Persistent Link:
http://hdl.handle.net/10150/202435
Title:
Influence of Nitrogen Fertilizer Applied in Winter on Alfalfa Yield at the First Cutting in Spring
Author:
Knowles, Tim C.; Ottman, Michael J.; Wakimoto, Victor
Issue Date:
Oct-1996
Publisher:
College of Agriculture, University of Arizona (Tucson, AZ)
Journal:
Forage and Grain: A College of Agriculture Report
Abstract:
Some growers feel that nitrogen (N) fixing nodules found on the roots of the alfalfa plant are ineffective in cold soil during the winter and early spring. Thus, starter N fertilizer is commonly applied in late winter to established alfalfa to enhance growth until spring when the soil warms up and alfalfa begins actively fixing atmospheric N₂. Established alfalfa normally does not benefit from applications of N fertilizer since it is a leguminous crop that is capable of fixing its own N from atmospheric N₂. Afield experiment was conducted to determine the effect of N fertilizer applied in winter on alfalfa hay yield at the first cutting in spring. Two treatments consisted of an unfertilized check plot and UAN 32 water run at a rate of 35 lbs. N/acre to three year old 'CVF 101' alfalfa grown on a silt loam soil testing deficient in nitrate-N. Maximum alfalfa hay yield (J ton/acre) was obtained at the first spring cutting without N fertilizer application. However, since the field has a known yield potential of 1.5 ton/acre, factors other than fertility influenced the alfalfa hay yields observed in this study.
Keywords:
Agriculture -- Arizona; Grain -- Arizona; Forage plants -- Arizona; Forages -- Arizona; Forages -- Herbicides; Forages -- Growth regulators; Forages -- Fertilizers
Series/Report no.:
370106; Series P-106

Full metadata record

DC FieldValue Language
dc.titleInfluence of Nitrogen Fertilizer Applied in Winter on Alfalfa Yield at the First Cutting in Springen_US
dc.contributor.authorKnowles, Tim C.en_US
dc.contributor.authorOttman, Michael J.en_US
dc.contributor.authorWakimoto, Victoren_US
dc.date.issued1996-10-
dc.publisherCollege of Agriculture, University of Arizona (Tucson, AZ)en_US
dc.identifier.journalForage and Grain: A College of Agriculture Reporten_US
dc.description.abstractSome growers feel that nitrogen (N) fixing nodules found on the roots of the alfalfa plant are ineffective in cold soil during the winter and early spring. Thus, starter N fertilizer is commonly applied in late winter to established alfalfa to enhance growth until spring when the soil warms up and alfalfa begins actively fixing atmospheric N₂. Established alfalfa normally does not benefit from applications of N fertilizer since it is a leguminous crop that is capable of fixing its own N from atmospheric N₂. Afield experiment was conducted to determine the effect of N fertilizer applied in winter on alfalfa hay yield at the first cutting in spring. Two treatments consisted of an unfertilized check plot and UAN 32 water run at a rate of 35 lbs. N/acre to three year old 'CVF 101' alfalfa grown on a silt loam soil testing deficient in nitrate-N. Maximum alfalfa hay yield (J ton/acre) was obtained at the first spring cutting without N fertilizer application. However, since the field has a known yield potential of 1.5 ton/acre, factors other than fertility influenced the alfalfa hay yields observed in this study.en_US
dc.subjectAgriculture -- Arizonaen_US
dc.subjectGrain -- Arizonaen_US
dc.subjectForage plants -- Arizonaen_US
dc.subjectForages -- Arizonaen_US
dc.subjectForages -- Herbicidesen_US
dc.subjectForages -- Growth regulatorsen_US
dc.subjectForages -- Fertilizersen_US
dc.identifier.urihttp://hdl.handle.net/10150/202435-
dc.relation.ispartofseries370106en_US
dc.relation.ispartofseriesSeries P-106en_US
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