Organic potato farming accounts for only 0.3% of the total potato growing area in Québec (CARTV 2012). Recent consultations with a number of producers and extension agents revealed the lack of an established, effective nitrogen fertilization program that ensures a balanced phosphorus budget. Since potatoes have high nitrogen requirements, using manure to meet this need leads to phosphorus saturation of the soil and its use is necessarily limited on phosphorus-rich soils. The problem is particularly severe with potatoes because fresh manure cannot be used because of the risk of potato scab while composting reduces effective nitrogen content and concentrates the phosphorus. Pelleted chicken manure offers an alternative because it is high in effective nitrogen, but it is costly and also high in phosphorus. So there is a great need to test green manure as a main source of nitrogen. An added benefit is that green manure helps maintain soil quality and control weeds. Testing and validating a nitrogen fertilization program will support the transition to and expansion of organic farming in line with MAPAQ’s strategy in that regard.
From 2016 to 2019
Green manure applied to potato growing areas helps maintain soil quality and control weeds.
Growing Forward 2 | Ministère de l'Agriculture, des Pêcheries et de l'Alimentation du Québec - Innov'Action Programme | Agriculture and Agri-Food Canada
This project aims to limit the impacts of climate change on broccoli crops by evaluating and documenting the tolerance to climatic stress of 10 broccoli varieties intended for the fresh market.
Researcher: Carl Boivin
To increase the productivity of potato production systems and preserve soil quality, we need to enhance our knowledge of interactions among biological, physical, chemical, and agronomic characteristics of cultivated soils in various environments.
Researcher: Richard Hogue