Système de diagnostic de l'acidité, de la qualité des amendements et de recommandation d'applications calcique (DAQARA) dans les sols agricoles

为了提高酸性土壤的生产力和健康，钙改良剂通常用于提高肥力和pH值（石灰材料），而非石灰改良剂仅用于提高肥力。然而，现行的土壤酸度诊断系统（DA）、改良剂质量诊断系统（QA）和改良剂应用推荐系统（RA）受到越来越多的批评。长期以来，许多关键参与者（农民、工业、农学家和政策制定者）一直要求调整这三个组成部分：DA、QA和RA。我们的研究项目旨在建立一个新的DAQARA系统，以保证在土壤生产力保护所需的石灰改良剂和工业提供的钙改良剂的特性之间取得平衡，以便各种农业系统能够以充分和可持续的方式从该领域的应用中受益。该系统DAQARA将通过考虑材料类型、性质、组成和涂施特性和特殊性（适量、选择正确的涂施方法、频率和时刻）来改进石灰改性的实践。这个项目得到了三家跨国公司的支持：力拓、格雷蒙特和加拿大奥米亚，由于他们在世界各地的活动和他们的分销网络，他们将通过加入这个项目来提高加拿大技术的知名度。

To improve soil productivity and health of acidic soils, calcium amendments are often used to increase fertility and pH (liming materials), and non-liming amendments to increase fertility only. However, the actual system for soil diagnostic of acidity (DA), for the quality of amendments (QA), and that for the recommendation of amendments application (RA) is more and more criticized. Many key players (farmers, industrials, agronomists and policy makers) have, for a long time, asked for an adjustment of these three components: DA, QA, and RA. Our research project aims to build a new DAQARA system that guarantees a balance between the need for lime amendments adequate for the soil productivity protection, and the characteristics of the calcium amendments provided by the industry, so that various agricultural systems can benefit of that field application in an adequate and sustainable way. This system, DAQARA, will lead to improvements in the practices of lime amendment by taking into account material type, nature, composition, and spreading characteristics and specificities (adequate amount, choice of the right spreading application method, frequency and moment). This project is supported by three multinational corporations: Rio-Tinto, Graymont and Omya Canada who, because of their activities around the world and to their distribution network, will contribute by joining this project to increase the visibility of Canada know-how.