Fertility investigations on the black earth wheatlands of the darling downs, queensland ii. Moisture and evapotranspiration in relation to the wheat crop

Waring S.A., Fox W.E. and Teakle L.J.H. (1958) Fertility investigations on the black earth wheatlands of the darling downs, queensland ii. Moisture and evapotranspiration in relation to the wheat crop. Australian Journal of Agricultural Research, 9 6: 717-729. doi:10.1071/AR9580717


Author Waring S.A.
Fox W.E.
Teakle L.J.H.
Title Fertility investigations on the black earth wheatlands of the darling downs, queensland ii. Moisture and evapotranspiration in relation to the wheat crop
Journal name Australian Journal of Agricultural Research   Check publisher's open access policy
ISSN 0004-9409
Publication date 1958
Sub-type Article (original research)
DOI 10.1071/AR9580717
Volume 9
Issue 6
Start page 717
End page 729
Total pages 13
Subject 1100 Agricultural and Biological Sciences
Abstract The effects on wheat yields of available soil moisture at planting, rainfall during the growing period, and évapotranspiration were examined for the years 1951-1954. The relation between free water surface evaporation, available soil moisture, and évapotranspiration was examined for the years 1951 and 1952. Wheat yields were found to be correlated with available soil moisture at planting for the four years combined, the two drier years combined (1951 and 1953), and the two wetter years combined (1952 and 1954). The relationship for the four years combined was sufficiently strong to suggest that available moisture at planting could be successfully used for yield prediction. Yield was correlated with évapotranspiration only for the dry year 1953. The ratio of yield to évapotranspiration was found to be lower for the years of high rainfall during the growing period, the mean values for the wet and dry years being 2. 1 and 3. 5 bus. /in. respectively. Growing-period rainfall was correlated with yield only for the month of August for the two dry years of 1951 and 1953 combined. Evapotranspiration (Etr) was found to be correlated with free water surface evaporation (JEW) and in the monthly data, the value for C in the relationship Etr=CEw 0.75being calculated as O'53. Available soil moisture was correlated with évapotranspiration using data from the beginning and end of the season in 1953, but was not correlated using monthly data. The method of calculating monthly available soil moisture is shown to be important in this correlation. A method of calculating available soil moisture over a monthly period, based on a mean daily figure for the month, is described.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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Created: Tue, 26 Jul 2016, 03:15:11 EST by System User