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dc.contributor.authorRiley, E. A.
dc.contributor.authorThompson, T. L.
dc.contributor.authorWhite, S. A.
dc.contributor.authorOttman, M. J.
dc.contributor.editorOttman, Michael J.en_US
dc.date.accessioned2012-02-01T19:46:55Z
dc.date.available2012-02-01T19:46:55Z
dc.date.issued1998-10
dc.identifier.urihttp://hdl.handle.net/10150/208274
dc.description.abstractMalting 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 1997 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 1765 lbs/A to 3439 lbs/A for Morex and 2104 lbs/A to 4274 lbs/A for Crystal. Grain protein ranged from 7.6- 10.5% (Morex) and 7.0- 10.7% (Crystal). Correlation coefficients between stem NO₃-N and sap NO₃-N were 0.80 for Morex and 0.84 for Crystal. For Morex and Crystal, grain protein was within the malting industry grain protein range of 10.5- 11.4% at 240 lbs N/A, and yield was optimized at 180 lbs N/A. Sap NO₃ analysis can be a useful tool for determining N status of malting barley. Stem NO₃-N concentrations at 180 lbs N/A were generally within the optimum range for NO₃-N in small grains.
dc.language.isoen_USen_US
dc.publisherCollege of Agriculture, University of Arizona (Tucson, AZ)en_US
dc.relation.ispartofseriesAZ1059en_US
dc.relation.ispartofseriesSeries P-114en_US
dc.subjectAgriculture -- Arizonaen_US
dc.subjectGrain -- Arizonaen_US
dc.subjectForage plants -- Arizonaen_US
dc.subjectBarley -- Arizonaen_US
dc.subjectWheat -- Arizonaen_US
dc.subjectBarley -- Fertilizer managementen_US
dc.subjectWheat -- Fertilizer managementen_US
dc.titleTissue Testing Guidelines for Nitrogen Management in Malting Barley, Maricopa, 1998en_US
dc.typetexten_US
dc.typeArticleen_US
dc.identifier.journalForage and Grain: A College of Agriculture Reporten_US
refterms.dateFOA2018-08-26T01:09:09Z
html.description.abstractMalting 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 1997 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 1765 lbs/A to 3439 lbs/A for Morex and 2104 lbs/A to 4274 lbs/A for Crystal. Grain protein ranged from 7.6- 10.5% (Morex) and 7.0- 10.7% (Crystal). Correlation coefficients between stem NO₃-N and sap NO₃-N were 0.80 for Morex and 0.84 for Crystal. For Morex and Crystal, grain protein was within the malting industry grain protein range of 10.5- 11.4% at 240 lbs N/A, and yield was optimized at 180 lbs N/A. Sap NO₃ analysis can be a useful tool for determining N status of malting barley. Stem NO₃-N concentrations at 180 lbs N/A were generally within the optimum range for NO₃-N in small grains.


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