Browsing Agrometeorology by Issue Date
Now showing items 1-20 of 33
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Measurement of water potential using thermocouple hygrometers.
(1982)Theory predicts that the time dependent voltage curve of a thermocouple psychrometer where there is no change in output voltage with time during the evaporation cycle defines the wet bulb temperature T[w] corresponding ... -
Comparative evaporation measurements above commercial forestry and sugarcane canopies in the KwaZulu-Natal Midlands.
(1999)An understanding of the water use of different crops commonly grown in an area is essential for the implementation of integrated catchment management in South Africa. With increasing pressure on water resources, mainly ... -
Varying levels of incident solar irradiance and microclimatic variations on banana (Musa spp) growth and productivity.
(2001)A field experiment was conducted at Inselele, KwaZulu-Natal South Coast, South Africa, in 1999/2000, to assess the influence of shading as related to varying levels of incident solar irradiance as well as microclimatic ... -
Estimating solar radiation for water-use and yield simulations under present and projected future climate using Cropsyst.
(2003)Agricultural scientists are faced with the challenge of producing enough food for the increasing world population. Hence the need to develop tools for managing soil and plant systems to increase food production in order ... -
Estimation of reference evaporation and comparison with ET-gage evaporimeter
(2003)Accurate estimation of reference evaporation is necessary for the estimation of actual evaporation for irrigation and water resource management purposes. Estimation of reference evaporati~n using the Penman-Monteith method ... -
The use of infrared thermometry for irrigation scheduling of cereal rye (Secale cereale L.) and annual ryegrass (Lolium multiflorum Lam.)
(2003)Limited water supplies are available to satisfy the increasing demands of crop production. It is therefore very important to conserve the water, which comes as rainfall, and water, which is used in irrigation. A proper ... -
Modelling the soil water balance and applications using a decision support system (DSSAT v3.5).
(2003)Water is a scarce resource used by various stakeholders. Agriculture is one of the users of this resource especially for growing plants. Plants need to take up carbon dioxide to prepare their own food. For this purpose ... -
Potential for using trees to limit the ingress of water into mine workings : a comparison of total evaporation and soil water relations for eucalyptus and grassland .
(2003)Current mining methods used to extract coal from underground mine workings disturb the natural environment and the existing stable geological structures. As a result, the ingress of water into the mines increases and the ... -
Frequency domain reflectometry for irrigation scheduling of cover crops.
(2003)A well-managed irrigation scheduling system needs a rapid, preCIse, simple, costeffective and non-destructive soil water content sensor. The PRl profile probe and Diviner 2000 were used to determine the timing and amount ... -
Modeling variety differences in canopy growth and development of sugarcane (Saccharum officinarum L.) using Canegro.
(2003)Crop models have great potential as research tools, for crop system management and policy analysis. One of the most promising future uses of crop models is in crop improvement. The limitation in the use of models for crop ... -
Long-term measurements of spatially-averaged sensible heat flux for a mixed grassland community, using surface layer scintillometry.
(2007)Evapotransipration by vegetation cover is an important component of the water budget and energy balance in any ecosystem. A key to more improved water management therefore lies in improving our understanding of ... -
The long-term measurement of total evaporation over Acacia mearnsii using large aperture scintillometry
(2007)A large aperture scintillometer (LAS) was operated continuously over a distance of 575 m from 19 August 2006 to 29 September 2007 in the South African KwaZulu-Natal midlands mistbelt area over Wattle (Acacia mearnsii). The ... -
Heat and energy exchange above different surfaces using surface renewal.
(2008)The demand for the world’s increasingly scarce water supply is rising rapidly, challenging its availability for agriculture and other environmental uses, especially in water scarce countries, such as South Africa, with ... -
Sensible heat flux under unstable conditions for sugarcane using temperature variance and surface renewal.
(2010)Increased pressure on the available limited water resources for agricultural production has a significant impact on sugarcane production. Routine monitoring of evaporation with reliable accuracy is essential for irrigation ... -
Sensible heat flux and evaporation for sparse vegetation using temperature-variance and a dual-source model.
(2010)The high population growth rate and rapid urbanization that the world is experiencing today has aggravated the competition for the already scarce resource ¡V water ¡V between the agricultural sector and the other economic ... -
Sensible heat flux for estimating evaporation.
(2010)The focus of the research is on investigations of various methods for obtaining sensible heat flux (H) for estimating evaporation. The key for this approach is the application of the shortened energy balance equation, and ... -
Seasonal variation of surface energy fluxes above a mixed species and spatially homogeneous grassland.
(2011)The increasing human population, industrialization, urbanisation and climate change challenges have resulted in an increased demand for already scarce water resources. This has left the agricultural sector with less water ... -
Monitoring fire danger in near real-time using field-based agrometeorological measurement systems.
(2014)Africa has been termed the ‘Fire Continent’ due to its high annual fire frequency. Wildfires are considered one of the most common disasters in South Africa resulting in a high number of human fatalities and financial loss ... -
Web-based teaching, learning and research using real-time data from field-based agrometeorological measurement systems.
(2014)Abstract available in PDF file. -
Modelling the impacts of increased air temperature on maize yields in selected areas of the South African highveld using the cropsyst model.
(2014)Abstract available in PDF file.