| Review of existing knowledge on soil crusting in South Africa MC Laker, GP Nortjé Advances in Agronomy 155 (1), 189-242, 2019 | 39 | 2019 |
| Review of existing knowledge on subsurface soil compaction in South Africa MC Laker, GP Nortjé Advances in Agronomy 162 (1), 143-197, 2020 | 20 | 2020 |
| Factors affecting the impact of off-road driving on soils in an area in the Kruger National Park, South Africa GP Nortjé, W Van Hoven, MC Laker Environmental Management 50, 1164-1176, 2012 | 19 | 2012 |
| Studies on the impacts of off-road driving and the influence of tourists' consciousness and attitudes on soil compaction and associated vegetation in the Makuleke Contractual … GP Nortje University of Pretoria, 2014 | 14 | 2014 |
| Soil fertility trends and management in conservation agriculture: a South African perspective GP Nortje, MC Laker South African Journal of Plant and Soil 38 (3), 247-257, 2021 | 13 | 2021 |
| Factors That Determine the Sorption of Mineral Elements in Soils and Their Impact on Soil and Water Pollution GP Nortje, MC Laker Minerals 11 (8), 821, 2021 | 10 | 2021 |
| Identifying and rectifying complacency in the South African avocado cold chain MC Dodd, RM Nelson, G Nortje, E Louw Proceedings VI World Avocado Congress, 2007 | 9 | 2007 |
| Quantifying the impact of off-road driving on root-area distribution in soils GP Nortjé, W Hoven, MC Laker, JC Jordaan African Journal of Wildlife Research 46 (1), 33-48, 2016 | 8 | 2016 |
| Human impacts on sustainable land management in game parks: findings based on research in Kruger National Park, South Africa, and reconnaissance studies in the Serengeti … GP Nortje Nature & Faune 30 (1), 72-74, 2015 | 5 | 2015 |
| An Evaluation of the Ecological Impacts of Sand Mining on the Mokolo River in Lephalale, South Africa MP Maeko | 4 | 2020 |
| A game drive optimisation strategy for Etosha Heights Game Safaris-Etosha heights, Namibia G Nortjé Tshwane, 2019 | 4 | 2019 |
| The successes of stinkbug research and the Stinkbug Working Group in the Southern African Avocado and Macadamia industries GP Nortjé, A Botha, SP Schoeman, BM Botha Proceedings of the South African Avocado Growers’ Association Annual …, 2017 | 4 | 2017 |
| Findings and provisional recommendations regarding environmental impacts of land management in pastoralist and wildlife eco-tourism co-existence: a Maasai and wildlife eco … GP Nortjé, CJ Nortjé Nature & Faune 31 (2), 47-51, 2017 | 4 | 2017 |
| Soil science research needs in Southern African protected areas GP Nortjé, CJ Nortjé Eighth Annual Oppenheimer De Beers Group Research Conference. 17and18 October, 2017 | 3 | 2017 |
| General Soil Threats of the Region–Africa South of the Sahara: Soil Threat 1–Erosion by water and wind GP NORTJÉ Subtrop Journal 14, 8-9, 2016 | 3 | 2016 |
| Tourists’ perceptions of off-road driving in the Makuleke Contractual Region of Kruger National Park GP Nortje, K Mearns African Journal of Hospitality, Tourism and Leisure 6 (4), 15, 2017 | 2 | 2017 |
| Subtropical orchard soil surface crusting and PAM GP Nortjé, SF Schoeman Yearbook of the S. Afr. Macadamia Growers’ Assoc 23, 2016 | 2 | 2016 |
| Census report G Nortje a Nutshell July/August 2012, 2-4, 2012 | 2 | 2012 |
| Impact of off-road driving by game drive vehicles on soils in an area in the Kruger National Park, South Africa GP Nortjé, W van Hoven, J Laker, MC & vd Waals Proceedings of the 8th International Soil Science Congress: Land degradation …, 2012 | 2 | 2012 |
| Fertilization of Macadamia Nuts GP Nortjé College of Agriculture and Environmental Sciences, Department of …, 2017 | 1 | 2017 |
