Adam Smith Introduction and Plan of the Work THE annual labour of every nation is the fund which originally supplies it with all the necessaries and conveniences of life which it annually consumes, and which consist always either in the immediate pr
SWAT（Soil and Water Assessment Tool）是由美国农业部（USDA）的农业研究中心（ARS，Agricultural Research Service）Jeff Amonld博士1994年开发的。模型开发的最初目的是为了预测在大流域复杂多变的土壤类型、土地利用方式和管理措施条件下，土地管理对水分、泥沙和化学物质的长期影响。它是一种基于GIS基础之上的分布式流域水文模型，近年来得到了快速的发展和应用，主要是利用遥感和地理信息系统提供的空间信息模拟多种不同的水文物理化
Predict physical and chemical properties of soil using spectral measurements.This dataset is sponsored by the [Africa Soil Information Service](http://www.africasoils.net/).利用光谱测量预测土壤的物理和化学性质，该数据集由[非洲土壤信息服务](http://www.africasoils.net/)赞助。
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Laser-induced breakdown spectroscopy (LIBS) is used to determine the total nitrogen (TN) and total phosphorus (TP) in soil. Quantitative determinations are conducted using the line intensity of the analyte element and element concentration. Calibrati
The selection of stable wavebands for the near-infrared (NIR) spectroscopic analysis of total nitrogen (TN) in soil was accomplished by using an improved moving window partial least squares (MWPLS) method. A new modeling approach was performed based
We observe the third-harmonic generation and second-harmonic generation together with element fluorescence from the interaction of a femtosecond laser filament with a rough surface sample (sandy soil) in non-phase-matched directions. The harmonics pr
