Crop response to four sulfur products applied in north-central Saskatchewan
Sulewski, G.D. and J.J. Schoenau . 1997. InSoils and Crops Workshop Proc., pp. 545-552. Univ. Saskatchewan
Abstract
A field study was conducted based
on previous laboratory, greenhouse and field trial
evidence which suggest a potential use for two
alternative sources of sulfur fertilizer. The efficacy of
(1) crystalline gypsum and (2) a pelleted elemental
sulfur plus sewage sludge combination (DDS°) was
assessed with canola in the year of application.
Comparisons were made with existing sulfate and pelleted
S°-based products. The study was conducted in
north-central Saskatchewan on a marginally sulfur
deficient soil. Results suggest crystalline gypsum was
capable of providing sufficient sulfate supplies early in
the growth season and residual sulfate levels were
maintained. Over the growing season DDS° provided
sulfate supplies and residual sulfate quantities which
were similar to an existing S° product. However, both
S°-based products provided inferior sulfate quantities
when plant demand was highest and negative sulfur
balances at season's end.
Key Words
Elemental sulfur, gypsum, DDS°, fertilizer
