1. 关键资源 2014-01-01 In order to achieve high levels of agricultural productivity in the tropics at the lowest possible economic and ecological costs, we need to properly understand the relationship between nutrients in the soil and crop productivity. For this to happen, the current understanding needs to change. The...
  2. 2018-10-31 This article is from ECHO Asia Note # 36. 介绍 土壤化学、物理学和生物学特征把土壤划分为高度适宜植物生长到高度不适宜植物生长。非常罕见能找到所有属性都高度适宜植物生长的原生土壤,尤其是在热带。但是,只要有充分的土壤厚度来提供一个足够深度和排水良好的根系区域,相应的改良和土壤属性管理能让几乎所有的土壤变得合适植物生长。甚至是自然状态下不肥沃的土壤和保水性特别低的土壤在合适的管理和投入之后都能有非常高的农作物产量。 土壤对植物生长的不利影响必须通过改良剂、物理处理(耕作)、改变土壤管理行为或这三种方式的组合来消除。例如,土壤板结只能通过翻耕土壤,...
  3. 关键资源
    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...
  4. 2010-01-01 This article is from ECHO Asia Note #4 Does rice straw have any value? Looking at the practices of most farmers, it seems not! The burning of rice straw is a common sight during the harvest period in many parts of Asia. Yet a number of farmers think otherwise. One of them is Isidro Prado from...
  5. 1985-01-01 Green manure crops are crops that are [often times in North America] grown to be turned under to increase soil fertility. Leguminous green manure crops ( i.e., those which can make nitrogen fertilizers from atmospheric nitrogen) can offer small-scale Third World farmers a tremendous number of...
  6. 关键资源 2016-09-28 Farmers in many parts of the world, because of human population growth, have little choice but to crop their land continuously, with scarce resources to replace nutrients withdrawn by each successive crop. Crop residues are often lost as a source of organic matter and mulch, usually through...
  7. Small holder farmers and practitioners from Tanzania share agroecology best practices to improve soil fertility. English Subtitles
  8. Abstract, Makerere University Dissertations, 2019 Low crop yields due to low erratic rainfall, high evapo-transpiration, and deteriorating soil fertility in semi-arid areas of the country, have led to a quest for sustainable production practices with greater resource use efficiency in order...
  9. The result of several symposia held at the American Society of Agronomy and Soil Science Society of America annual meetings in Cincinnati, Ohio, November 1993, this volume brings together the latest ideas and knowledge for improving nutrient recommendations, examining the prospects of improving...
  10. Abstract, PLoS One, 2017 Sustainability of maize-based cropping systems is a major challenge for southern Africa, yet the demand for maize as staple food and animal feed in the region continues to increase. A study was conducted on a sandy clay loam (220 g clay kg-1soil) at Domboshawa in Zimbabwe...