Browsing Research Articles (Plant Production and Soil Science) by UP Author "Annandale, John George"
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Browsing Research Articles (Plant Production and Soil Science) by UP Author "Annandale, John George"
Now showing items 1-20 of 47
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Taylor, N.J. (Nicolette); Annandale, John George; Ibraimo, N.A.; Steyn, Joachim Marthinus; Gush, M.B. (International Society for Horticultural Science, 2017-01)The accurate estimation of evapotranspiration (ET) of orchard crops is critical for judicious irrigation water management and planning. However, it is impossible to measure ET under all possible combinations of climate and ...
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Idowu, O.A.; Lorentz, Simon A.; Annandale, John George; McCartney, M.P.; Jovanovic, Nebo (Springer, 2007)Low-quality mine water from collieries may be used in large quantities to irrigate agricultural crops on virgin (unmined) and rehabilitated soils in South Africa. Such a use could enhance crop production and allow ...
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Swanepoel, C.M.; Rötter, R.P.; Van der Laan, Michael; Annandale, John George; Beukes, D.J.; Du Preez, C.C.; Swanepoel, L.H.; Van der Merwe, A.; Hoffmann, M.P. (Elsevier, 2018-11)Conservation agriculture (CA), with reduced tillage, permanent soil cover and diversified cropping systems, is advocated in southern Africa to improve soil quality, reduce input costs and mitigate climate-induced risks. ...
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Ghezehei, Solomon Beyene; Everson, Colin Stuart; Annandale, John George (Elsevier, 2015-03)The potential of tree spacing/arrangement to alleviate effects of interspecific competition of hedgerow intercropping systems on productivity and response to pruning of Jatropha curcas (Jatropha) was investigated using ...
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Idowu, O.A.; Lorentz, Simon A.; Annandale, John George; Aken, Mark Ernest; McCartney, M.P.; Thornton-Dibb, S.L.C.; Westhuizen, A. (Water Research Council, 2010-10)The ACRU agrohydrological model, in the form of ACRU2000 and its salinity module, ACRUSalinity, was employed in catchment-scale assessment of widespread irrigation with low quality mine-water in undisturbed (un-mined) and ...
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Geremew, Eticha Birdo; Steyn, Joachim Marthinus; Annandale, John George (South African Society of Crop Production/ Soil Science Society of South Africa/ Southern African Weed Science Society/ Southern African Society for Horticultural Sciences, 2008)Traditional irrigation schemes constitute about 40% of the total irrigated land in Ethiopia. Despite this, the sector has been overlooked and not supported by improved water management technologies. A survey conducted on ...
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Adhanom, G.T.; Stirzaker, Richard John; Lorentz, Simon A.; Annandale, John George; Steyn, Joachim Marthinus (Water Research Council, 2012-01)The design of passive lysimeters or wetting front detectors determines the tensions at which they collect a water sample from an unsaturated soil. When deployed in the field to help manage irrigation, it is necessary to ...
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Hendriks, Sheryl L.; Viljoen, A.; Marais, Diana; Wenhold, Friedeburg Anna Maria; McIntyre, Angela Margret; Ngidi, Mjabuliseni S.; Annandale, John George; Kalaba, Mmatlou W.; Stewart, D. (BioMed Central, 2020-09)BACKGROUND: Very little has been researched about the efficacy, effectiveness, feasibility, sustainability and impact of food-based approaches on the diets and nutritional status of populations at risk of hunger and food ...
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Tesfamariam, Eyob Habte; Ogbazghi, Zekarias Mihreteab; Annandale, John George; Gebrehiwot, Yemane (MDPI, 2020-11-28)Municipal sludge has economic value as a low-grade fertilizer as it consists of appreciable amounts of the macro and micronutrients. When using sludge as fertilizer, the economic aspect should be taken into account. In ...
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Taylor, N.J. (Nicolette); Mahohoma, Walter; Vahrmeijer, J.T.; Gush, M.B.; Allen, Robert Garth; Annandale, John George (Springer, 2015)The estimation of crop water use is critical for accurate irrigation scheduling and water licenses. However, the direct measurement of crop water use is too expensive and time consuming to be performed under all possible ...
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Ausiku, Ausiku P.; Annandale, John George; Steyn, Martin J.; Sanewe, Andrew J. (MDPI, 2022-03-18)Pearl millet is an important crop for food security in Asia and Africa’s arid and semi-arid regions. It is widely grown as a staple cereal grain for human consumption and livestock fodder. Mechanistic crop growth and ...
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Du Plessis, H.M.; Annandale, J.G. (John George), 1959-; Benad, Nico (MDPI, 2023-11-23)Irrigators are increasingly challenged to maintain or even increase production using less water, sometimes of poorer quality, and often from unconventional sources. This paper describes the main features of a newly ...
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Nyathi, Melvin K.; Du Plooy, Christiaan Phillipus; Van Halsema, Gerardo E.; Stomph, Tjeerd Jan; Annandale, John George; Struik, Paul C. (Elsevier, 2019-05)Orange-fleshed sweet potato (OFSP) leaves can be utilised as a fresh green leafy vegetable, in addition to the traditional use of storage root; therefore, OFSP can be seen as a “dual-purpose’’ crop. We hypothesized that ...
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Le Roux, Betsie; Van der Laan, Michael; Vahrmeijer, J.T.; Annandale, John George; Bristow, K.L. (Keith) (MDPI Publishing, 2016)Water footprint (WF) accounting as proposed by the Water Footprint Network (WFN) can potentially provide important information for water resource management, especially in water scarce countries relying on irrigation to ...
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Jones, Matthew R.; Singels, Abraham; Chinorumba, S.; Poser, C.; Christina, M.; Shine, J.; Annandale, John George; Hammer, G.L. (Elsevier, 2021-01)Crop modelling has the potential to assist plant breeding by identifying favourable genotypic (G) traits for specific environments (Es). Sugarcane crop models have not been rigorously evaluated against a factorial GxE ...
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Geremew, Eticha Birdo; Steyn, Joachim Marthinus; Annandale, John George (The Royal Society of New Zealand, 2007-08)Climate, cultivar, and crop management determine the growth and dry matter (dm) production of a potato (Solanum tuberosum) crop. drought and high temperature affect leaf area development and its persistence, and these in ...
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Jones, Matthew R.; Singels, Abraham; Chinorumba, S.; Patton, Alana; Poser, Christophe; Singh, Munnu; Martine, Jean Francois; Christina, M.; Shine, James M.; Annandale, John George; Hammer, G.L. (Elsevier, 2019-12)Crop improvement aims to produce high yielding genotypes for target environments. Crop models simulate yield formation as the outcome of a series of low-level processes, driven by environmental (E) variables and regulated ...
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Tesfamariam, Eyob Habte; Annandale, John George; Steyn, Joachim Marthinus (American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, 2009)The nutrient content of sludge produced by municipal water treatment works often far exceeds the requirements of nearby crops. Transporting sludge further afield is not always economically viable. This study reports on ...
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Alemayehu, Y.A.; Steyn, Joachim Marthinus; Annandale, John George (South African Society of Crop Production/ Soil Science Society of South Africa/ South African Weed Science Society/ South African Society for Horticultural Sciences, 2009-07)Hot pepper (Capsicum annuum L.) is an irrigated, high value cash crop. Irrigation requirements can be estimated following a FAO crop factor approach, using information on basal crop coefficients (Kcb), crop coefficients ...
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Abraha, Amanuel Bokhre; Truter, Wayne Frederick; Annandale, John George; Fessehazion, Melake Kessete (Taylor and Francis, 2015-04)Water and nitrogen shortages in annual ryegrass (Lolium multiflorum) production can be improved by using proper irrigation and nitrogen scheduling methods. The aim of this research was to analyse the effect of water and ...
Now showing items 1-20 of 47