GROUP: annual crops (ac) DEFINITION: annual
& herbaceous crops. Includes herbaceous perennials with stem diameter < 5 cm
when mature. Area must be planted to at least one crop every three years. Must identify
USE = Rainfed OR Irrigated
, depending on the feature.
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Classification
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Return
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- Object
- intensive annual vegetable crops & horticulture plots = Intensive crops are
planted in entire field ALL growing seasons of the year: no season with a non-intensive
crop. However, if an intensive crop plot is fallow one or more growing seasons
of the year, but intensive the rest of the year, the classification remains
intensive crops. Includes intensively grown herbaceous perennial crops with
stem diameters <5 cm when mature, such as strawberry (Fragaria ananassa),
asparagus (Asparagus officinalis), pepper (Piper nigrum), vanilla
(Vanilla aromatica), artichoke (Cynara scolymus) and others.
- non-intensive annual crops (grains & staples) = At least one growing
season with cover by non-intensive crops (grains and staples such as potato,
peanut, etc.). Part of the year, the field may be covered by intensive crops.
Example: winter wheat (non-intensive) is usually grown over most of the area
in the winter, even if intensive vegetables are grown in the summer. Example
crops: Wheat (Triticum aestivum), Maize (Zea mays),
Cotton (Gossypium sp.), many others.
- Scale
- small (<30m) areal
- medium-scale (>30m to 1ha)
- large-scale (>1 ha)
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Key
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Return
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- intensive annual vegetable crops & horticulture plots
- small (<30m) areal = ac01
- medium-scale (>30m to 1ha) = ac02
- large-scale (>1 ha) = ac03
- non-intensive annual crops (grains & staples)
- small (<30m) areal = ac04
- medium-scale (>30m to 1ha) = ac05
- large-scale (>1 ha) = ac06
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Dominance Rules
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- IF it is unclear whether the plot is intensive or non-intensive, CHOOSE non-intensive.
- IF only a small (<10m) part of a feature is intensive vs. non-intensive, CHOOSE non-intensive.
- IF plots are small (<10m), an intensive crops feature may include small plots (<10m) of non-intensive crops with up to 40% cover of the larger intensive crops feature. If plots are large, they should be mapped separately.
- IF unclear whether plots are larger or smaller than the scale limit, always choose the larger scale.
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Factors
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Leaf Type:
mixed
Leaf Time:
annual
Tree Cover:
<<10%
Vegetation Cover:
>90%
Height:
<3m
IGBP_DIS:
Croplands; Cropland/Natural Vegetation Mosaics;
Identification:
L1 Minimum:
>10m
L2 Minimum:
>5m
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Compatible Classes
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Return
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Anthropogenic
Mounded
Excavated
Terraced Slope
Floodplain
Foot Slope
Bench Plateau
Summit
Sloping
Steep Slope
Seasonal River
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USE:
Irrigated
Rainfed
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COVER:
Annual
Mixed
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TYPE:
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Mapped Ecotopes
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Return
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ANIAac04
,
ANRAac01
,
ANRAac04
,
BPRAac01
,
BPRAac04
,
EXIAac01
,
FPIAac01
,
FPIAac02
,
FPIAac04
,
FPIAac05
,
FPRAac01
,
FPRAac04
,
FPRAac05
,
FSIAac01
,
FSIAac04
,
FSRAac01
,
FSRAac04
,
SLIAac04
,
SLRAac01
,
SLRAac02
,
SLRAac03
,
SLRAac04
,
SLRAac05
,
SLRAac06
,
SRRAac04
,
SRRAac05
,
SSRAac02
,
SSRAac04
,
SURAac04
,
TSRAac04
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Citation for AEM:
Ellis E. C., H. Wang, H. Xiao, K. Peng, X. P. Liu, S. C. Li, H.
Ouyang, X. Cheng, and L. Z. Yang. 2006. Measuring long-term ecological changes in
densely populated landscapes using current and historical high resolution imagery.
Remote Sensing of Environment
100(4):457-473.