Browsing Research Articles (Plant Production and Soil Science) by UP Author "Haverkort, A.J. (Anton)"
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Browsing Research Articles (Plant Production and Soil Science) by UP Author "Haverkort, A.J. (Anton)"
Now showing items 1-19 of 19
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Deguchi, T.; Iwama, K.; Haverkort, A.J. (Anton) (Springer, 2016-09)Japan annually produces 2.4 million tons of potato on 79,700 ha. There are four cropping seasons stretching from 24° to 45° N: a winter crop at Okinawa, spring and autumn crops at Kyushu and southern Honshu, and a single ...
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Bararyenya, Astère; Nahayo, Pierre-Claver; Nduwimana, Anicet; Niyonzima, Pierre; Nyawakira, Déo; Sindihebura, Jean-Pierre; Vyizigiro, Ernest; Ndayishimiye, Vital; Haverkort, A.J. (Anton) (Springer, 2018-03)From 2014 through 2016, on-farm experiments were carried out in three provinces surrounding Bujumbura town in Burundi to improve the low potato (Solanum tuberosum) yields, which currently stand at about 6 t ha−1. It was ...
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Svubure, Oniward; Struik, P.C.; Haverkort, A.J. (Anton); Steyn, J.M. (Joachim Marthinus), 1963- (Sage, 2018)Agriculture contributes significantly to the global greenhouse gas (GHG) emissions. Farmers need to fine-tune agricultural practices to balance the trade-offs between increasing productivity in order to feed a growing ...
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Haverkort, A.J. (Anton); Franke, A.C.; Engelbrecht, F.A. (Francois Alwyn); Steyn, J.M. (Joachim Marthinus), 1963- (European Association for Potato Research, 2013-04)Explorations of the impact of climate change on potential potato yields were obtained by downscaling the projections of six different coupled climate models to high spatial resolution over southern Africa. The simulations ...
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Franke, A.C.; Haverkort, A.J. (Anton); Steyn, J.M. (Joachim Marthinus), 1963- (European Association for Potato Research, 2013-03)This study aims to assess the risks and opportunities posed by climate change to potato growers in South Africa and to evaluate adaptation measures in the form of changes in planting time growers could adopt to optimise ...
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Van der Waals, Jacqueline Elise; Krüger, K.; Franke, A.C.; Haverkort, A.J. (Anton); Steyn, J.M. (Joachim Marthinus), 1963- (European Association for Potato Research, 2013-03)A set of daily weather data simulations for 1961 to 2050 were used to calculate past and future trends in pest and disease pressure in potato cropping systems at three agro-ecologically distinct sites in South Africa: ...
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Svubure, Oniward; Struik, P.C.; Haverkort, A.J. (Anton); Steyn, J.M. (Joachim Marthinus), 1963- (Springer, 2017-03)Irish potato production in Zimbabwe can be traced back to the early 1900s. Large-scale commercial farmers dominated production till the early 2000s. Potato is the most important horticultural crop and has been declared ...
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Haverkort, A.J. (Anton); Hillier, J.G. (Springer, 2011)The Cool Farm Tool – Potato (CFT-Potato) is a spreadsheet program that allows the calculation of the amount of CO2 equivalents that it costs to produce one ton of potato. The spreadsheet was adapted from an original ...
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Franke, A.C.; Steyn, J.M. (Joachim Marthinus), 1963-; Ranger, K.S.; Haverkort, A.J. (Anton) (Elsevier, 2011-04)The sustainability of agricultural production is linked to the environment from which it draws its resources. Potato production in the Sandveld in the South African Western Cape occurs in the Cape Floral Kingdom: a ...
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Machakaire, Allan T.B.; Steyn, J.M. (Joachim Marthinus), 1963-; Caldiz, D.O.; Haverkort, A.J. (Anton) (Springer, 2016-09)The LINTUL-Potato-DSS model uses the linear relationship between radiation intercepted by the crop and radiation-use efficiency (RUE), to calculate dry matter production. The model was developed into a yield forecasting ...
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Van der Waals, Jacqueline Elise; Steyn, J.M. (Joachim Marthinus), 1963-; Franke, A.C.; Haverkort, A.J. (Anton) (Elsevier, 2016-06)Growers’ surveys took place in all sixteen potato growing regions of South Africa in 2013 and 2014. The agro-ecological climate of these regions is diverse and potato is produced in rainy or dry seasons, in winter or ...
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Molahlehi, L; Steyn, J.M. (Joachim Marthinus), 1963-; Haverkort, A.J. (Anton) (European Association for Potato Research, 2013-09)Potato response to environment, planting date and genotype was studied for different agro-ecological zones in Lesotho. Field experiments were conducted at four different sites with altitudes ranging from 1,655 to 2,250 ...
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Svubure, Oniward; Struik, P.C.; Haverkort, A.J. (Anton); Steyn, J.M. (Joachim Marthinus), 1963- (IP Publishing, 2016)Frameworks to evaluate the sustainability of cropping systems in developing countries are scarce. This study proposes a framework to select easily quantifiable indicators that can be used to assess and communicate the ...
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Steyn, J.M. (Joachim Marthinus), 1963-; Franke, A.C.; Van der Waals, Jacqueline Elise; Haverkort, A.J. (Anton) (Elsevier, 2016-12)Potato, the most important vegetable crop in South Africa, is produced in many distinct geographical regions differing in climate, soils, production seasons and management practices and access to markets. These differences ...
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Haverkort, A.J. (Anton); Franke, A.C.; Steyn, J.M. (Joachim Marthinus), 1963-; Pronk, A.A.; Caldiz, D.O.; Kooman, P.L. (Springer, 2015-10-31)In 1994, LINTUL-POTATO was published, a comprehensive model of potato development and growth. The mechanistic model simulated early crop processes (emergence and leaf expansion) and light interception until extinction, ...
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Haverkort, A.J. (Anton); De Ruijter, F.J.; Van Evert, F.K.; Conijn, J.G.; Rutgers, B. (Springer, 2013-12)Potato and its derivatives increasingly become globally traded products. Commercial companies more and more want to quantify the environmental footprints such as the efficiency of the use of land and water, greenhouse ...
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Van Evert, F.K.; De Ruijter, F.J.; Conijn, J.G.; Rutgers, B.; Haverkort, A.J. (Anton) (Springer, 2013-12)Agriculture has a large impact on the environment and retailers increasingly stimulate their suppliers to reduce the environmental impact of agricultural production. The environmental impact resulting from producing ...
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Svubure, Oniward; Struik, P.C.; Haverkort, A.J. (Anton); Steyn, J.M. (Joachim Marthinus), 1963- (Elsevier (open access), 2015-07)tIrish potato is the third most important carbohydrate food crop in Zimbabwe after maize and wheat. In2012, the Government of Zimbabwe declared it a strategic national food security crop. In this study, weexamine the ...
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Haverkort, A.J. (Anton); Sandaña, Patricio; Kalazich, J. (European Association for Potato Research, 2014-03)In Chile, potatoes are grown in a wide range of ecological zones and levels of technology resulting in wide ranges of crop management and yields. The aim of the present study was to assess yield gaps, resource use ...
Now showing items 1-19 of 19