Modelling land use strategies to optimise crop production and protection of ecologically important weed species

There is a need to develop farming systems that enable both a satisfactory level of crop production and suitable environmental conditions for natural species. Wildlife-friendly cropping techniques, such as a reduced amount of applied herbicide or a lower crop density, might be adopted in order to maintain populations of weed species of biological interest. An alternative might be to adopt an intensive cropping system in a part of the field and spare the other part as set-aside or field margins, available for the natural development of plant species. The objective of this study was to present a method to compare two strategies for maintaining a desirable level of abundance of a given species of interest in agricultural areas, specifically (i) a strategy based on a wildlife-friendly cropping system in a large cultivated area and (ii) a strategy based on a more intensive cropping system in a reduced area of cultivation, i.e. with land-sparing. The principle is to calculate the ratio of crop production obtained with strategy (i) to the production obtained with strategy (ii) for a given target density of natural species. We show that the value of this ratio, and thus the relative performance of the two strategies, depends on the density of the weed species that can be maintained in an uncultivated ecological area. The method is applied in case studies of two plant species with contrasting ecology and conservation goals. The numerical results show that the strategy based on a wildlife-friendly cropping system is more profitable in most situations

Introduction Des Organismes Génétiquement Modifiés(OGM) Dans L’agriculture En Côte d’Ivoire: Etat De Connaissance Et Souhaits Des Populations De Six (6) Localités Du Sud Du Pays

Transgenic plants with their huge potential as the high yields, resistance to diseases, insects and water stress seem to be a solution for Africa and could contribute to poverty reduction and the increase of agricultural production in this area of the world often face starvation. However GMOs dragging a trail of controversy and risk maligned with a series of impacts that concern the human health, environmental, social and economic. Is the dangerousness of transgenic plants a concern people of Ivory Coast? Investigations were carried out on 400 farmers and 1000 educated people in through a series of questions

Alternatives à la lutte chimique contre les adventices

International audienc

Application des méthodes numériques à l'étude de la végétation du Sud-Est de l'Yonne

Gasquez Jacques. Application des méthodes numériques à l'étude de la végétation du Sud-Est de l'Yonne. In: Bulletin mensuel de la Société linnéenne de Lyon, 39ᵉ année, n°10, décembre 1970. pp. 308-324

La résistance aux herbicides: comment l'éviter ou la maîtriser si elle apparaît

National audienc

Des mauvaises herbes a bien connaitre pour un desherbage efficace

National audienc