By Top Crop Manager
June 12, 2015 - The OMAFRA field crop unit in collaboration with farm cooperators, agribusiness and SGS-AgriFood Labs conducted the annual survey of soil nitrate nitrogen levels across the province from June 3rd to June 5th, sampling over 130 fields.
The samples were collected after heavy rainfall events during the weekend of May 30-31, where some areas received up to 10 cm (4″) although amounts varied widely. Rainfall events are known to reduce soil N levels due to leaching or denitrification. Delaying sampling a few days after significant rains is always advised but sometimes impossible based on corn stage etc.