Analysing the combined effect of wetted area and irrigation volume on olive tree transpiration using a SPAC model with a multi-compartment soil solution

2017 ◽  
Vol 35 (5) ◽  
pp. 409-423 ◽  
Author(s):  
Omar García-Tejera ◽  
Álvaro López-Bernal ◽  
Francisco Orgaz ◽  
Luca Testi ◽  
Francisco J. Villalobos
Keyword(s):  
Soil Solution ◽  
Olive Tree ◽  
Combined Effect ◽  
Tree Transpiration ◽  
Wetted Area ◽  
Irrigation Volume

scholarly journals Generating fuzzy rules by learning from olive tree transpiration measurement – An algorithm to automatize Granier sap flow data analysis

2014 ◽  
Vol 101 ◽  
pp. 1-10 ◽  
Author(s):  
J.M. Siqueira ◽  
T.A. Paço ◽  
J.C. Silvestre ◽  
F.L. Santos ◽  
A.O. Falcão ◽  
...  
Keyword(s):  
Data Analysis ◽  
Sap Flow ◽  
Olive Tree ◽  
Fuzzy Rules ◽  
Flow Data ◽  
Tree Transpiration

scholarly journals Modelling of water and energy exchanges over a sparse olive orchard in semi-arid areas

2020 ◽  
Author(s):  
Wafa Chebbi ◽  
Vincent Rivalland ◽  
Pascal Fanise ◽  
Aaron Boone ◽  
Lionel Jarlan ◽  
...  
Keyword(s):  
Large Fraction ◽  
Soil Column ◽  
Olive Tree ◽  
Bare Soil ◽  
Modeling Tools ◽  
Olive Orchard ◽  
Vegetation Fraction ◽  
Tree Transpiration ◽  
Svat Model ◽  
Hydrological Functioning

Abstract. In the Mediterranean basin, olive orchards occupy a large fraction of agricultural lands due to its sustainability to harsh conditions, drought in particular. Since most modeling tools to simulate vegetation functioning are not meant to represent very sparse crops (i.e., rainfed olive trees have a vegetation fraction cover ranging from 2 to 15 %), computing the water needs and the vulnerability to drought of an olive orchard is a challenge. There is indeed a very high contribution of the bare soil signal to the total fluxes, and it is difficult to decipher the contribution of the tree from that of the entire surface. In this context, in an attempt to study the olive tree hydrological functioning at field scale (38 ha), an experimental site was setup and a Soil–Vegetation–Atmosphere (SVAT) model has been applied. To represent the orchard soil–plant–atmosphere interactions, a simulation with default settings was assessed using parameters derived from both the literature and ground measurements. In this default configuration, neither the predicted actual nor the potential transpiration could reach the observed transpiration acquired during the wet season (R2 = 0.67, the Root Mean Square Error (RMSE) = 5.63 mm week−1). We show that the model fails to reproduce the relevant leaf surface that transpires. To address this issue and to improve the estimate of the year-to-year variability of the olive tree transpiration, we propose guidance on how a SVAT model can be modified to more appropriately represent the hydrological functioning of a sparse orchard. Once the tree transpiration is accurately simulated (R2 = 0.93, RMSE = 1.62 mm week−1), we evaluated whether the fully coupled (single patch) or a fully uncoupled (two patch) system better reproduced the total fluxes and their components. Owing to the independent characteristics of the soil columns inherent in the assumption of the 2-patch version, the bare soil column shows a deficiency if the topsoil root extraction is not accounted for. We deduced that we cannot accurately reproduce the soil evaporation in this configuration. This study open perspectives for a better representation of water fluxes over sparse tree crops into both hydrological and SVAT models.

238: Combined Effect of Apoptotic Biomarkers on Bladder Cancer Recurrence and Mortality after Radical Cystectomy

2007 ◽  
Vol 177 (4S) ◽  
pp. 79-80
Author(s):  
Jose A. Karam ◽  
Yair Lotan ◽  
Raheela Ashfaq ◽  
Claus G. Roehrborn ◽  
Arthur I. Sagalowsky ◽  
...  
Keyword(s):  
Bladder Cancer ◽  
Radical Cystectomy ◽  
Cancer Recurrence ◽  
Combined Effect ◽  
Bladder Cancer Recurrence

Combined Effect of Doxorubicin with MODEL26 peptide

Planta Medica ◽  
2008 ◽  
Vol 74 (09) ◽  
Author(s):  
WG Shin ◽  
BJ Lee
Keyword(s):  
Combined Effect

Olive tree extracts with potential leishmanicidal activity

Planta Medica ◽  
2008 ◽  
Vol 74 (09) ◽  
Author(s):  
ID Kyriazis ◽  
E Karagouni ◽  
K Soteriadou ◽  
AL Skaltsounis ◽  
E Dotsika
Keyword(s):  
Olive Tree ◽  
Leishmanicidal Activity

SOIL WATER CONTENT AFFECTS THE AVAILABILITY OF PHOSPHATE

1985 ◽  
pp. 185-189
Author(s):  
M.C.H.Mouat Pieter Nes
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Soil Solution ◽  
Equivalent Reduction

Reduction in water content of a soil increased the concentration of ammonium and nitrate in solution, but had no effect on the concentration of phosphate. The corresponding reduction in the quantity of phosphate in solution caused an equivalent reduction in the response of ryegrass to applied phosphate. Keywords: soil solution, soil water content, phosphate, ryegrass, nutrition.

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