References
- Anderson GC, Pathan S, Hall DJM, Sharma R, Easton J. 2021. Short- and long-term effects of lime and gypsum applications on acid soils in a water limited environment. 3. Soil chemistry. Agronomy 11: 826. https://doi.org/10.3390/agronomy11050826.
- ARC-SCW. 2021. Meteorological data base. Pretoria: Agriculture Research Council-Soil, Climate and Water (ARC-SCW).
- ARC-SG. 2021. Guidelines for the production of small grains in the summer rainfall area. Bethlehem: Agriculture Research Council-Small Grain (ARC-SG).
- Beukes DJ. 1997. Perspective on the soil acidity problem in South Africa. Proceedings of Soil Acidity Initiative Symposium. Ermelo, Mpumalanga, South Africa.
- Bosch OJH, Otto WM. 1995. The extent of soil acidity in the dryland wheat production regions of South Africa. Cereal Research Communications 23: 1–2.
- Fageria N, Baliger V. 2008. Ameliorating soil acidity of tropical Oxisols by liming for sustaining crop production. Advances in Agronomy 99: 345–399.
- Fageria NK, Nascente AS. 2014. Management of soi acidity of South American soils for sustainable crop production. Advances in Agronomy 128: 221–275.
- Farina MPW. 1997. Subsoil acidity and its management in South Africa. Proceedings of the Soil Acidity Initiative Symposium held in Ermelo, Mpumalanga, South Africa.
- Farina MPW, Channon P, Thibaut GR. 2000a. A comparison of strategies for ameliorating subsoil acidity, I. Long-term growth effects. Soil Science Society of America Journal 64(2): 646–651. https://doi.org/10.2136/sssaj2000.642646x
- Farina MPW, Channon P, Thibaut GR. 2000b. A comprehension of strategies for ameliorating subsoil acidity, II. Long-term soil effects. Soil Science Society of America Journal 64(2): 652–658.
- Fey MV. 2001a. Consequences of a landscape turned over: the effect of excessive soil acidity on the natural resources’ agriculture and forestry. In: Farina M, De Villiers M, Barnard R, Walters M (eds), Proceedings of the 5th International Plant – Soil Interactions at low level pH Conference. Alpine Health, KwaZulu-Natal, South Africa.
- Fey MV. 2001b. Acid soil degradation in South Africa: a threat to agricultural productivity. Fertilizer Society of South African Journal: 37–41.
- FERTASA. 2020. Fertilizer handbook. Pretoria: Fertilizer Association of Southern Africa.
- Goulding KWT. 2016. Soil acidification and the importance of liming agricultural soils with particular reference to the United Kingdom. Soil Use and Management 32: 390–399.
- Haumann PE. 1997. Soil acidity management in South Africa. Proceedings of Soil Acidity Initiative Symposium held in Ermelo, Mpumalanga, South Africa.
- Haumann PE, Volschenk JE. 1979. Lime requirements of soils in the Highveld Region, 1. A comparison of different methods to determine lime requirement (In Afrikaans). Agrochemophysica 11: 33–36.
- Havlin JL, Tisdale SL, Nelson WL, Benton JD. 2014. Soil fertility and fertilizers: an introduction to nutrient management (8th edn). Upper Saddle River: Pearson Prentice Hall.
- Haynes RJ. 2001. Improving nutrient use efficiency as a tool for the management of acid soils. In: Farina M, De Villiers M, Barnard R, Walters M (eds). Proceedings of the 5th International Plant – Soil Interactions at low level pH Conference. Alpine Health, KwaZulu-Natal, South Africa.
- Hodson ME, Donner E. 2013. Managing adverse soil chemical environments. In: Gregory PJ, Northcliff S (eds), Soil conditions and plant growth. Chichester: Wiley-Blackwell.
- Levene H. 1960. Robust tests for equality of variances. In: Olkin I, Ghurye SG, Hoeffding W, Madow WG, Mann HB (eds), Contribution to probability and statistics. Palo Alto: Stanford University Press.
- Non-affiliated Soil Analysis Work Committee. 1990. Handbook of standard soil testing methods for advisory purposes. Pretoria: Soil Science Society of South Africa.
- Peech M. 1965. Lime requirement. In: Black CA (ed), Methods of soil analysis, Part 2. Chemical and microbiological properties. Madison: American Society of Agronomy.
- Payne RW, Murray DA, Harding SA, Baird DB, Souter DM. 2017. GenStat for Windows (19th edn). Hemel Hempstead: VSN International.
- Ruehlmann J, Bönecke E, Meyer S. 2021. Predicting the lime demand of arable soils from pH value, soil texture, and soil organic matter content. Agronomy 11:785. https://doi.org/10.3390/agronomy11040785.
- Shapiro SS, Wilk MB. 1965.An analysis of variance test for normality (complete samples). Biometrika 52: 591–611.
- Shoemaker HE, Mclean EO, Pratt PF. 1961. Buffer methods for determining lime requirement of soils with appreciable amounts of extractable aluminium. Soil Science Society of America 25: 274–277.
- Sims JT. 2020. Lime requirement. In: Sparks DL, Page AL, Helmke PA, Loeppert RH (eds), Methods of soil analysis, part 3: Chemical methods. New York: John Wiley & Sons.
- Smyth TJ. 2012. Soil acidity and liming. In: Hung PM, Li Y and Summer ME (eds), Handbook of soil sciences: resource management and environment impacts (2nd edn). Boca Raton: CRC Press.
- Soil Classification Working Group. 1991. Soil Classification – A taxonomic system for South Africa. Pretoria: Soil and Irrigation Research Institute.
- Summer ME. 1993. Gypsum and acid soils: The world scene. Advances in Agronomy 51: 1–32.
- van der Merwe AJ, De Villiers MC, Barnard RO, Beukes DJ, Laker MC, Berry WAJ. 2001. Management and rehabilitation of acid and impoverished soils in South Africa. In: Farina M, De Villiers M, Barnard R, Walters M (eds) Proceedings of the 5th International Plant – Soil Interactions at low level pH Conference. Alpine Health, KwaZulu Natal, South Africa.
- Van der Waals JH, Claassens AS. 2002. Accurate lime recommendations under South African conditions. Communications in Soil Science and Plant Analysis 33: 3059–3074.
- Van Huyssteen CW. 2020. Relating the South African soil taxonomy to the World Reference Base for soil resources. Bloemfontein: Sun Media.
- Venter A, Herselman JE, van der Merwe GME, Steyn C, Beukes DJ. 2001. Developing soil acidity maps for South Africa. In: Farina M, De Villiers M, Barnard R, Walters M (eds), Proceedings of the 5th International Plant – Soil Interactions at low level pH Conference. Alpine Health, KwaZulu - Natal, South Africa.
- Warman PR, Walsh IY, Rodd AV. 2000. Field testing a lime requirement test for Atlantic Canada, and effect of soil pH on nutrient uptake. Communications in Soil Science and Plant Analysis 31: 2136–2169.
- Weil RR, Brady NC. 2017. The nature and properties of soils (15th edn). Upper Saddle River: Pearson Prentice Hall.
- Willmott CJ. 1981. On the validation of models. Physical Geography 2: 184–194.