scholarly journals Feral horses influence both spatial and temporal patterns of water use by native ungulates in a semi‐arid environment

Ecosphere ◽  
2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Lucas K. Hall ◽  
Randy T. Larsen ◽  
Robert N. Knight ◽  
Brock R. McMillan
Keyword(s):  
Water Use ◽  
Temporal Patterns ◽  
Arid Environment ◽  
Spatial And Temporal Patterns ◽  
Feral Horses ◽  
Semi Arid

Deficit irrigation improves maize yield and water use efficiency in a semi-arid environment

2021 ◽  
Vol 243 ◽  
pp. 106483 ◽  
Author(s):  
Yufeng Zou ◽  
Qaisar Saddique ◽  
Ajaz Ali ◽  
Jiatun Xu ◽  
Muhammad Imran Khan ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Deficit Irrigation ◽  
Maize Yield ◽  
Arid Environment ◽  
Use Efficiency ◽  
Semi Arid

Groundwater use by dominant tree species in tropical remnant vegetation communities

2006 ◽  
Vol 54 (2) ◽  
pp. 155 ◽  
Author(s):  
A. P. O'Grady ◽  
P. G. Cook ◽  
P. Howe ◽  
G. Werren
Keyword(s):  
Soil Water ◽  
Water Use ◽  
Tree Species ◽  
Temporal Patterns ◽  
Terrestrial Vegetation ◽  
Spatial And Temporal Patterns ◽  
Groundwater Use ◽  
Vegetation Communities ◽  
Remnant Vegetation ◽  
Water Potential Measurements

Defining groundwater dependence and water-use requirements of terrestrial vegetation represents a significant challenge to water-resources managers. Terrestrial vegetation may exhibit complex spatial and temporal patterns of groundwater dependence. In this study we have assessed the sources of water used by dominant tree species in remnant vegetation of Pioneer Valley, Mackay, in northern Queensland. Water use by tree species was determined by sapflow techniques and the sources of water were investigated by using a combination of isotopic and water-potential measurements. Within the remnant vegetation communities of the Pioneer Valley there were complex patterns of water use and water-resource partitioning. However, all communities within the study showed some degree of groundwater use. Riparian communities that were reliant on groundwater discharge for maintenance of river baseflow exhibited high species diversity and complex forest structure and different species within these communities accessed a range of water sources including shallow soil water, river water and groundwater. In contrast, the woodlands and open forest were principally reliant on soil water. Although, species such as Corymbia clarksoniana appeared to be reliant on groundwater for their dry-season water-use requirements. This study demonstrated use of groundwater by remnant vegetation communities in the Pioneer Valley but determination of groundwater dependence requires a better understanding of the temporal patterns of water use and sources of water used by each species.

Effect of date and final irrigation on yield and yield components of sunflowers in a semi-arid environment

1977 ◽  
Vol 17 (86) ◽  
pp. 482 ◽  
Author(s):  
CL Browne
Keyword(s):  
Water Use ◽  
Seed Yield ◽  
Yield Components ◽  
Seed Weight ◽  
Arid Environment ◽  
Irrigation Season ◽  
Yield And Yield Components ◽  
Dry Climates ◽  
Total Oil ◽  
Semi Arid

In the semi-arid irrigation areas of south-western New South Wales, many sunflower crops receive no irrigation after flowering. In these dry climates, such premature termination of irrigation could be leading to substantial yield losses. The effect of date of final irrigation on yield and yield components of sunflowers (cv. VNIIMK 6540) was thus examined in two experiments. In the first experiment, seed yield was increased by 19 per cent when final irrigation was applied 22 days after mid-flowering, rather than at mid-flowering. The higher yield resulted principally from an increase in the number of harvestable seeds. Higher frequency of irrigation further increased seed yield by 9 per cent via increase in seed weight. Estimated total consumptive water use by treatments ranged from 546 to 677 mm and the regression of yield (kg ha-1) on water use (mm) was y = 3.9x - 47.4 (r = 0.77, P < 0.001). In the second experiment, in which all treatments were irrigated at a high frequency, seed yield was increased by 30 per cent and total oil yield by 48 per cent when final irrigation was applied 16 days after mid-flowering, rather than at mid-flowering. Both seed weight and seed number were increased by the later irrigation. No further yield improvement was achieved by extending the irrigation season to encompass physiological maturity (a mean 31 days after mid-flowering).

scholarly journals Response of wheat growth, grain yield and water use to elevated CO 2 under a Free‐Air CO 2 Enrichment ( FACE ) experiment and modelling in a semi‐arid environment

2015 ◽  
Vol 21 (7) ◽  
pp. 2670-2686 ◽  
Author(s):  
Garry J. O'Leary ◽  
Brendan Christy ◽  
James Nuttall ◽  
Neil Huth ◽  
Davide Cammarano ◽  
...  
Keyword(s):  
Grain Yield ◽  
Water Use ◽  
Arid Environment ◽  
Wheat Growth ◽  
Free Air ◽  
Face Experiment ◽  
Semi Arid

scholarly journals Effect of weather on yield, heat and water use efficiency of wheat crop in a semi-arid environment

2021 ◽  
Vol 21 (1) ◽  
pp. 89-92
Author(s):  
RACHANA DUBEY ◽  
HIMANSHU PATHAK ◽  
SANATAN PRADHAN ◽  
BIDISHA CHAKRABARTI ◽  
N. MANIKANDAN
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Arid Environment ◽  
Wheat Crop ◽  
Use Efficiency ◽  
Semi Arid

scholarly journals Spatial and temporal patterns of herbaceous primary production in semi-arid shrublands: a remote sensing approach

2016 ◽  
Vol 27 (4) ◽  
pp. 716-727 ◽  
Author(s):  
Lisandro J. Blanco ◽  
José M. Paruelo ◽  
Martín Oesterheld ◽  
Fernando N. Biurrun
Keyword(s):  
Remote Sensing ◽  
Primary Production ◽  
Temporal Patterns ◽  
Spatial And Temporal Patterns ◽  
Arid Shrublands ◽  
Semi Arid
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