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situation
    SOIL SALINIZATION SITUATION AND ITS IMPROVEMENT APPROACH IN HAINAN PREFECTURE
    海南州土壤盐渍化状况和改良途径
    Studies on Available Sulphur Situation in Agricultural Environment in Hunan
    湖南省农业环境有效硫状况的研究
    Present Situation of Water Erosion in West China
    中国西部地区水土流失状况
    The principal component analysis of salinized situation in desert land of Chaidamu basin
    柴达木盆地弃耕地盐渍状况的主分量分析
    Situation of Farmland Fertility in Recent Years and Measures for Economical Fertilization in Jiangxi
    江西近年农田肥力状况分析与节本施肥对策
    Phosphorous Situation in Soil and Demand Prediction for P Fertilizer of Guangdong Province
    广东省土壤磷素状况及磷肥需求预测
    Investigation on Situation of Fertilizer Application and Monitoring of Soil Fertility in Farmland in Shaanxi Province
    陕西省施肥状况调查及农田土壤肥力监测
    Those are soil erosion actual status survey and assessment on regional scale, regional dynamic change analysis of soil erosion status, and situation simulation.
    针对研究的时间尺度,提出区域土壤侵蚀研究主要包含三个方面的内容,区域土壤侵蚀调查、区域土壤侵蚀状况变化分析和区域土壤侵蚀状况的模拟与预测;
    1. Situation of test soil The test soil was from 0~20cm sample in Longkou, Shandong Province.
    1.供试土壤状况供试土壤采自山东省龙口市0~20cm 的土样。
    After about ten year efforts, the eco-security index is increased from 0.4206 to 0.5795, which indicates the eco-security situation of research area is better and better.
    经过多年的水土流失治理,研究区的生态安全指数从1994 年的0.4206 提高到了2003 年的0.5795,表明研究区的生态安全状况有了较大的好转;
    Through the determination of water characteristic curve, specific water volume, moisture constant,permeation coefficient, the situation of pore space and other physical characteristics of sandy soil in Huangfan plain, it was found that the empirical equation θ=AS -B could well simulate the water characteristic curve of soil during the low and medium suction (0.02×10 5 Pa~15.0×10 5 Pa).
    通过对黄泛平原砂质潮土水分特征曲线、比水容量、水分常数、渗透系数、孔隙状况及部分物理性质的测定,发现经验方程θ= AS- B在低、中吸力段(0.02×105 Pa~15.0×105Pa) 对土壤水分特征曲线有良好的模拟性。
 

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