Tài nguyên được gắn thẻ với: Water Efficiency
9 đề mục được tìm thấy (Hiển thị 1 - 9)
-
01-01-2001 The world's food supply needs to rise significantly, yet both arable and water supplies per capita are decreasing. Not only are modern agricultural methods beyond the reach of those suffering the greatest food insecurity but they are also ecologically damaging, relying upon fossil energy and...
-
01-01-2020 The purpose of this book is to assist the reader in choosing the best method for providing clean water in a developing country. Various approaches are clearly described, and case studies provided, to illustrate the importance of matching need and method when resources are limited. John Dracup in...
-
01-01-2019 Initially associated with hi-tech irrigated agriculture, drip irrigation is now being used by a much wider range of farmers in emerging and developing countries. This book documents the enthusiasm, spread and use of drip irrigation systems by smallholders but also some disappointments and...
-
01-01-2018 Agricultural drainage, such as runoffs from farmlands and wineries, are contaminated waters. Their management is monitored by environmental protection authorities who set targets of volume or pollutant reductions. Due to large quantities and seasonal variations, the targets are often not met, and...
-
01-01-2020 This book on the sustainable use of soils and water addressed a variety of issues related to the utopian desire for environmental sustainability and the deviations from this scene observed in the real world. Competing interests for land are frequently a factor in land degradation, especially...
-
The report examines the relationships between agricultural policies in the North China Plain, the approaches to water management that evolved from them, the quanity of water that was actually used, and the consquent groundwater depletion beneath Luancheng County, Hebei Provice, from 1949-2000.
-
Access Agriculture Training Video Raised beds must be 20 to 30 centimetres high, 80 to 100 centimeters wide and the furrows 30 to 40 centimeters wide. The beds can be 50 to 100 meters long depending on the slope of the field. Because the beds are wide, water is channelled faster through the land,...
- Điều này cũng có sẵn trong:
- Français (fr)
- English (en)
-
01-01-2002 The flux of vapor from soil to seed has been greatly underestimated and probably contributes most of the water imbibed by seed in soils below field capacity. Vapor may also play a greater role than previously thought in root water uptake, wetting fronts, and other cases of water movement in mixed...
-
in this report, the concept and procedures of hydronomic (hydro water +nomus management) zones are introduced. A set of six hydronomic zones are introduced. Hydronomic zones hold potential as a tool to help us better understand complex water interactions within river basins, to isolate similar...