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

为了提高土壤生产力和酸性土壤的健康，钙添加剂通常用于提高肥力和pH值（石灰材料），而非石灰添加剂仅用于提高肥力。然而，现行的土壤酸度诊断系统（DA）、改良剂质量评价系统（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、工业家、农学家和政策制定者）一直要求对这三个组成部分进行调整：农业发展、农业质量和农业改革。我们的研究项目旨在建立一个新的DAQARA系统，保证对石灰改良剂的需求足以保护土壤生产力，以及行业提供的钙改良剂的特性之间的平衡，使各种农业系统可以充分和可持续的方式受益于该领域的应用。该系统DAQARA将通过考虑材料类型、性质、成分以及散布特性和特性（足够的量、选择正确的散布应用方法、频率和时刻）来改进石灰改良剂的做法。该项目得到三家跨国公司的支持：力拓、Graymont和Omya Canada，由于它们在世界各地的活动及其分销网络，它们将通过加入该项目来提高加拿大专门知识的知名度。

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.