Some Effects of Furrow Spacing and Depth on Soil Moisture in Central Australia

1963 ◽  
Vol 16 (3) ◽  
pp. 138
Author(s):  
R. E. Winkworth
Keyword(s):  
Soil Moisture ◽  
Central Australia

scholarly journals Aerodynamic Resistance and Penman–Monteith Evapotranspiration over a Seasonally Two-Layered Canopy in Semiarid Central Australia

2013 ◽  
Vol 14 (5) ◽  
pp. 1562-1570 ◽  
Author(s):  
James Cleverly ◽  
Chao Chen ◽  
Nicolas Boulain ◽  
Randol Villalobos-Vega ◽  
Ralph Faux ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Drag Coefficient ◽  
Vapor Pressure Deficit ◽  
Soil Moisture Content ◽  
Aerodynamic Resistance ◽  
Atmospheric Humidity ◽  
Vapor Transfer ◽  
Central Australia ◽  
Content Information

Abstract Accurate prediction of evapotranspiration E depends upon representative characterization of meteorological conditions in the boundary layer. Drag and bulk transfer coefficient schemes for estimating aerodynamic resistance to vapor transfer were compared over a semiarid natural woodland ecosystem in central Australia. Aerodynamic resistance was overestimated from the drag coefficient, resulting in limited E at intermediate values of vapor pressure deficit. Large vertical humidity gradients were present during the summer, causing divergence between momentum and vapor transport within and above the canopy surface. Because of intermittency in growth of the summer-active, rain-dependent understory and physiological responses of the canopy, leaf resistance varied from less than 50 s m−1 to greater than 106 s m−1, in which the particularly large values were obtained from inversion of drag coefficient resistance. Soil moisture limitations further contributed to divergence between actual and reference E. Unsurprisingly, inclusion of site-specific meteorological (e.g., vertical humidity gradients) and hydrological (e.g., soil moisture content) information improved the accuracy of predicting E when applying Penman–Monteith analysis. These results apply regardless of canopy layering (i.e., even when the understory was not present) wherever atmospheric humidity gradients develop and are thus not restricted to two-layer canopies in semiarid regions.

Effects of rainfall and simulated browsing on the growth of Acacia georginae (F.M. Bailey) in arid central Australia.

1990 ◽  
Vol 12 (2) ◽  
pp. 79 ◽  
Author(s):  
DF Robinson ◽  
JR Maconochie ◽  
PJ Hanna
Keyword(s):  
Soil Moisture ◽  
Leaf Growth ◽  
Growth Patterns ◽  
Subsequent Growth ◽  
Leafy Shoots ◽  
Central Australia ◽  
Simulated Browsing

Leafy shoots of Acacia georginae were subjected to different combinations of pruning and defoliation, and their subsequent growth patterns recorded over two and a half years. Rainfall and soil moisture records were also kept. Rainfall, soil moisture, new growth and old leaf loss showed variable patterns from year to year and generally were not strongly related to each other. Light pruning was followed by increased leaf growth, with apparent stimulation, whereas heavy pruning and defoliation appeared to be detrimental to growth, mainly in that removed growth was not replaced. Actual inhibition could not be established.

PROTOTIPE APLIKASI PENYIRAMAN TANAMAN MENGGUNAKAN SENSOR KELEMBABAN TANAH BERBASIS MICRO CONTOLLER ATMEGA 328

2019 ◽  
Vol 5 (1) ◽  
pp. 97-106
Author(s):  
Rudi Budi Agung ◽  
Muhammad Nur ◽  
Didi Sukayadi
Keyword(s):  
Soil Moisture ◽  
Growth And Development ◽  
Large Scale ◽  
Simple Method ◽  
Moisture Sensor ◽  
Sensor Development ◽  
Soil Moisture Sensor ◽  
Application Systems ◽  
Harvesting Systems ◽  
Working Principle

The Indonesian country which is famous for its tropical climate has now experienced a shift in two seasons (dry season and rainy season). This has an impact on cropping and harvesting systems among farmers. In large scale this is very influential considering that farmers in Indonesia are stilldependent on rainfall which results in soil moisture. Some types of plants that are very dependent on soil moisture will greatly require rainfall or water for growth and development. Through this research, researchers tried to make a prototype application for watering plants using ATMEGA328 microcontroller based soil moisture sensor. Development of application systems using the prototype method as a simple method which is the first step and can be developed again for large scale. The working principle of this prototype is simply that when soil moisture reaches a certainthreshold (above 56%) then the system will work by activating the watering system, if it is below 56% the system does not work or in other words soil moisture is considered sufficient for certain plant needs.

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