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Youth Agripreneurship in Near East and North Africa Regional Meeting Banner









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    An Extension Service in the West Australian Crayfishery 1966
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    青少年生物多样性科普手册 2022
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    《青年与联合国全球联盟学习和行动系列:青少年生物多样性科普手册》是为学校、青年团体和其他好奇的年轻学习者提供的教育资源。本手册从基因、物种和生态系统方面解释了生物多样性。它探索了海底、陆地、空中、河流和湖泊以及生产我们食物的农场的生物多样性。本手册考虑了为什么生物多样性很重要,人类如何影响生物多样性,以及我们必须做些什么来保护世界生物资源。在手册的最后,提供了一些鼓舞人心的青年人领导倡议的例子,并给出了容易遵循的动作计划来帮助你制定自己的生物多样性项目和保护活动。
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    Plant nutrition for food security - A guide for integrated nutrient management 2006
    Of the essential material needs of humankind, the basic requirement is for an adequate supply of air, water and food. People have free access to the air they breathe. However, access to drinking-water and food, while easily obtained for some, is difficult for many. In addition to being physically available, these materials should also be of acceptable quality and continuously so. Hunger and diseases have affected humankind since the dawn of history. Throughout time, there have been p eriods of famine leading to suffering and starvation, making the fight against hunger and the diseases caused by malnutrition a permanent challenge. For many centuries until about 1800, the average grain yield was about 800 kg/ha, providing food only for a few people. The main problems were the low fertility of most soils (mainly caused by the depletion of nutrients) and the great yield losses from crop diseases and pests.