4th IGEOS: International Geography Seminar and PIT IGI 2020

The process of planting

rice in Indonesia has a

variety of times [5].

The majority of 98%

Indonesia's population

consume rice as a staple

food [3].

The estimation time has

led to a disagreement

between government

policies to import rice and

farmers

The use of superior

rice varieties in

Indonesia is still

considered very low,

with only 30% of

farmers [7].

Remote sensing with Sentinel-1 A is

a technology that very

advantageous ineffective mapping

at a large scale [9].

Ciasem district is the first

largest rice production in

Subang. Then Subang is the

third-largest rice

production in West Java &

Indonesia [4]

Characteristics of Rice Growing

Phase based on Backscatter

Spatial Pattern of Rice

Growing Phase

Characteristics of Rice Varieties

based on Backscatter

Spatial Patterns of Rice

Varieties

Spatial Temporal of Growing

Phase and Rice Varieties

Ciasem District, Subang

Regency

Rice Fields

Backscatter of Sentinel-1A

Rice Growing Phase Rice Varieties

Temporal Pattern of Growing

Phase Backscatter Values

Temporal Patterns of Variety

Backscatter Values

1. Temporal Characteristics of Rice Growing Phase Based on Backscatter Value

2. Temporal Characteristics of Rice Varieties Based on Backscatter Value

A. Very Fast Age Group (Inpari 33)

B. Fast Age Group (Inpari 42, Ciherang, and Mekongga)

C. Medium Age Group (PB 42)

• The temporal characteristics of rice varieties based on the backscatter value varied considerably.

• PB 42 varieties have the highest and most varied variations in backscatter values compared to other

varieties.

3. Spatial Pattern of Rice

Growing Phase Based on

Backscatter Value

• The first planting period

starts from the north then

goes to the middle and south.

• Planting period II starts from

the south then to the middle

and finally to the north.

4. Spatial Patterns of Rice Varieties

• In planting period I in dominated by fast variety age groups, Inpari 42, Ciherang, and

Mekongga with 87.76% of the total rice fields.

• Planting period II mostly the same as the previous period dominated by fast variety age

groups, Inpari 42, Ciherang, and Mekongga. However the area has decreased only 77.55%

of the total area of rice fields. Because the farmers who use Inpari 33 variety have

increased in this period.

• The spatial patterns of rice varieties in the first and second planting periods were

categorized as random (test z NNA = 0.68)

• The temporal characteristics of the rice growth phase based on the VH

polarization backscatter value in Ciasem District formed a pattern, that

backscatter value increased from vegetative phase to maturation phase.

The backscatter value in planting period I was higher than planting

period II.

• The temporal characteristics of rice varieties based on the backscatter

value varied considerably. The backscatter value will decrease after the

maturation phase according to the respective age group.

• The spatial pattern of the rice growth phase in the first planting period

starts from the north to south. Meanwhile, during the rice planting period

II starts from the south to north.

• The spatial patterns of rice varieties in the first and second planting

periods were categorized as random (test z NNA = 0.68) with the

dominance of Inpari 42, Ciherang, and Mekongga varieties. Meanwhile,

the Inpari 33 and PB 42 varieties are only spread in some parts of the

Ciasem District.

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2593–2599

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available at http://www.fao.org/3/y4347e/y4347e00.htm

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Security

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2019 International Journal of GEOMATE, 17 106

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http://bbpadi.litbang.pertanian.go.id/index.php/info-berita/tahukah-anda/klasifikasi-umur-tanaman-padi

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15868–15893