments
supplied by kinetic energy
dispersion
raindrops splash soil sediments
supplied by kinetic energy
3
New cards
Entrainment
Mechanism of Soil Erosion
transport of suspended soil from upslope to downhill
transport of suspended soil from upslope to downhill
4
New cards
Deposition
Mechanism of Soil Erosion
settles out under the action of gravity
rapid for sand
slow for clay
settles out under the action of gravity
rapid for sand
slow for clay
5
New cards
Geologic erosion
Types of Soil Erosion
natural rate
natural process
natural rate
natural process
6
New cards
Geologic erosion
Types of Soil Erosion
smoothing downhill & mountains
1mm/yr = natural vegetation
smoothing downhill & mountains
1mm/yr = natural vegetation
7
New cards
Accelerated erosion
removal of topsoil
associated with human activities
10mm/yr
associated with human activities
10mm/yr
8
New cards
Raindrop
Forms of Soil Erosion
impact of raindrops
splashed at a longer distance
downslope
impact of raindrops
splashed at a longer distance
downslope
9
New cards
Sheet
Forms of Soil Erosion
removal of thin layer ‘sheet’
most widespread and most damaging
recognized soil deposition
removal of thin layer ‘sheet’
most widespread and most damaging
recognized soil deposition
10
New cards
Channel
Forms of Soil Erosion
water has concentrated > large mass
water has concentrated > large mass
11
New cards
Rill channel
small channels
water washing down rows
water washing down rows
12
New cards
Gully channel
advance rill erosion, increasing size of rills
13
New cards
Stream channel
carrying off the soil material on the side
14
New cards
Rainfall intensity
positively correlated to soil erosion
ratio of the total amount of rain (rainfall depth) falling during a given period to the duration of the period
ratio of the total amount of rain (rainfall depth) falling during a given period to the duration of the period
15
New cards
Rainfall erosivity
the potential ability to cause erosion
an index that describes the power of rainfall to cause soil erosion
an index that describes the power of rainfall to cause soil erosion
16
New cards
Soil erodibility
soil vulnerability to erosion
influenced by structural stability
influenced by structural stability
17
New cards
Estimation of Soil Erosion
guide in selecting the most appropriate system and management practices
18
New cards
R
Estimation of Soil Erosion
rainfall positivity index
rainfall positivity index
19
New cards
K
Estimation of Soil Erosion
soil erodibility
soil erodibility
20
New cards
L
Estimation of Soil Erosion
slope length factor
slope length factor
21
New cards
S
Estimation of Soil Erosion
slope gradient factor
slope gradient factor
22
New cards
C
Estimation of Soil Erosion
cropping system and management factor
cropping system and management factor
23
New cards
P
Estimation of Soil Erosion
erosion control practice factor
erosion control practice factor
24
New cards
T
Estimation of Soil Erosion
tolerable soil loss
tolerable soil loss
25
New cards
Cultural Soil and Water Conservation Measures
Conservation tillage
correction of soil problems
correction of soil problems
26
New cards
Biological Soil and Water Conservation Measures
Strip cropping (pilas-tanim)
Agroforestry
Agroforestry
27
New cards
Soil and Water Conservation MeasuresMechanical
Terracing; broad channels
Grassed waterways
Pond
Grassed waterways
Pond
Note 
Flashcards (132)