Influence of nitrogen rate on sulphur requirements for optimum yield of canola
In Saskatchewan and other Prairie Provinces, most canola is grown in the Parkland zone where many soils are deficient or potentially deficient in S for high seed yields of canola. On soils marginally deficient in S, combination of high rates of N fertilizers, high yielding canola cultivars and continuous cropping result in faster depletion of S in soil and increase instances of S deficiencies in canola in the growing season. This can cause substantial reductions in seed yields, apparently due to N:S imbalance in canola plants. Information on the effects of different combinations of fertilizer N and S rates (N:S ratios) on frequency and severity of S deficiencies, and on yield and quality of canola seed is lacking. The objective of this study was to determine the influence of fertilizer N:S ratios (combinations of different N and S rates) on seed yield and quality of canola.
Soils and Crops Workshop