Introduction:
The China 1km Soil Characteristics Dataset (2010) was developed based on China's 1:1000000 scale soil map and 8595 soil profiles from the Second National Soil Survey, as well as the United States Department of Agriculture (USDA) China Regional Land and Climate Modeling Standards. Multilayer soil particle size distribution data set (sand, silt and clay content).
A polygon linking method was used, combining the distance between the soil profile and the map polygon, the sample size of the profile, and soil classification information to derive the content distribution map of sand, silt, and clay. The dataset has a resolution of 1 km and can be used for land and climate modeling at a regional scale. Preface – Artificial Intelligence Tutorial
Soil characteristics include the following aspects:
1. Soil color: The color of soil depends on its organic matter, metal oxides and mineral composition. Soil color not only reflects the soil's fertility and texture, but also indicates its drainage, temperature and the presence of certain substances.
2. Soil texture: Soil texture refers to the proportion of each particle size component in the soil, which is generally divided into clay, sand and silt. Different soil textures affect soil permeability, water retention, and fertilizer retention capabilities, etc., and therefore play an important role in agricultural production and biodiversity maintenance.
3. Soil structure: Soil structure refers to the distribution state of soil particles in the soil, including the connection form, size and shape between soil particles. Good soil structure is conducive to the penetration of air, water and roots, and increases soil aeration, water retention capacity and fertilizer retention capacity.
4. Soil pH: Soil pH refers to the measurement of soil acidity and alkalinity. Different crops have different needs for pH, so the soil needs to be adjusted appropriately according to the needs of different crops.
5. Soil moisture: Soil moisture is very critical to the growth and development of crops. When soil moisture is sufficient, it can provide the nutrients needed by crops and improve the growth environment of crops.
The above are the main characteristics of soil, and their changes will directly affect the growth, development and yield of crops. Therefore, in agricultural production and environmental protection, it is very necessary and important to conduct detailed observation and analysis of soil characteristics, and to rationally utilize and manage soil.
Dataset ID:
TPDC/CHINA_SOIL_CHARACTERISTICS
Time range: 2010-2010
Scope: Nationwide
Source: National Tibetan Plateau Scientific Data Center
Copy code snippet:
var images = pie.ImageCollection("TPDC/CHINA_SOIL_CHARACTERISTICS")
| name | type | Resolution(km) | Value range | Invalid value | Description |
|---|---|---|---|---|---|
| clay1 | float32 | 1 | 0%~100% | -1 | Clay content in surface layer (0-30cm) |
| clay2 | float32 | 1 | 0%~100% | -1 | Clay content in the bottom layer (30-100cm) |
| sand1 | float32 | 1 | 0%~100% | -1 | Sand content in surface layer (0-30cm) |
| sand2 | float32 | 1 | 0%~100% | -1 | >Sand content in the bottom layer (30-100cm) |
| date |
string |
Image date |
Code:
var img = pie.ImageCollection("TPDC/CHINA_SOIL_CHARACTERISTICS")
//.filterDate("2000-01-01", "2006-01-01")
.select("clay1").first()
//.mean();
print(img);
//设定颜色预览组合
visParams = {min:0,max:60,
palette: ['#0D0887','#5B02A3','#9A179B','#CB4678','#EB7852','#FBB32F','#F0F921']};
//定位地图中心
Map.centerObject(img, 3);
//加载影像
Map.addLayer(img, visParams, "img");
Data citation:
Shangguan Wei, Dai Jiongjiu. China Soil Characteristics Dataset (2010). National Tibetan Plateau Scientific Data Center, 2019. DOI: 10.11888/Soil.tpdc.270466. CSTR: 18406.11.Soil.tpdc.270466.
文章引用：
1. Shangguan, W., Dai, Y., Liu, B., Ye, A., and Yuan, H., (2012). A soil particle-size distribution dataset for regional land and climate modelling in China, Geoderma, 171-172, 85-91.