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Author : Gilles BOYER
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (494 download)
Download or read book Elaboration d'une méthode de fertilisation azotée raisonnée written by Gilles BOYER and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Christian Schvartz
Publisher : France Agricole Editions
ISBN 13 : 9782855571201
Total Pages : 420 pages
Book Rating : 4.5/5 (712 download)
Download or read book Guide de la fertilisation raisonnée written by Christian Schvartz and published by France Agricole Editions. This book was released on 2005 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'ouvrage propose aux acteurs de la filière agricole les clefs de la mise en œuvre d'une fertilisation raisonnée, appliquée aux grandes cultures et aux prairies. Après avoir rappelé, le caractère unique des lois de l'agronomie, applicables à toutes les formes de production agricole, les auteurs abordent : - les cycles biologiques fondamentaux des éléments qui contribuent à la nutrition des végétaux, - le calcul de la fertilisation, en fonction de l'offre du sol, des objectifs de production et des interactions entre les sols et les plantes, - les moyens (notamment analytiques) dont l'agriculteur dispose pour déterminer les apports en fertilisants nécessaires ainsi que les modalités de leur application, - les aspects de la fertilisation dans différents contextes environnement, territoires, extensification, économie, qualité, réglementation. La pratique de la fertilisation, longtemps dominée par les seules contraintes technico-économiques, a considérablement évolué au cours des 50 dernières années, valorisant le progrès des connaissances scientifiques, accompagnant les exigences des consommateurs et la prise en compte des contraintes environnementales. A l'heure où l'agriculture raisonnée devient un concept familier du grand public, le COMIFER a souhaité qu'un point complet et précis soit réalisé sur les moyens disponibles pour le développement d'une fertilisation compatible avec une agriculture durable, respectueuse de l'environnement. Ce guide met à la disposition du monde agricole un recueil de références actualisé.
Author : Didier Plas
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (49 download)
Download or read book Adaptation régionale du raisonnement de la fertilisation azotée written by Didier Plas and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Les démarches de validation nationale des méthodes polyvalentes de raisonnement de la fertilisation azotée se heurtent à certains particularismes locaux qui interdisent leur application. Cette étude a pour but d'apprécier l'intérêt d'une approche, par type de milieu, de la problématique liée au développement d'une méthode pratique de gestion des apports d'azote. Dans la zone choisie, l'Aunis, la nature rend uniforme des sols interdit la mesure directe du reliquat. Une méthode articulée, sur la mesure des fournitures du sol par des blés non fertilisés ainsi que sur le concept d'utilisation apparente de l'engrais, a été adoptée à cette petite région. Des réseaux pluriannuels d'essais de plein champ et des expériences sectorielles dont une, essentielle, portant sur l'élaboration d'un modèle de lessivage, ont été nécessaires. Cette méthode, constitue une solution locale qui pourrait intéresser d'autres petites régions agricoles.
Author : Jean-Loup Péroys
Publisher :
ISBN 13 :
Total Pages : 54 pages
Book Rating : 4.:/5 (494 download)
Download or read book Fertilisation azotée en vergers de pêchers et de pommiers written by Jean-Loup Péroys and published by . This book was released on 2007 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: @Dans le cadre de la promotion de l’arboriculture fruitière raisonnée, et compte tenu des aspects défavorables (qualité des fruits affectée, risques sanitaires, etc.) liés à des excès azotés en vergers, l’arboriculture requiert aujourd’hui un raisonnement plus formalisé de la fertilisation azotée. Peu d’outils, directement accessibles à l’arboriculteur, permettent de l’aider à raisonner sa dose. Un prototype d’outil d’aide à la décision a été construit afin de calculer la dose totale d’azote à apporter en vergers de pommiers et de pêchers. La construction de cette calculette repose sur la méthode du bilan, estimant les flux azotés existants en verger via différents formalismes. Le paramétrage prend en compte la typologie culturale et pédo-climatique des différentes zones de production, ainsi que les estimations des besoins des arbres d’après la littérature. Une analyse de sensibilité fait ressortir d’une part l’importance des variables relatives au sol, aux eaux d’irrigation et à l’objectif de rendement, et d’autre part le faible poids des variables relatives aux risques de volatilisation. Cette perte d’azote, calculée sur l’exemple de Balandran, apparaît en effet quasi-inexistante. Les besoins des arbres représentent logiquement la plus grande part des différents flux azotés, suivis des fournitures du sol, révélant la nécessité d’un paramétrage précis de ces termes du bilan. Les mesures effectuées au Ctifl depuis 2003 montrent des besoins des besoins azotés relativement équivalents à ceux qui paramétrés d’après la littérature, avec néanmoins des disparités selon les organes. L’âge des arbres en production semble peu corrélé aux résidus de culture, contrairement au rendement, notamment chez les pêchers, mais d’autres mesures sont à prévoir pour un paramétrage plus juste des besoins. Ce travail fait le point sur les difficultés rencontrées dans la construction et le paramétrage de l’outil, et demande à terme une étape de validation.
Author : Jacques Brossier
Publisher :
ISBN 13 :
Total Pages : 424 pages
Book Rating : 4.:/5 (319 download)
Download or read book Systems Studies in Agriculture and Rural Development written by Jacques Brossier and published by . This book was released on 1994 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Société commerciale des potasses et de l'azote (France).
Publisher :
ISBN 13 :
Total Pages : 37 pages
Book Rating : 4.:/5 (493 download)
Download or read book La fertilisation raisonnée, nord-est written by Société commerciale des potasses et de l'azote (France). and published by . This book was released on 1987 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Connaissances nouvelles pour une fertilisation azotee raisonnee written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : COMIFER,
Publisher :
ISBN 13 : 9782910393090
Total Pages : 103 pages
Book Rating : 4.3/5 (93 download)
Download or read book Calcul de la fertilisation azotée written by COMIFER, and published by . This book was released on 2013-05 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Société commerciale des potasses et de l'azote. Région sud-ouest
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (492 download)
Download or read book Pratique de la fertilisation raisonnée written by Société commerciale des potasses et de l'azote. Région sud-ouest and published by . This book was released on 1981 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 1168 pages
Book Rating : 4.:/5 ( download)
Download or read book Agronomie written by and published by . This book was released on 1983 with total page 1168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Eric Lichtfouse
Publisher : Springer Science & Business Media
ISBN 13 : 9048133335
Total Pages : 478 pages
Book Rating : 4.0/5 (481 download)
Download or read book Sociology, Organic Farming, Climate Change and Soil Science written by Eric Lichtfouse and published by Springer Science & Business Media. This book was released on 2009-12-01 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainable agriculture is a rapidly growing field aiming at producing food and energy in a sustainable way for humans and their children. Sustainable agriculture is a discipline that addresses current issues such as climate change, increasing food and fuel prices, poor-nation starvation, rich-nation obesity, water pollution, soil erosion, fertility loss, pest control, and biodiversity depletion. Novel, environmentally-friendly solutions are proposed based on integrated knowledge from sciences as diverse as agronomy, soil science, molecular biology, chemistry, toxicology, ecology, economy, and social sciences. Indeed, sustainable agriculture decipher mechanisms of processes that occur from the molecular level to the farming system to the global level at time scales ranging from seconds to centuries. For that, scientists use the system approach that involves studying components and interactions of a whole system to address scientific, economic and social issues. In that respect, sustainable agriculture is not a classical, narrow science. Instead of solving problems using the classical painkiller approach that treats only negative impacts, sustainable agriculture treats problem sources. Because most actual society issues are now intertwined, global, and fast-developing, sustainable agriculture will bring solutions to build a safer world. This book series gathers review articles that analyze current agricultural issues and knowledge, then propose alternative solutions. It will therefore help all scientists, decision-makers, professors, farmers and politicians who wish to build a safe agriculture, energy and food system for future generations.
Author : Else K. Bünemann
Publisher : Springer Science & Business Media
ISBN 13 : 3642152716
Total Pages : 485 pages
Book Rating : 4.6/5 (421 download)
Download or read book Phosphorus in Action written by Else K. Bünemann and published by Springer Science & Business Media. This book was released on 2010-11-08 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phosphorus (P) is a finite resource which is essential for life. It is a limiting nutrient in many ecosystems but also a pollutant which can affect biodiversity in terrestrial ecosystems and change the ecology of water bodies. This book collects the latest information on biological processes in soil P cycling, which to date have remained much less understood than physico-chemical processes. The methods section presents spectroscopic techniques and the characterization of microbial P forms, as well as the use of tracers, molecular approaches and modeling of soil-plant systems. The section on processes deals with mycorrhizal symbioses, microbial P solubilization, soil macrofauna, phosphatase enzymes and rhizosphere processes. On the system level, P cycling is examined for grasslands, arctic and alpine soils, forest plantations, tropical forests, and dryland regions. Further, P management with respect to animal production and cropping, and the interactions between global change and P cycling, are treated.
Author : Roy MacLeod
Publisher : Springer Science & Business Media
ISBN 13 : 1402054904
Total Pages : 292 pages
Book Rating : 4.4/5 (2 download)
Download or read book Frontline and Factory written by Roy MacLeod and published by Springer Science & Business Media. This book was released on 2007-05-06 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book represents a first considered attempt to study the factors that conditioned industrial chemistry for war in 1914-18. Taking a comparative perspective, it reflects on the experience of France, Germany, Austria, Russia, Britain, Italy and Russia, and points to significant similarities and differences. It looks at changing patterns in the organisation of industry, and at the emerging symbiosis between science, industry and the military.
Author : J. Gautheyrou
Publisher : CRC Press
ISBN 13 : 9789054107163
Total Pages : 514 pages
Book Rating : 4.1/5 (71 download)
Download or read book Soil Analysis written by J. Gautheyrou and published by CRC Press. This book was released on 2001-01-01 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this book is to provide a better understanding of tools for soil analysis in order to use them more efficiently. It covers sampling problems as well as difficulties relating to actual analysis and quality control.
Author : Benjamin L. Turner
Publisher : Cabi
ISBN 13 : 9780851998220
Total Pages : 399 pages
Book Rating : 4.9/5 (982 download)
Download or read book Organic Phosphorus in the Environment written by Benjamin L. Turner and published by Cabi. This book was released on 2005 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phosphorus is essential for life, yet is often the element most limiting for biological productivity. Although most organisms take up phosphorus in an inorganic form, organic forms frequently dominate in soils and aquatic systems. Up to this point, the role of organic phosphorus and mechanisms for its dynamics have been poorly understood. However, recent advances in research have shed new light on the subject and this book brings together these advances. It covers the transformation and characterization of organic phosphorus in both terrestrial and aquatic systems. It will attract a broad range of scientists from several disciplines.
Author : Food and Agriculture Organization of the United Nations
Publisher : Food & Agriculture Org.
ISBN 13 : 9251098603
Total Pages : 244 pages
Book Rating : 4.2/5 (51 download)
Download or read book Crop ecology, cultivation and uses of cactus pear written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2018-06-05 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cactus plants are precious natural resources that provide nutritious food for people and livestock, especially in dryland areas. Originally published in 1995, this extensively revised edition provides fresh insights into the cactus plant’s genetic resources, physiological traits, soil preferences and vulnerability to pests. It provides invaluable guidance on managing the resource to support food security and offers tips on how to exploit the plant’s culinary qualities.
Author : R. T. Wilson
Publisher : ILRI (aka ILCA and ILRAD)
ISBN 13 :
Total Pages : 598 pages
Book Rating : 4./5 ( download)
Download or read book African Small Ruminant Research and Development written by R. T. Wilson and published by ILRI (aka ILCA and ILRAD). This book was released on 1989-01-01 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains 44 papers and 2 abstracts from a international conference on African small ruminants research and development. eleven papers and 1 abstract deal with the importance of small ruminant production systems and economics. Another 11 describe and analyse feed resources and feeding systems and there are 6 papers on reproductive problems and their solutions. Seven papers and 1 abstract review the prevalent health problems under various management systems and present the solutions to these production constraints. The last 9 papers deal with breeds, breeding systems and breed improvement.
