Now showing items 1-10 of 29
The long-term measurement of total evaporation over Acacia mearnsii using large aperture scintillometry
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 ...
Estimating solar radiation for water-use and yield simulations under present and projected future climate using Cropsyst.
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
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 ...
Varying levels of incident solar irradiance and microclimatic variations on banana (Musa spp) growth and productivity.
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 ...
Seasonal variation of surface energy fluxes above a mixed species and spatially homogeneous grassland.
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 ...
Modelling the impacts of increased air temperature on maize yields in selected areas of the South African highveld using the cropsyst model.
Abstract available in PDF file.
The use of infrared thermometry for irrigation scheduling of cereal rye (Secale cereale L.) and annual ryegrass (Lolium multiflorum Lam.)
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 ...
Heat and energy exchange above different surfaces using surface renewal.
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 ...
Measurement of water potential using thermocouple hygrometers.
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 ...
Modelling the soil water balance and applications using a decision support system (DSSAT v3.5).
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 ...