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Small holder farmers and practitioners from Tanzania share agroecology best practices to improve soil fertility. English Subtitles
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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，...
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Access Agriculture Training Video Demi-lunes (half-moons) are in the shaped of a semi-circle with the tips of the bunds on the contour. They come in a variety of sizes, which help with water harvesting in semi-arid areas. They help to improve soil fertility when manure or compost is added. ...
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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...
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2000-10-01 64 pages, illustrated, photos Policy and Best Practice Document 7
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2004-01-01 This notebook contains three sections, integrated soil and fertility management, belowground biodiversity, and participatory research and scaling up of soil fertility restoration technologies. Notebook, various page numbers, illustrated
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2001-12-01 A series of articles on soil organic matter and nitrogen availability in agroforestry systems, cycling of subsoil nutrients and rooting, phosphorus supply and availability, and organic sources of nutrients. 2 volumes Part I, Research publications in international journals Part 2, Reviews
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Eight full papers and extended summaries of ten more from a November 1992 symposium in Minneapolis wrestle with what soil quality means in theory and practice, identify indices to measure it, and assess its biological importance. The collection is seen as the beginning of raising scientific study...
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Proceedings of a symposium sponsored by Divisions S-4 and C-6 of the Soil Science Society of America, Crop Science Society of America, And the American Society of Agronomy, in Anaheim, CA, 28 Nov.-Dec. 1982. This publication is a compilation of papers presented at a symposium held at the 1982...
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Four nutrient deficiencies--phosphorus, potassium, nitrogen, and magnesium--can be diagnosed by observing maize leaves. This document includes photos of a healthy maize leaf and of maize leaves demonstrating each of these nutrient deficiencies. It also contains suggestions for how to address each...
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