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    1. 2017-02-15 This article is from ECHO Asia Note #30 [編者注:Peter是一個在泰國清邁自由顧問,他是德國萊比錫的農業碩士。Peter是“山地項目(Upland program)”的前研究員,這是一個霍恩海姆大學(德國) 和清邁大學(泰國)的合作項目。他的聯系方式是:peter.elstner@gmx.net 我們一直在尋找一個關于東南亞土壤的參考指南。過去不得不依靠很多東南亞國家 提供的土壤樣本碎片, 這些指南數據多數比較陳舊,當然也沒有互動。在這篇 文章中,Peter Elstner 研究了數字土壤地圖,得出東南 亞7個主要土壤種類的結 論。...
    2. 關鍵資源
      2009-01-20 All plants need certain mineral elements for proper growth, development, and maintenance. The basic structure of all organisms is built of carbon (C), oxygen (O) and hydrogen (H). Plants obtain these elements from water (H2O) in the soil and carbon dioxide (CO2) in the air, so no input is...
    3. 2019-10-01 Acidic soils are soils with a pH lower than 7. For most plants, having a pH between 6 and 7.5 is ideal (see table 1 for more exact numbers), but soils can become dangerous when their pH drops beneath 4.5. As the pH drops, aluminum becomes more soluble, toxifying the soil and harming the plants....
    4. 1984-01-01 Excessive soil acidity is a continuing problem in many agricultural areas and is increasingly becoming a yield-limiting factor in other areas. The pH of soils of the dryland wheat-growing area of the Pacific Northwest has dropped an average of one unit in the last 20 years. Similar effects are...
    5. 2004-04-20 Terra preta is very productive soil with long-lasting fertility—unusual in the tropics, where most soils are very weathered, highly acidic, and low in organic matter and essential nutrients. The key to terra preta soils long-term fertility seems to be charcoal; terra preta contains up to 70 times...
    6. ABSTRACT - Journal of Composting Science and Utilization, 2017 Tropical acid soils are highly weathered as they exist under tropical environment with high rainfall and temperature throughout the year, which affects nitrogen availability. Soil organic nitrogen is important in estimating soil...
    7. 2001-04-20 Soil acidity, or low pH, limits plant growth in many parts of the world. Although low pH can harm plants in many ways, this article will deal only with one of these factors, aluminum (Al) toxicity.Al is the third most abundant element on the earth (after oxygen and silicon), and the most abundant...
    8. 2002-01-20 The conventional view of the relationship between soil nutrients and crop productivity in the tropics is leading to both damaging agricultural policies and inefficient and damaging farm-level practices. There is no need to use the huge quantities of chemical fertilizers that are so often...
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