Ouvrage de vulgarisation sur principes fonctionnement SCV: litières, biodiversité fonctionnelle, activité biologique; comparaison systèmes conventionnels pour et SCV sur dynamique MO, fertilité, contrôle herbicide, santé plantes.

Manuel de gestion des SCV sur couvertures vivantes ou mortes, visant la production de biomasse grâce à des successions et associations de cultures ayant un rôle de pompe biologique, améliorant structure et fertilité sol, et recherchant l'intégration agriculture/élevage.

Compendium sur Riz Sebota, leur généalogie, les essais variétaux dans le monde, leurs caractéristiques plante et grains, le catalogue, leurs performances dans systèmes de culture diversifiésdans le monde

In order to put in place a suitable advisory system, in an integrated approach at the terroir level, it is necessary to master a range of cropping systems adapted to local conditions. This requires identifying the nature of the most appropriate crops and the order of their succession and/or association, as well as the operational sequence to be applied to these crops or crop associations.

. Réorientation en année 3 du projet PAC. Ebauche résumée d'une agriculture durable à plus long terme : vers la création d'une plateforme multi institutionnelle et d'un réseau agroécologie en Haïti (2° partie et fin).

Based on the understanding of soil/plants/microorganisms interactions and the importance of the primary biomass production in the functioning of the soil system, OMC introduces multifunctional cover crops, growing intercropped or in sequence with the main commercial crop. The introduction of cover crops leads to better utilization of available natural resources, maximization of biomass production and higher organic restitutions to the soil system.

Encapsulation of soil organic carbon (SOC) within aggregates is one of the principal mechanisms for long-term C sequestration, macroaggregate formation and stabilization. Our objectives were to quantify the changes in aggregate size distribution, aggregate-C concentrations and stocks upon conversion of native vegetation (NV) to conventional plow-based tillage (CT), and to assess the rate of aggregation and SOC recovery with no-till (NT) under diverse biomass-C inputs. The study was conducted at both sub-tropical (Ponta Grossa – PG, State of Parana´ ) and tropical (Lucas do Rio Verde – LRV, State of Mato Grosso) sites in Brazil. The SOC content under NV was used as a baseline to evaluate the depletion rate under CT and the restoration rate under NT. A speci?c emphasis was given to the largest macroaggregate size class (8– 19 mm) because of its importance to protecting the recently deposited labile SOC. A discriminant analysis of principal components (DAPC) indicated that NV soil is modi?ed by conversion to an arable land use and that, mechanical tillage, biomass input, and their interactions drastically in?uence the distribution of aggregate-size classes, aggregation indices, and SOC distribution within aggregates. At both sites, soil aggregation indices were positively impacted by NT and associated with SOC concentration in the labile fractions (e.g., total polysaccharides (TPS), hot water extractable organic C (HWEOC), particulate organic C (POC)). At the PG site, the 8–19 mm aggregate size fraction was signi?cantly affected by land use and tillage treatments and represented 54%, 43%, and 72%, under NV, CT, and NT in 0–20 cm depth, respectively. Furthermore, the 8–19 mm size fraction stored 55%, 45%, and 71% of the total SOC stock under NV (53.8 Mg C ha-1), CT (28.5 Mg C ha-1) and NT (51.2 Mg C ha-1), respectively. At the LRV site, the 8–19 mm aggregate size fraction decreased from 50% under Cerrado NV to 35% under CT, and ranged from 33% to 51% under diverse biomass-C input under NT in 0–20 cm depth. The 8–19 mm size fraction stored 52%, 37%, and 41% of the total SOC stock across all aggregate sizes under NV (25.4 Mg C ha-1), CT (11.7 Mg C ha-1), and NT (9.9–18.1 Mg C ha-1), respectively. The difference in SOC stock among land uses is largely attributed to storage in the 8–19 mm aggregate size class, indicating that NT cropping systems rebuilt the largest macroaggregates, which are crucial for stabilization of SOC.

Ce rapport est un modeste document de travail, un guide de construction SCV, à l’usage des chercheurs, des agronomes et des techniciens qui réunit des propositions concrètes aussi bien pour le développement (prioritaire) que pour la recherche pour bâtir rapidement et ensemble, les bases de l’agriculture durable en Guadeloupe et Martinique.

Céréales associées (sorgho ou maïs) avec des plantes de couverture Brachiaria ou Sesbania ou Stylosanthes qui forment biomasse pendant un an ou deux ou jachères avec mélanges restaurateurs de 2 ou 3 plantes de couverture incluant Eleusine qui constituent précédents pour coton. Solutions pour sols hardés : billonnage, riz, sorgho

Projet ESA: Objectifs, structure et fonctionnement. Réalisations: fumure organique, aménagements anti-érosifs, biefs, plantations d'arbres (Faidherbia, Acacia), de haies (Ziziphus, acacia) diversifications des cultures (Riz, soja, ricin, Tournesol, jatropha) - Visite SCAP, Octobre 2009