Phosphorus status of a soil in a long-term experiment
| dc.contributor.author | Karamanos, R.E. | |
| dc.contributor.author | Kruger, G.A. | |
| dc.date.accessioned | 2018-08-04T17:29:54Z | |
| dc.date.available | 2018-08-04T17:29:54Z | |
| dc.date.issued | 2007-03-01 | |
| dc.description.abstract | An experiment that was established in 1982 to assess placement of P fertilizer on the yield of continuous barley was terminated in 2004, after annual application of P (30 kg ha-1) was discontinued in all but one treatment in 2001. Total removal of P during the first 20 years of the experiment (615 kg P2O5 ha-1) was virtually equal to total P application (600 kg P2O5 ha-1); however, when removal by the control that was fertilized with N only was subtracted from the total removal, a residual P component of 474 kg P2O5 ha-1 was obtained as a result. In spite of this, discontinuing P fertilization after 20 years of annual application of 30 kg P2O5 ha-1 resulted in significant reduction in barley grain yield that was greater in the treatments that P was seedrow placed (21%) than either banded (12%) or 1/3 seedrow placed and 2/3 banded (15%). Four week burial of PRS™ probes in 2006 allowed us to ascertain the reasons for these differences that reflected management and P placement practices. The use of PRS™ probes allowed us to interpret over 90% of variations both in P removal and yield of barley over the duration of the experiment. | en_US |
| dc.description.version | Non-Peer Reviewed | |
| dc.identifier.uri | http://hdl.handle.net/10388/9365 | |
| 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.subject | bicarbonate | en_US |
| dc.subject | residual P | en_US |
| dc.subject | barley | en_US |
| dc.subject | placement | en_US |
| dc.subject | PRS™-probes | en_US |
| dc.title | Phosphorus status of a soil in a long-term experiment | en_US |
| dc.type | Presentation | en_US |
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