Tissue Testing Guidelines for N Management in Irrigated Malting Barley, Maricopa, 1999
dc.contributor.author | Riley, E. A. | |
dc.contributor.author | Thompson, T. L. | |
dc.contributor.author | White, S. A. | |
dc.contributor.author | Ottman, M. J. | |
dc.contributor.editor | Ottman, Michael J. | en_US |
dc.date.accessioned | 2012-01-26T19:09:24Z | |
dc.date.available | 2012-01-26T19:09:24Z | |
dc.date.issued | 1999-05 | |
dc.identifier.uri | http://hdl.handle.net/10150/205159 | |
dc.description.abstract | Malting barley is not a widely planted crop in the Southwest, due to grain protein contents that can sometimes exceed the industry standard of 11.4 %. To achieve < 11.4% grain protein, careful nitrogen (N) management is needed. Tissue testing guidelines for N management for reduced grain protein and acceptable yields have not yet been determined for malting barley in the Southwest. The objectives of this study were to: (i) correlate NO₃-N in dried stem tissue with sap NO₃-N, and (ii) develop stem NO₃-N guidelines for N management in malting barley. In November 1998 two varieties of malting barley, Morex and Crystal, were planted at the Maricopa Agricultural Center. Five N rates (0, 60, 120, 180, and 240 lbs/acre) were applied in four split applications. Each treatment was replicated three times in a randomized complete block design. Samples were collected from lower stems at the 3-4 leaf 2 node, and flag leaf visible growth stages. Grain yields ranged from 1011 lbs/A to 2677 lbs/A for Morex and 827 lbs/A to 2641 lbs/A for Crystal. Grain protein ranged from 6.94 -11.5% (Morex) and 8.48-13.0% (Crystal). Correlation coefficients between stem NO₃-N and sap NO₃-N were 0.83 for Morex and 0.85 for Crystal. For Morex and Crystal, grain protein was within the malting industry grain protein range of 10.5-11.4% and yield was optimized at 180 lbs N/A. Sap NO₃ analysis can be a useful tool for determining N status of malting barley. | |
dc.language.iso | en_US | en_US |
dc.publisher | College of Agriculture, University of Arizona (Tucson, AZ) | en_US |
dc.relation.ispartofseries | AZ1147 | en_US |
dc.relation.ispartofseries | Series P-119 | en_US |
dc.subject | Agriculture -- Arizona | en_US |
dc.subject | Grain -- Arizona | en_US |
dc.subject | Forage plants -- Arizona | en_US |
dc.subject | Barley -- Arizona | en_US |
dc.subject | Wheat -- Arizona | en_US |
dc.subject | Barley -- Fertilizer management | en_US |
dc.subject | Wheat -- Fertilizer management | en_US |
dc.title | Tissue Testing Guidelines for N Management in Irrigated Malting Barley, Maricopa, 1999 | en_US |
dc.type | text | en_US |
dc.type | Article | en_US |
dc.identifier.journal | Forage and Grain: A College of Agriculture Report | en_US |
refterms.dateFOA | 2018-08-26T00:23:50Z | |
html.description.abstract | Malting barley is not a widely planted crop in the Southwest, due to grain protein contents that can sometimes exceed the industry standard of 11.4 %. To achieve < 11.4% grain protein, careful nitrogen (N) management is needed. Tissue testing guidelines for N management for reduced grain protein and acceptable yields have not yet been determined for malting barley in the Southwest. The objectives of this study were to: (i) correlate NO₃-N in dried stem tissue with sap NO₃-N, and (ii) develop stem NO₃-N guidelines for N management in malting barley. In November 1998 two varieties of malting barley, Morex and Crystal, were planted at the Maricopa Agricultural Center. Five N rates (0, 60, 120, 180, and 240 lbs/acre) were applied in four split applications. Each treatment was replicated three times in a randomized complete block design. Samples were collected from lower stems at the 3-4 leaf 2 node, and flag leaf visible growth stages. Grain yields ranged from 1011 lbs/A to 2677 lbs/A for Morex and 827 lbs/A to 2641 lbs/A for Crystal. Grain protein ranged from 6.94 -11.5% (Morex) and 8.48-13.0% (Crystal). Correlation coefficients between stem NO₃-N and sap NO₃-N were 0.83 for Morex and 0.85 for Crystal. For Morex and Crystal, grain protein was within the malting industry grain protein range of 10.5-11.4% and yield was optimized at 180 lbs N/A. Sap NO₃ analysis can be a useful tool for determining N status of malting barley. |