scholarly journals Implementation of a Root Water Extraction Module in CATHY: Comparison of Four Empirical Root-density Distribution Models

2013 ◽  
Vol 19 ◽  
pp. 57-66 ◽  
Author(s):  
Mushombe Muma ◽  
Silvio J. Gumiere ◽  
Alain N. Rousseau ◽  
Carlotta Scudeler ◽  
Claudio Paniconi
Keyword(s):  
Density Distribution ◽  
Root Density ◽  
Water Extraction ◽  
Distribution Models ◽  
Root Water Extraction

scholarly journals Estimating the Contribution of Groundwater to the Root Zone of Winter Wheat Using Root Density Distribution Functions

2018 ◽  
Vol 17 (1) ◽  
pp. 170075 ◽  
Author(s):  
Yonghua Zhu ◽  
Liliang Ren ◽  
Robert Horton ◽  
Haishen Lü ◽  
Zhenlong Wang ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Density Distribution ◽  
Root Zone ◽  
Distribution Functions ◽  
Root Density

scholarly journals Mathematical Description of Rooting Profiles of Agricultural Crops and its Effect on Transpiration Prediction by a Hydrological Model

Soil Systems ◽  
2019 ◽  
Vol 3 (3) ◽  
pp. 44 ◽  
Author(s):  
Metselaar ◽  
Pinheiro ◽  
Lier
Keyword(s):  
Density Distribution ◽  
Root Length ◽  
Hydrological Modeling ◽  
Hydrological Model ◽  
Root Length Density ◽  
Relative Yield ◽  
Root Density ◽  
Soil Water Storage ◽  
Agricultural Crops ◽  
Density Profiles

The geometry of rooting systems is important for modeling water flows in the soil-plant-atmosphere continuum. Measured information about root density can be summarized in adjustable equations applied in hydrological models. We present such descriptive functions used to model root density distribution over depth and evaluate their quality of fit to measured crop root density profiles retrieved from the literature. An equation is presented to calculate the mean root half-distance as a function of depth from root length density profiles as used in single root models for water uptake. To assess the importance of the shape of the root length density profile in hydrological modeling, the sensitivity of actual transpiration predictions of a hydrological model to the shape of root length density profiles is analyzed using 38 years of meteorological data from Southeast Brazil. The cumulative root density distributions covering the most important agricultural crops (in terms of area) were found to be well described by the logistic function or the Gompertz function. Root length density distribution has a consistent effect on relative transpiration, hence on relative yield, but the common approach to predict transpiration reduction and irrigation requirement from soil water storage or average water content is shown to be only partially supported by simulation results.

Quantifying root water extraction by rangeland plants through soil water modeling

2010 ◽  
Vol 335 (1-2) ◽  
pp. 181-198 ◽  
Author(s):  
Xuejun Dong ◽  
Bob D. Patton ◽  
Anne C. Nyren ◽  
Paul E. Nyren ◽  
Lyle D. Prunty
Keyword(s):  
Soil Water ◽  
Water Extraction ◽  
Water Modeling ◽  
Root Water Extraction ◽  
Rangeland Plants

scholarly journals Sensor placement for soil water monitoring in lemon irrigated by micro sprinkler

2007 ◽  
Vol 11 (1) ◽  
pp. 46-52 ◽  
Author(s):  
Eugênio F. Coelho ◽  
Delfran B. dos Santos ◽  
Carlos A. V. de Azevedo
Keyword(s):  
Water Potential ◽  
Water Content ◽  
Soil Water ◽  
Root Length ◽  
Sensor Placement ◽  
Soil Water Potential ◽  
Water Extraction ◽  
Soil Profiles ◽  
Water Sensor ◽  
Root Water Extraction

This research had as its objective the investigation of an alternative strategy for soil sensor placement to be used in citrus orchards irrigated by micro sprinkler. An experiment was carried out in a Tahiti lemon orchard under three irrigation intervals of 1, 2 and 3 days. Soil water potential, soil water content distribution and root water extraction were monitored by a time-domain-reflectometry (TDR) in several positions in soil profiles radial to the trees. Root length and root length density were determined from digital root images at the same positions in the soil profiles where water content was monitored. Results showed the importance of considering root water extraction in the definition of soil water sensor placement. The profile regions for soil water sensor placement should correspond to the intersection of the region containing at least 80% of total root length and the region of at least 80% of total water extraction. In case of tensiometers, the region of soil water potential above -80 kPa should be included in the intersection.

ON THE SIMULATION OF ROOT WATER EXTRACTION: EXAMINATION OF A MINIMUM ENERGY HYPOTHESIS

Soil Science ◽  
2000 ◽  
Vol 165 (3) ◽  
pp. 226-236 ◽  
Author(s):  
S. G. K. Adiku ◽  
C. W. Rose ◽  
R. D. Braddock ◽  
H. Ozier-Lafontaine
Keyword(s):  
Minimum Energy ◽  
Water Extraction ◽  
Root Water Extraction

Evaluation of normalized root length density distribution models

2019 ◽  
Vol 242 ◽  
pp. 107604 ◽  
Author(s):  
Songrui Ning ◽  
Chong Chen ◽  
Beibei Zhou ◽  
Quanjiu Wang
Keyword(s):  
Density Distribution ◽  
Root Length ◽  
Root Length Density ◽  
Distribution Models
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