Management of sulphur fertilizers
| dc.contributor.author | Johnston, A.M. | |
| dc.contributor.author | Grant, C.A. | |
| dc.contributor.author | Clayton, G.W. | |
| dc.date.accessioned | 2018-09-06T13:21:02Z | |
| dc.date.available | 2018-09-06T13:21:02Z | |
| dc.date.issued | 1999-02-25 | |
| dc.description.abstract | Sulphur (S) is an important macro-nutrient in the production of canola, a high protein oilseed crop. In the absence of adequate S, canola yield response to added fertilizer N can be completely eliminated. A study was initiated at Brandon, Manitoba, Beaverlodge, Alberta and Melfort, Saskatchewan in 1996 to evaluate the effect of S fertilizer source, placement and application time on the yield and quality of conventional and zero-till seeded canola and spring wheat. The S, including ammonium sulphate (AS), solution ammonium thio-sulphate (ATS) and bentonite clay based elemental S marketed as Tiger-90 (T-90), were all applied at 18 lb S/ac. All treatments received a total N rate of 90 lb/ac, along with MAP at 40 lb P2O5/ac, or 18 lb P/ac. The broadcast fertilizer S was incorporated only with the conventional tillage plots. Where responses to S were recorded, ammonium sulphate (AS) and ammonium thio-sulphate (ATS) corrected S deficiencies in both the application year, and when re-cropped to canola in the following two years. Only when broadcast did T-90 provide a response equivalent to AS. However, this occurred 24 months after application. When the elemental S was pre-seeding banded or seed placed insufficient sulphate was available after 24 months to correct S deficiencies, resulting in yield reductions. Under severe S deficiencies recorded in 1998 a response was recorded for spring wheat to S. The results of this research indicate that in the northern Great Plains region sulphate-S is required to meet short-term S deficiencies in canola. Use of T-90 elemental S requires that the product be broadcast applied at least 24 months prior to crop requirement to allow for oxidation to plant available sulphate-S. Development of finely ground elemental S products will help to increase the conversion to sulphate-S, meeting crop requirements in a shorter time period after application. | en_US |
| dc.description.version | Non-Peer Reviewed | |
| dc.identifier.uri | http://hdl.handle.net/10388/10043 | |
| dc.language.iso | en | en_US |
| dc.relation.ispartof | Soils and Crops Workshop | |
| dc.rights | Attribution-NonCommercial-NoDerivs 2.5 Canada | * |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/2.5/ca/ | * |
| dc.title | Management of sulphur fertilizers | en_US |
| dc.type | Presentation | en_US |