Modelling a Transition from Purebred Romney to Fully Shedding Wiltshire-Romney Crossbred

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dc.citation.issue11
dc.citation.volume10
dc.contributor.authorFarrell LJ
dc.contributor.authorMorris ST
dc.contributor.authorKenyon PR
dc.contributor.authorTozer PR
dc.date.available2020-11
dc.date.available2020-11-05
dc.date.issued7/11/2020
dc.description.abstractConsidering the current low prices for coarse wool (fibre diameter > 30 µm), a grading up transition to a shedding flock may eliminate wool harvesting costs and increase sheep farm profit. This transition could be achieved by breeding non-shedding ewes with Wiltshire rams. A bio-economic system-dynamics model of a pastoral sheep farming enterprise was used to simulate this grading up transition from 2580 Romney ewes to a similarly-sized flock of fully shedding third or fourth cross Wiltshire-Romney ewes. The total annual sheep feed demand was constrained within a ±5% range to minimise disruption to the on-farm beef cattle enterprise. Wool harvesting expenses were eliminated after seven years of transition, and with reduced feed demand for wool growth, the post-transition shedding flocks had more ewes producing more lambs and achieving greater annual profit compared with the base Romney flock. The net present values of transition were 7% higher than the maintenance of the base Romney flock with a farmgate wool price of $2.15/kg. Results suggest that coarse wool-producing farmers should consider a grading up transition to a shedding flock, and the collection of data on the production of Wiltshire-Romney sheep in New Zealand would improve the accuracy of model predictions.
dc.description.publication-statusPublished
dc.identifierhttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000592968700001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=c5bb3b2499afac691c2e3c1a83ef6fef
dc.identifierARTN 2066
dc.identifier.citationANIMALS, 2020, 10 (11)
dc.identifier.doi10.3390/ani10112066
dc.identifier.elements-id435846
dc.identifier.harvestedMassey_Dark
dc.identifier.issn2076-2615
dc.identifier.urihttps://hdl.handle.net/10179/15883
dc.publisherMDPI (Basel, Switzerland)
dc.relation.isPartOfANIMALS
dc.subjectNew Zealand
dc.subjectprofit
dc.subjectbio-economic
dc.subjectsystem-dynamics
dc.subjectwool
dc.subjectcashflow
dc.subjectflock dynamics
dc.subjectgrading up
dc.subjectewes
dc.subjectsheep
dc.subject.anzsrc0502 Environmental Science and Management
dc.subject.anzsrc0608 Zoology
dc.subject.anzsrc0702 Animal Production
dc.titleModelling a Transition from Purebred Romney to Fully Shedding Wiltshire-Romney Crossbred
dc.typeJournal article
pubs.notesNot known
pubs.organisational-group/Massey University
pubs.organisational-group/Massey University/College of Sciences
pubs.organisational-group/Massey University/College of Sciences/School of Agriculture & Environment
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