Related items
Showing items related by metadata.
-
-
-
Book (stand-alone)Policy brief作物前景与粮食形势 - 第4期 n 2007年7月 2007粮农组织对2007年世界谷物产量的最新预测仍然显示产量将达创纪 录水平,目前预测为21.21亿吨。预计增长量的大部分为玉米,但 小麦的大幅增产和稻米收成的提高也是谷物收成创纪录的原因。 n 2007年世界谷物产量预测达创纪录水平在很大程度上是受到美国玉 米收成将创历史新高的前景的支持,由于生物燃料工业需求旺盛, 该国播种面积达1940年以来的最高水平。但在发达国家中的其它主 要谷物生产国,由于欧洲东南部地区发生干旱,2007年该区域收成 前景看淡。
Users also downloaded
Showing related downloaded files
-
Book (stand-alone)General interest bookВопросы лесного хозяйства и агролесоводства в национальных планах адаптации
Вспомогательные руководящие принципы
2023Данная публикация «Вопросы лесного хозяйства и агролесоводства в национальных планах адаптации: вспомогательные руководящие принципы» представляет собой техническое руководство по интеграции лесов, агролесоводства и деревьев в процесс разработки и реализации НПА. Его цель – информировать разработчиков политики и государственных служащих, ответственных за планирование и процессы в рамках НПА, а также субъектов деятельности в области лесного хозяйства и других заинтересованных сторон о потребностях лесного хозяйства и агролесоводства для адаптации и их потенциале для поддержки адаптации других отраслей, подотраслей и видов деятельности. -
Book (stand-alone)Manual / guideManuel d'étude sur la composition des aliments, vol.1
questions & exercises
2011Le Guide d'étude de la composition des aliments est publié en deux volumes : Questions et exercices - Volume 1 et Réponses aux questions et exercices - Volume 2. Les deux volumes consistent en 17 modules regroupés sous 12 grands thèmes. Chaque module est séparé en différentes sections. Le premier énonce les objectifs d'apprentissage, la matière à étudier et une estimation du temps nécessaire pour compléter le module. Souvent, beaucoup de ressources ou de matériel de référence sont indiqués avec du matériel de lecture supplémentaire. La deuxième section contient les questions, la troisième les exercices. Dans le volume avec les réponses, une section supplémentaire fournit le retour d'information général. -
Book (series)Technical studyPacific oyster farming
A practical manual
2024Also available in:
No results found.The purpose of this manual is to give the reader a foundation of practical knowledge regarding all aspects of Pacific oyster cultivation. It is targeted at new entrants to the market wishing to establish a farm, and existing operators who wish to develop their farms and explore new cultivation techniques. The methodologies described can be applied both to low-tech, low budget, small-scale farming operations and to high-tech, big budget, industrial-scale aquaculture production enterprises. This guide focuses on the functional expertise and technical equipment required to construct and manage an operational farm in the diverse environmental and physical locations in which they can be situated, from the initial stages of finding and selecting a suitable site, to the conclusion of the first production cycle and harvesting the crop. The manual contains a brief introduction which describes the relevance of the species with regards to global aquaculture production figures and how it can form an important part of future food production strategies. Chapter 2 describes the anatomy and biology of Crassostrea gigas and gives an indication as to the environmental conditions in which the species thrives as well as the pathologies and predators that can result in poor health leading to potential mortalities. Chapter 3 deals with all aspects of undertaking a survey of potential oyster farming sites and what data should be collected and examined to assess a site’s suitability, but also which areas are best suited to different cultivation techniques. After this, Chapter 4 introduces the main farming techniques that will be described in detail in the following chapters, which includes off-bottom cultivation, on-bottom cultivation, and suspended cultivation, and gives details of some of the most common cultivation equipment necessary to undertake these operations. The techniques and strategies necessary to procure seed oysters and how to develop them through the nursery stage are also introduced. This includes the basic principles of upwelling, which then leads into Chapter 5, which provides a detailed description of how to build and operate one particular example of a Floating Upwelling System (Flupsy) which is suitable for use in remote but sheltered conditions. Chapters 6, 7 and 8 constitute the main body of the manual and provide an in-depth look into the three major cultivation techniques that this guide concentrates on: “Farming with trestles and bags in the intertidal zone”, “On-bottom cultivation in the intertidal or subtidal zone” and “Offshore longline cultivation”.