Response of irrigated crops to split-N application
| dc.contributor.author | Swerhone, G.D.W. | |
| dc.contributor.author | van Kessel, C. | |
| dc.contributor.author | Livingston, N.J. | |
| dc.date.accessioned | 2018-09-18T12:27:22Z | |
| dc.date.available | 2018-09-18T12:27:22Z | |
| dc.date.issued | 1990-02-22 | |
| dc.description.abstract | The efficiency and benefits of split N applications by cereals and oilseed was evaluated at the Irrigation Fann at Outlook. In 1988, canola (Westar) received 0, 75 + 75, or 150 kg N/ha in the form of urea (U) or urea-ammonium nitrate (UAN). In 1989, durum (Kyle), soft wheat (Fielder) and canola (Westar) received 0, 100, 100+100, or 200 kg N/ha in the form of U or ammonium nitrate (AN). Plants were harvest five times during the growing season. In 1988, the second N application occurred at 54 days after planting. In 1989, the second N application for durum and soft wheat occurred at 45 days after planting (Feekes 7) and 38 days after planting for canola. In 1988, unfertilized canola showed a grain yield of 1832 kg/ha, whereas the application of 150 kg N increased grain yield to 3012 kg/ha. Split-N application, however, did not increase grain yield as compared with canola fertilized with 150 kg N/ha at time of seeding. No significant differences in grain yield between U and UAN fertilized canola were found. In 1989 canola, durum and soft wheat responded strongly to N fertilizer. Unfertilized durum showed a grain yield of 2267 kg/ha, whereas durum fertilized with 200 kg N/ha showed a grain yield of 3952 kg/ha. Grain yields for unfertilized and fertilized soft wheat were 2981 and 5358 kg/ha, respectively. N fertilization increased grain yield of canola from 1049 to 1890 kg/ha. However, no differences in grain yield were found between crops that received all fertilizer-N at time of seeding and crops that received half of its fertilizer-N 38 days after planting. It was found that most of the N required for crop growth was taken up early in the growing season. It appears that N should be available soon after seeding and that under Saskatchewan growing conditions the time frame during which the second split N application can be carried out successfully is short, or perhaps, even non-existent. | en_US |
| dc.description.version | Non-Peer Reviewed | |
| dc.identifier.uri | http://hdl.handle.net/10388/10677 | |
| 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 | Response of irrigated crops to split-N application | en_US |
| dc.type | Presentation | en_US |