Download or read book Effet des pratiques agricoles sur la min ralisation brute de l azote et de la d composition de la liti re dans une argile limoneuse de la r gion du Lac Saint Jean written by Xavier Plante and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Le phénomène de la diminution des fermes laitières au profit des fermes céréalières observé au Saguenay-Lac-Saint-Jean (SLSJ) et ailleurs au Québec engendre des changements importants concernant la rotation des cultures, le travail du sol et la fertilisation des sols et des cultures. Toutefois, la rotation, le travail du sol et la fertilisation sont toutes des pratiques qui peuvent avoir des impacts importants sur les processus de recyclage et de décomposition de la matière organique (DMO) du sol tels que la minéralisation brute de l'azote (MBN) et la décomposition de la litière (DL). En ce sens, la MBN constitue la capacité des microorganismes du sol à minéraliser l'azote (N) organique en N minéral, alors que la DL représente l'habilité de la biologie du sol (de la mésofaune, à la microfaune, jusqu'à la microflore) à décomposer les résidus de cultures. Jusqu'ici aucune étude issue du SLSJ n'avait encore abordé l'impact à long terme de ces pratiques agricoles sur la DMO. L'objectif principal de l'étude était donc de déterminer la meilleure combinaison de pratique agricole à employer dans le contexte régional du SLSJ pour promouvoir, sur le long terme, la MBN et la DL dans une argile limoneuse. Un dispositif de recherche instauré en 1989 à la ferme de recherche d'Agriculture et Agroalimentaire Canada (AAC) de Normandin a été échantillonné en 2015 et 2016. Le dispositif expérimental utilisé comporte trois facteurs soit : deux rotations [une céréale en continu (CC) soit de l'orge (Hordeum vulgare L.) et une céréale grainée (CG), soit une année d'orge suivie de deux années de trèfle rouge (Trifolium pratense L.) et de dactyle (Dactylis glomerata L. 'Okay')]; deux travaux du sol (chisel et charrue à versoir); et deux fertilisants [lisier de bovin (organique) et engrais minéral de synthèse]. La MBN a été déterminée à l'aide de la technique de dilution isotopique de l'azote-15 (15N) et la DL à l'aide de la technique des sacs de litière enfouis. Nos résultats démontrent une augmentation de la MBN et de la DL lorsque la céréale est cultivée en rotation (CG) plutôt qu'en continu (CC). Le même constat est observé avec la fertilisation à base de lisier de bovin comparativement à la fertilisation minérale. Ces traitements (CG et fertilisation organique) favorisent l'apport en nutriment au sol par l'ajout de la matière organique labile qui favorise l'activité des microorganismes dans le sol. Pour ce qui est des travaux de sol, ceux-ci ne présentent pas de différences majeures par rapport à la MBN et à la DL. L'utilisation du chisel pourrait toutefois représenter une option intéressante pour les agriculteurs de la région puisque son utilisation permet potentiellement de diminuer la profondeur de travail du sol et ainsi augmenter les vitesses de passage. Les résultats de ce projet de maîtrise permettent donc de conclure qu'il est préférable de cultiver les céréales sur une argile limoneuse de la région du SLSJ en rotation avec des plantes fourragères tout en utilisant une fertilisation d'origine organique.
Download or read book UNESCO General History of Africa Vol I Abridged Edition written by Jacqueline Ki-Zerbo and published by Univ of California Press. This book was released on 1990 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This volume covers the period from the end of the Neolithic era to the beginning of the seventh century of our era. This lengthy period includes the civilization of Ancient Egypt, the history of Nubia, Ethiopia, North Africa and the Sahara, as well as of the other regions of the continent and its islands."--Publisher's description
Download or read book Bananas and Food Security written by Claudine Picq and published by Bioversity International. This book was released on 1999 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt: Importance de la banane sur les plans economique et alimentaire; Diversite et dynamique des filieres; Organisation des marches et commercialisation; Systemes de productions/production systems.
Download or read book Dictionary of Building and Civil Engineering written by Don Montague and published by Taylor & Francis. This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.
Download or read book Monitoring soils in the environment with remote sensing and gis written by Richard Escadafal and published by IRD Orstom. This book was released on 1996 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: ISSS congress remote sensing
Download or read book Soil Conservation Districts written by and published by . This book was released on 1963 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Olive Growing written by and published by . This book was released on 2010 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil and Water Conservation written by Boy Scouts of America and published by . This book was released on 1995 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Outlines requirements for pursuing a merit badge in soil and water conservation.
Download or read book Biogeography and Ecology in Australia written by Allen Keast and published by Springer. This book was released on 2013-12-20 with total page 663 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Global and National Soils and Terrain Digital Databases SOTER written by Food and Agriculture Organization of the United Nations. Land and Water Development Division and published by Food & Agriculture Org.. This book was released on 1993 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Historical Dictionary of Iran written by John Henry Lorentz and published by Historical Dictionaries of Asia, Oceania, and the Middle East. This book was released on 2007 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides an overview of specific events, movements, people, political and social groups, places, trends, and chronology. Allows for considerable exploration of a number of historical and contemporary topics and issues. The modern period, defined as 1800-present, is covered extensively.
Download or read book Philostratus written by Philostratus (the Athenian) and published by . This book was released on 1912 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analecta Or Materials For a History of Remarkable Providences Mostly Relating to Scotch Ministers and Christians written by Robert Wodrow and published by BoD – Books on Demand. This book was released on 2024-05-25 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reprint of the original, first published in 1842.
Download or read book The Mbuti Pygmies written by Colin M. Turnbull and published by Harcourt Brace College Publishers. This book was released on 1983 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: This case focuses on the Mbuti pygmy hunter/gatherers of Zaire and their adaptation to change both before and after independence.
Download or read book PC ARCPLOT written by and published by . This book was released on 1994 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Historical Dictionary of Pakistan written by Shahid Javed Burki and published by . This book was released on 1999 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pakistan is unlike most other countries in the emerging world. It is one of the two nations – the other being the state of Israel – founded on the basis of religion. Although it was created to provide a homeland for the Muslim community of British India, in its original form it was able to accommodate only about half of the people of Islamic faith who lived in the subcontinent. Pakistan’s birth in 1947 resulted in one of the largest movements of people in human history when some 14 million people left their homes, with 8 million Muslims leaving India for what is now Pakistan and 6 million Hindus and Sikhs moving in the opposite direction. This was the first large-scale incidence of ethnic cleansing the world was to witness. --
Download or read book The Khoisan Peoples of South Africa written by Isaac Schapera and published by Taylor & Francis. This book was released on 1934 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
