dc.contributor.author | Whittaker, Jennifer | |
dc.date.accessioned | 2017-12-19T18:33:36Z | |
dc.date.available | 2017-12-19T18:33:36Z | |
dc.date.issued | 2017-12-19T18:33:36Z | |
dc.identifier.uri | http://hdl.handle.net/10222/73547 | |
dc.description.abstract | Alternative potato rotations are increasingly being examined that can supply N to potato crops and mitigate nitrate (NO3-) leaching from the root zone. This study examined a legume (RC), grass (T) or legume/ grass mixture (M) on soil N supply, and soil solution N in a subsequent potato crop. The below-ground N contribution of cover crops was also examined using 15N labeled fertilized. Total N uptake in unfertilized potatoes was greater under RC and M than T but did not significantly affect total tuber yield. Overall, NO3- susceptible to leaching was lowest under T. From steel lysimeters, at 80 cm below-ground, the M and T treatments resulted in a 66 and 86% reduction in NO3- respectively from 83 mg NO3-N L-1 from unfertilized potato crops grown subsequent to RC. Labeled root N accounted for 24% of total 15N recovered from residues into a subsequent unfertilized potato under RC and M. | en_US |
dc.subject | NO3 leaching | en_US |
dc.subject | 15N tracer | en_US |
dc.subject | crop residue exchange | en_US |
dc.subject | legume grass mixture | en_US |
dc.subject | roots | en_US |
dc.subject | cover crops | en_US |
dc.subject | Solanum tuberosum | en_US |
dc.title | ASSESSMENT OF COVER CROP SELECTION ON NITROGEN CYCLING IN A THREE-YEAR POTATO ROTATION | en_US |
dc.date.defence | 2017-11-29 | |
dc.contributor.department | Faculty of Agriculture | en_US |
dc.contributor.degree | Master of Science | en_US |
dc.contributor.external-examiner | n/a | en_US |
dc.contributor.graduate-coordinator | Dr. Haibo Niu | en_US |
dc.contributor.thesis-reader | Dr. Bernie Zebarth | en_US |
dc.contributor.thesis-reader | Dr. Derek Lynch | en_US |
dc.contributor.thesis-supervisor | Dr. Judith Nyiraneza | en_US |
dc.contributor.thesis-supervisor | Dr. David Burton | en_US |
dc.contributor.ethics-approval | Not Applicable | en_US |
dc.contributor.manuscripts | Not Applicable | en_US |
dc.contributor.copyright-release | Not Applicable | en_US |