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dc.contributor.authorJaggard, K. W.
dc.contributor.authorKoch, H-J
dc.contributor.authorSanz, J. M. Arroyo
dc.contributor.authorCattanach, A.
dc.contributor.authorDuval, R.
dc.contributor.authorEigner, H.
dc.contributor.authorLegrand, G.
dc.contributor.authorOlsson, R.
dc.contributor.authorQi, Aiming
dc.contributor.authorThomsen, J. N.
dc.contributor.authorVan Swaaji, N
dc.contributor.authorMinerva, N.
dc.date.accessioned2014-11-12T09:59:27Z
dc.date.available2014-11-12T09:59:27Z
dc.date.issued2012
dc.identifier.citationJaggard , K W , Koch , H-J , Sanz , J M A , Cattanach , A , Duval , R , Eigner , H , Legrand , G , Olsson , R , Qi , A , Thomsen , J N , Van Swaaji , N & Minerva , N 2012 , ' The yield gap in some beet producing countries ' Paper presented at 73rd IIRB Congress , Brussells , Belgium , 14/02/12 - 15/02/12 , pp. 9-14 .
dc.identifier.citationconference
dc.identifier.otherPURE: 7743845
dc.identifier.otherPURE UUID: b203acc6-773b-4c8a-91fc-ebe11143deb8
dc.identifier.urihttp://hdl.handle.net/2299/14734
dc.description.abstractThe efficiency of an arable crop production system can be expressed as the yield gap, defining the difference between the potential and the actual yield; the larger the gap the less efficient the system. One way to assess the yield gap for sugar beet production is to compare the delivered yield with the yield produced without any farmer-imposed constraint, where the yield of the crop is limited only by the availability of heat, sunlight and water. Official trials designed to produce lists of recommended varieties usually suffer few if any constraints. The Plant and Soil Group of IIRB have collected national yield and recommended variety performance data for a range of beet producing countries over the last decade. These data show that yields are increasing in all countries, some more rapidly than others. They also show that the yield gap is stable in most countries while it is getting wider in others. It is only in the USA that the agronomy seems to be getting more efficient. These results will be discussed in relation to the protocols used for the variety trials and in relation to national yield statisticsen
dc.language.isoeng
dc.relation.ispartof
dc.titleThe yield gap in some beet producing countriesen
dc.contributor.institutionSchool of Life and Medical Sciences
dc.contributor.institutionDepartment of Human and Environmental Sciences
dc.contributor.institutionHealth & Human Sciences Research Institute
dc.contributor.institutionAgriculture, Veterinary and Food Sciences
dc.contributor.institutionGeography, Environment and Agriculture
dc.contributor.institutionCrop and Environmental Protection
dc.description.statusNon peer reviewed
dc.relation.schoolSchool of Life and Medical Sciences
rioxxterms.typeOther
herts.preservation.rarelyaccessedtrue
herts.rights.accesstyperestrictedAccess


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