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Author : M. Brouwers
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (672 download)
Download or read book Contribution a l'etude de la fertilisation phosphatee des sols du bas glacis written by M. Brouwers and published by . This book was released on 1977 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bousselham Loudyi
Publisher :
ISBN 13 :
Total Pages : 442 pages
Book Rating : 4.:/5 (113 download)
Download or read book Contribution à l'étude de la chimie du phosphore et de la fertilisation phosphatée des sols du plateau de Meknès written by Bousselham Loudyi and published by . This book was released on 1989 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Louis Gachon
Publisher :
ISBN 13 :
Total Pages : 572 pages
Book Rating : 4.E/5 ( download)
Download or read book Phosphore et potassium dans les relations sol-plante written by Louis Gachon and published by . This book was released on 1988 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le comportement du phosphore et du potassium dans le sol; Les methodes d'appreciation de la fertilite phosphatee et potassique du sol; Resultats d'essais de longue duree; Le comportement des plantes et la qualite des produits; Etude des engrais.
Author : Aime Jean Nyamsi André Messiga
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (113 download)
Download or read book Transferts du phosphore dans les sols de grandes cultures written by Aime Jean Nyamsi André Messiga and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'amélioration de notre compréhension des mécanismes et processus qui affectent le cycle du phosphore (P) dans les sols de grandes cultures est un préalable au développement de meilleures pratiques de sa gestion. L'objectif général de l'étude a été de déterminer l'effet des pratiques agricoles (travail du sol, fertilisation phosphatée, systèmes de cultures) sur la dynamique du P, particulièrement le P disponible aux plantes, dans les sols de grandes cultures. Nous avons aussi déterminé l'effet des cycles de gel et de dégel sur la disponibilité du P de la couche superficielle du sol, et la distribution du P dans les agrégats dans le semis direct et le labour conventionnel. Deux sites de longue durée, Canadien et Français, ont été utilisés. Le site Canadien est une rotation maïs - soja dans laquelle les facteurs de variation ont été le travail du sol (semis direct, labour conventionnel), les cycles de gel et de dégel et la fertilisation phosphatée. Le site Français est une monoculture de maïs où on a fait varier la fertilisation phosphatée. Dans les deux types de travail du sol, le P du sol disponible aux plantes sous une rotation biannuelle maïs - soja diminue avec le temps pour se stabiliser autour de 30 et 25 mg P kg−1 avec le traitement 0 P dans le semis direct et le labour conventionnel, respectivement. Dans la monoculture de maïs, il y a une relation linéaire stable quelque soit la durée d'expérimentation entre le statut de P et le bilan cumulé. L'évaluation mécaniste et quantitative de la disponibilité du P du sol aux plantes permet de modéliser les variations du statut de P du sol pour les régimes de fertilisation équilibrés. Cette étude a montré que l'augmentation des cycles de gel et de dégel entraîne des niveaux élevés de P extrait à l'eau et la solution Mehlich-3 dans le semis direct amendé de résidus de culture comparé au labour conventionnel. Lorsque le sol est séparé en agrégats stables à l'eau, la teneur en P extrait à l'eau des agrégats sous le semis direct augmente dans l'ordre particule-(limon + argile)
Author : Amara Rezig (auteur d'une thèse de sciences.)
Publisher :
ISBN 13 :
Total Pages : 206 pages
Book Rating : 4.:/5 (465 download)
Download or read book Contribution à l'étude des intéractions matière organique-phosphore dans deux sols lorrains written by Amara Rezig (auteur d'une thèse de sciences.) and published by . This book was released on 1983 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bernard LeBuanec
Publisher :
ISBN 13 :
Total Pages : 260 pages
Book Rating : 4.:/5 (814 download)
Download or read book Contribution à l'étude de la carence en phosphore des sols sur granite en Côte-d'Ivoire written by Bernard LeBuanec and published by . This book was released on 1973 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : M. Kaennel
Publisher : Springer Science & Business Media
ISBN 13 : 3642795358
Total Pages : 474 pages
Book Rating : 4.6/5 (427 download)
Download or read book Forest Decline and Atmospheric Deposition Effects in the French Mountains written by M. Kaennel and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forest decline became a matter of public and scientific concern in France in 1983 when conifers in the Vosges mountains were found to exhibit unusual crown deterioration. An impassioned controversy on a supposedly large scale forest health problem was then in full swing in Central Europe. A co-ordinated research programme entitled DEFORPA ("Deperissement des For~ts et Pollution AtmospMrique") was launched in 1984. This programme ran from 1984 to 1991 and a number of projects are still in progress. The Programme was sponsored by three French ministries (Enviroument, Agriculture and Forestry, Research and Technologyl), several state agencies, various regional authorities and the Commission of the European Communities (DO xn and DG VI). Initially, emphasis was solely laid on the understanding of forest decline in the mountainous areas - because damage was most obvious there - in relation to natural and man-made factors. Air pollution was given high but not overwhelming priority. Thus, the DEFORPA Programme was not in its essence a nation-wide assessment of air pollution effects, unlike a number of national acidification research programmes in Europe and North America. During. the programme, however, the areas of concern expanded. In particular, research into water acidification in the Vosges mountains was developed in parallel with the DEFORPA Programme, and possible eutrophication of the ground flora in northeastern France became the subject of new research.
Author : K. Paijmans
Publisher : Elsevier Science & Technology
ISBN 13 :
Total Pages : 240 pages
Book Rating : 4.3/5 (91 download)
Download or read book New Guinea Vegetation written by K. Paijmans and published by Elsevier Science & Technology. This book was released on 1976 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : P. Lavelle
Publisher : Springer Science & Business Media
ISBN 13 : 0306481626
Total Pages : 678 pages
Book Rating : 4.3/5 (64 download)
Download or read book Soil Ecology written by P. Lavelle and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt: A number of excellent textbooks on general ecology are currently available but‚ to date‚ none have been dedicated to the study of soil ecology. This is important because the soil‚ as the ‘epidermis’ of our planet‚ is the major component of the terrestrial biosphere. In the present age‚ it is difficult to understand how one could be interested in general ecology without having some knowledge of the soil and further‚ to study the soil without taking into account its biological components and ecological setting. It is this deficiency that the two authors‚ Patrick Lavelle and Alister Spain‚ have wished to address in writing their text. A reading of this work‚ entitled ‘Soil Ecology’‚ shows it to be very complete and extremely innovative in its conceptual plan. In addition‚ it follows straightforwardly through a development which unfolds over four substantial chapters. Firstly‚ the authors consider the soil as a porous and finely divided medium of b- organomineral origin‚ whose physical structure and organisation foster the development of a multitude of specifically adapted organisms (microbial communities‚ roots of higher plants‚ macro-invertebrates).
Author : B.A. Roberts
Publisher : Springer Science & Business Media
ISBN 13 : 9401137226
Total Pages : 425 pages
Book Rating : 4.4/5 (11 download)
Download or read book The Ecology of Areas with Serpentinized Rocks written by B.A. Roberts and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kleber Del-Claro
Publisher : Springer Nature
ISBN 13 : 3030668770
Total Pages : 357 pages
Book Rating : 4.0/5 (36 download)
Download or read book Plant-Animal Interactions written by Kleber Del-Claro and published by Springer Nature. This book was released on 2021-06-04 with total page 357 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook provides the first overview of plant-animal interactions for twenty years focused on the needs of students and professors. It discusses a range of topics from the basic structures of plant-animal interactions to their evolutionary implications in producing and maintaining biodiversity. It also highlights innovative aspects of plant-animal interactions that can represent highly productive research avenues, making it a valuable resource for anyone interested in a future career in ecology. Written by leading experts, and employing a variety of didactic tools, the book is useful for students and teachers involved in advanced undergraduate and graduate courses addressing areas such as herbivory, trophic relationships, plant defense, pollination and biodiversity.
Author : J. H. Leigh
Publisher :
ISBN 13 :
Total Pages : 132 pages
Book Rating : 4.F/5 ( download)
Download or read book Threatened Australian Plants written by J. H. Leigh and published by . This book was released on 1992 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : R. R. Brooks
Publisher :
ISBN 13 :
Total Pages : 526 pages
Book Rating : 4.3/5 (91 download)
Download or read book Serpentine and Its Vegetation written by R. R. Brooks and published by . This book was released on 1987 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: An exhaustive worldwide survey of serpentine soils and the characteristic vegetation that they support. It includes a continent-by-continent listing of known serpentine locations.
