Lentil is a valuable crop in rotation particularly because it can supply its own nitrogen requirements. Sustainable lentil production is dependent on effective weed control. Currently there is limited number of products with narrow windows of application. Information on the effect of herbicide on nodulation and the plants ability to produce nitrogen. Additionally, current seeding recommendations are based on large green lentil seeds. It is important for the profitability of lentil production that accurate seeding rate information is available. This project will determine the optimal seeding rate for Clearfield red lentil varieties, the effect of herbicides and how to optimize their use as well as the impact of starter nitrogen on the lentil plants ability to fix nitrogen.