Jonas, N. C., Justina, N. C. & Mairura, F. Mineral fertilizers in the farming systems of sub-Saharan Africa. A review. Agron. Sustain. Dev. 32, 545–566 (2012).
Bationo, A. Managing nutrient cycles to sustain soil fertility in sub Saharan Africa. afnet-ciat 53 (2004).
Burton, A. Influence of Solution Management Techniques on Nutrient Use Efficiency in Hydroponically Grown Salad-type Plants. proquest (2018).
Gitari, H. I. et al. Optimizing yield and economic returns of rain-fed potato (Solanum tuberosum L.) through water conservation under potato-legume intercropping systems. Agric. Water Manag 208, 59–66 (2018).
Obare, G., Nyagaka, D., Nguyo, W. & Mwakubo, S. M. Are Kenyan smallholders allocatively efficient? Evidence from Irish potato producers in Nyandarua North district. J. Dev. Agric. Econ. 2, 78–85 (2010).
Honeycutt, C. W., Clapham, W. M. & Leach, S. S. Crop rotation and N fertilization effects on growth, yield, and disease incidence in potato. Am. Potato J 73, 45–61 (1996).
Trehan, S. P., Pandey, S. K. & Bansal, S. Potassium Nutrition of the Potato Crop – the Indian Scenario. e-ifc (2009).
Burke, J. J. Growing the Potato crop. Vita (Vita, 2016).
Muthoni, J. & Nyamongo, D. O. A review of constraints to ware Irish potatoes production in Kenya. Forestry 1, 98–102 (2009).
Muthoni, J. Soil fertility situation in potato producing Kenyan highlands -case of KALRO-Tigoni. Int. J. Hortic. 6 (2016).
Kaguongo, W. et al. Farmer practices and adoption of improved potato varieties in kenya and uganda. Social Sciences 5 (2008).
Ogola, J. B. O., Ayieko, M. W., Orawo, A. O. & Kimani, F. W. Analysis of fertiliser use in potato production in Nakuru district, Kenya. J. Agric. Res 6, 3672–3677 (2011).
Nyawade, S. O. Effect of potato (Solanum tuberosum L.) cropping system on soil and nutrient losses through run-off in humic nitisol. (2015).
Fageria, N. K. & Zimmermann, F. J. P. Influence of pH on growth and nutrient uptake by crop species in an Oxisol. Commun. Soil Sci. Plant Anal. 29, 2675–2682 (1998).
IPNI. Soil pH and the availability of plant nutrients. fall 2, 3535 (2010).
Westermann, D. Nutritional requirements of potatoes. Am. J. Potato Res 82, 301–307 (2005).
Wekesa, M. N., Okoth, M. W., Abong, G. O., Muthoni, J. & Kabira, J. N. Effect of Soil Characteristics on Potato Tuber Minerals Composition of Selected Kenyan Varieties. J. Agric. Sci 6, 163–171 (2014).
Kihara, J. et al. Application of secondary nutrients and micronutrients increases crop yields in sub-Saharan Africa. Agron. Sustain. Dev. 37, 25 (2017).
Rosen, C. J. Nutrient Management for Potato Production. University of minnesota extension (2015).
Hiddink, J. G. & Kaiser, M. J. Implications of Liebig’s law of the minimum for the use of ecological indicators based on abundance. Ecography (Cop.). 28, 264–271 (2005).
Roy, R. N., Finck, A., Blair, G. J. & Tandon, H. L. S. Plant nutrition for food security; a guide for integrated nutrient management. (2006).
Roy, R. N., Misra, R. V., Lesschen, J. P. & Smaling, E. M. Assessment of Soil Nutrient Balance: Approaches and Methodologies. FAO Fertilizer and Plant Nutrition Bulletin 14 (2003).
Munson, R. D. & Nelson, W. L. Principles and practices in plant analysis. Princ. Pract. plant Anal. 359–388 (1990).
Mangale, N. et al. Manual for Integrated Soil Fertility Management in Kenya. (2016).
Schulte, E. E., Kelling, K. A., Schulte, E.E. & Kelling, K. A. Plant analysis: a diagnostic tool. Crop Fertil. (2005).
Motsara, M. & Roy, R. Guide to laboratory establishment for plant nutrient analysis. (2008).
Reuter, D. J., Robinson, J. B. & Dutkiewicz, C. Plant analysis: an interpretation manual. csiro (CSIRO Pub, 1997).
Reis, R. D. A. Jr. & Monnerat, P. H. Nutrient concentrations in potato stem, petiole and leaflet in response to potassium fertilizer. Sci. Agric. 57, 251–255 (2000).
Kaiser, D. E., Lamb, J. A. & Rosen, C. Plant Analysis Sampling and Interpretation. university of minnesota extension (2013).
Landon, J. R. Booker Tropical Soil Manual: A handbook for soil survey and agricultural land evaluation in the tropics and subtropics. (1991).
Shukla, M. K., Lal, R. & Ebinger, M. Determining soil quality indicators by factor analysis. Soil Tillage Res 87, 194–204 (2006).
Harou, A. P. et al. Can information improve investment? Effects of site-specific soil recommendations on fertilizer demand. (2018).
Fairhurst, T. Handbook for Integrated soil Fertility Management. 151 (2012).
Jaetzold, R., Schmidt, H., Hornetz, B. & Shisanya, C. Farm management handbook of Kenya – Subpart C1. II (2006).
Mylavarapu, R. S., Sanchez, J. F., Nguyen, J. H. & Bartos, J. M. Evaluation of Mehlich-1 and Mehlich-3 extraction procedures for plant nutrients in acid mineral soils of Florida. Commun. Soil Sci. Plant Anal. 33, 807–820 (2002).
Hou, X. & Jones, B. T. Inductively Coupled Plasma–Optical Emission Spectrometry. Spectroscopy Letters 42, 58–61 (2000).
Houba, V. J. G., Temminghoff, E. J. M., Gaikhorst, G. A. & Van Vark, W. Soil Analysis Procedures Using 0.01 M Calcium Chloride as Extraction Reagent. Commun Soil Sci Plantanal 31, 1299–1396 (2000).
Westerman, R. L., Jones, J. B. & Case, V. W. Sampling, Handling, and Analyzing Plant Tissue Samples. in Soil Testing and Plant Analysis sssabookseries, 389–427 (Soil Science Society of America, 1990).
Gachene, C. K. K. & Kimaru, G. G. Soil fertility and land productivity: a guide for extension workers in the eastern africa region. Relma handbook series (Regional Land Management Unit, 2003).
FAO. Lecture Notes on the Major Soils of the World: Cambisols (CM). FAO Corporate Document Repository (2014), http://www.fao.org/docrep/003/Y1899E/y1899e12.htm. (Accessed: 19th December 2017).
Ruttenberg, K. C. Phosphorus Cycle. Encycl. Ocean Sci. 401–412, (2001). https://doi.org/10.1016/B978-012374473-9.00277-0.
Cui, X., Zhang, Y., Gao, J., Peng, F. & Gao, P. Long-term combined application of manure and chemical fertilizer sustained higher nutrient status and rhizospheric bacterial diversity in reddish paddy soil of Central South China. Sci. Rep 8, 16554 (2018).
Goulding, K. W. T. Soil acidification and the importance of liming agricultural soils with particular reference to the United Kingdom. Soil use Manag 32, 390–399 (2016).
Bingham, A. H. & Cotrufo, M. F. Organic nitrogen storage in mineral soil: Implications for policy and management. Sci. Total Environ. 551–552, 116–126 (2016).
Lamb, J. A., Fernandez, F. G. & Kaiser, D. E. Understanding nitrogen in soils. Univ. Florida, IFAS Ext. 1–5 (2014).
Moulin, A. P., Cohen, Y., Alchanatis, V., Tremblay, N. & Volkmar, K. Yield response of potatoes to variable nitrogen management by landform element and in relation to petiole nitrogen – A case study. Can. J. Plant Sci. 92, 771–781 (2012).
Mohler, C. L. & Johnson, S. E. Crop Rotation on Organic Farms: A Planning Manual . Engineering (2009).
Mnthambala, F., James, H. A. M., Max, W. L. & Venon, H. K. Soil management effects on phosphorus sorption and external P requirement in oxisols of Malawi. J. Soil Sci. Environ. Manag. 7, 106–114 (2016).
Shen, J. et al. Phosphorus Dynamics: From Soil to Plant. Plant Physiol. 156, 997–1005 (2011).
Haygarth, P. M., Hepworth, L. & Jarvis, S. C. Forms of phosphorus transfer in hydrological pathways from soil under grazed grassland. Eur. J. Soil Sci. (United Kingdom) (1998).
Fisher, M. Sub-soil phosphorus loss: A complex problem with no easy solutions. CSA News 60, 4 (2015).
Nyawade, S. et al. Controlling soil erosion in smallholder potato farming systems using legume intercrops. Geoderma Reg. e00225, (2019). https://doi.org/10.1016/j.geodrs.2019.e00225.
Laekemariam, F., Kibret, K. & Shiferaw, H. Potassium (K)-to-magnesium (Mg) ratio, its spatial variability and implications to potential Mg-induced K deficiency in Nitisols of Southern Ethiopia. Agric. Food Secur 7, 13 (2018).
Koch, M., Naumann, M., Pawelzik, E., Gransee, A. & Thiel, H. The Importance of Nutrient Management for Potato Production Part I: Plant Nutrition and Yield. Potato Res. 1–23, (2019). https://doi.org/10.1007/s11540-019-09431-2.
IPNI. Potassium availability and uptake. Better Crop 82, 14–15 (1998).
Havlin, J. L. Fertility. in Reference Module in Earth Systems and Environmental Sciences, https://doi.org/10.1016/B978-0-12-409548-9.05162-9 (Elsevier, 2013).
Sharma, D. K., Kushwah, S. S., Nema, P. K. & Rathore, S. S. Effect of Sulphur on Yield and Quality of Potato (Solanum tuberosum L.). Int. J. Agric. Res. 6, 143–148 (2011).
Kenya Soil Survey. Soil suitability evaluation for maize production in Kenya. (2014).
Singh, H., Sharma, M., Goyal, A. & Bansal, M. Effect of Nitrogen and Sulphur on Growth and Yield Attributes of Potato (Solanum tuberosum L.). Int. J. Plant Soil Sci. 9, 1–8 (2016).
Muthoni, J., Shimelis, H. & Melis, R. Potato Production in Kenya: Farming Systems and Production Constraints. J. Agric. Sci. 5, 182–197 (2013).
Jones, C., Olson-rutz, K. & McCauley, A. Soil pH and Organic Matter. Montana state university -extension 1–16 (2017).
Ahmad, W., Zia, M. H., Malhi, S. S. & Niaz, A. Boron Deficiency in Soils and Crops: A Review. Crop Plant 78–117 (2012).
Morgan, J. B. & Connolly, E. L. Plant-Soil Interactions: Nutrient Uptake. Nat. Educ. Knowl 4, 2 (2013).
Gitari, H. I. et al. Nitrogen and phosphorous uptake by potato (Solanum tuberosum L.) and their use efficiency under potato-legume intercropping systems. F. Crop. Res 222, 78–84 (2018).
Kolbe, H. & Stephan-Beckmann, S. Development, growth and chemical composition of the potato crop (Solanum tuberosum L.). I. leaf and stem. Potato Res. 40, 111–129 (1997).
Korkmaz, K., Dede, Ö., Erdem, H., Çankaya, S. & Akgün, M. Relationships between chemical and physical properties of soils and nutrient status of plants on yield of potato. Fresenius Environ. Bull. 24, 4108–4113 (2015).
Tariq, M. & Mott, C. J. B. The Significance of Boron in Plant Nutrition and Environment-A Review. J. Agron. 6, 1–10 (2007).
Azeez, M., Adesanwo, O. O. & Adepetu, J. A. Effect of Copper (Cu) application on soil available nutrients and uptake. African. J. Agric. Res. 10, 359–364 (2015).
Arora, C. L. & Sekhon, G. S. The effect of soil characteristics on the zinc-copper interaction in the nutrition of wheat. J. Agric. Sci. 99, 185–189 (1982).
Nunes, I. et al. Coping with copper: legacy effect of copper on potential activity of soil bacteria following a century of exposure. FEMS Microbiol. Ecol. 92, fiw175 (2016).
Fernandes, A. M., Soratto, R. P., Souza, E., de F. C. & Job, A. L. G. Nutrient uptake and removal by potato cultivars as affected by phosphate fertilization of soils with different levels of phosphorus availability. Rev. Bras. Ciência do Solo 41 (2017).
Nunes, J. C. S., Fontes, P. C. R., Araújo, E. F. & Sediyama, C. Potato plant growth and macronutrient uptake as affected by soil tillage and irrigation systems. Pesqui. Agropecu. Bras. 41, 1787–1792 (2006).
Mari, A. H. et al. Assessing Zinc Status of Sugarcane in Taluka Nawabshah Through Soil and Plant Analysis. J. Appl. Sci. 6, 206–210 (2009).
Hailu, H. et al. Soil fertility status and wheat nutrient content in Vertisol cropping systems of central highlands of Ethiopia. Agric. Food Secur. 4, 19 (2015).
Farias, G. et al. Effects of excess copper in vineyard soils on the mineral nutrition of potato genotypes. Food Energy Secur. 49–69, https://doi.org/10.1002/fes3.16 (2013).
Source: Ecology - nature.com
