Soil heat flux in the penman-monteith evapotranspiration equation

dc.contributor.author	Anadranistakis, M	en
dc.contributor.author	Liakatas, A	en
dc.contributor.author	Alexandris, S	en
dc.contributor.author	Aggelides, S	en
dc.contributor.author	Kerkides, P	en
dc.contributor.author	Rizos, S	en
dc.contributor.author	Poulovassilis, A	en
dc.date.accessioned	2014-06-06T06:43:15Z
dc.date.available	2014-06-06T06:43:15Z
dc.date.issued	1997	en
dc.identifier.issn	05677572	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/1130
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-84879448435&partnerID=40&md5=769f1376e3bc6e8ae96b19e44b71940a	en
dc.subject	Extinction coefficient	en
dc.subject	Leaf area index	en
dc.subject	Net radiation	en
dc.title	Soil heat flux in the penman-monteith evapotranspiration equation	en
heal.type	conferenceItem	en
heal.publicationDate	1997	en
heal.abstract	Some reliable evapotranspiration-estimating methods, like Penman-Monteith's (Monteith, 1973), require knowledge of the available energy expressed by the difference between net radiation (RN) and soil heat flux (G). G is considered as either zero or portion of RN, changing with the crop development and, thus, with the leaf area index (L). Establishment of a relationship between G/RN and L is attempted here both for day and night time during the development of a crop, under varying soil moisture regimes. A reliable exponential relation between the two parameters, applicable for crops with varying geometry and architecture of canopy, is proposed for day time. With L approaching zero, G/RN tends to the value 0.43, whereas for large L, the ratio approaches its limit value 0.1 . At night, G/R N and L are related linearly for L>2, but for smaller values of L, G approaches RN. © ISHS.	en
heal.journalName	Acta Horticulturae	en
dc.identifier.volume	449	en
dc.identifier.spage	69	en
dc.identifier.epage	74	en