- Achard, F. and Banoin, M. (2003), ‘Fallows, forage production and nutrient transfers by livestock in niger’, Nutrient Cycling in Agroecosystems 65(2), 183–189.
Paper not yet in RePEc: Add citation now
- Achieng, J., Ouma, G., Odhiambo, G., Muyekho, F. et al. (2010), ‘Effect of farmyard manure and inorganic fertilizers on maize production on alfisols and ultisols in kakamega, western kenya.’, Agriculture and Biology Journal of North America 1(4), 430–439.
Paper not yet in RePEc: Add citation now
- Bivand, R. S., Pebesma, E. and Gomez-Rubio, V. (2013), Applied spatial data analysis with R, Second edition, Springer, NY.
Paper not yet in RePEc: Add citation now
- Chamberlin, J., Masuki, K., Karwani, G., Nord, A., Simbogoso, V., Craufurd, P., Snapp, S., Jayne, T. S., Mushongi, A. and Magoye, L. (2018), ‘Tanzania agronomy panel survey (aps) 2017 - taking maize agronomy to scale in africa (tamasa) project’.
Paper not yet in RePEc: Add citation now
Cooksey, B. (2011), ‘Marketing reform? the rise and fall of agricultural liberalisation in tanzania’, Development Policy Review 29, s57–s81.
Cornia, G. A. (1985), ‘Farm size, land yields and the agricultural production function: An analysis for fifteen developing countries’, World development 13(4), 513–534.
- Croon, I., Deutsch, J. and Temu, A. (1984), ‘Maize production in tanzania’s southern highlands: current status and recommendations for the future’.
Paper not yet in RePEc: Add citation now
- De’ath, G. and Fabricius, K. E. (2000), ‘Classification and regression trees: a powerful yet simple technique for ecological data analysis’, Ecology 81(11), 3178–3192.
Paper not yet in RePEc: Add citation now
Ekbom, A., Sterner, T. et al. (2008), Production function analysis of soil properties and soil con-servation investments in tropical agriculture, Technical report.
Ellis, F. (1982), ‘Agricultural price policy in tanzania’, World Development 10(4), 263–283.
- Fermont, A. M., Van Asten, P. J., Tittonell, P., Van Wijk, M. T. and Giller, K. E. (2009), ‘Closing the cassava yield gap: an analysis from smallholder farms in east africa’, Field Crops Research 112(1), 24–36.
Paper not yet in RePEc: Add citation now
- Fick, S. E. and Hijmans, R. J. (2017), ‘Worldclim 2: new 1-km spatial resolution climate surfaces for global land areas’, International Journal of Climatology 37(12), 4302–4315.
Paper not yet in RePEc: Add citation now
- Food and Agricultural Organisation of the United Nations (2012), ‘Soils map of tanzania’.
Paper not yet in RePEc: Add citation now
- Gibbon, P., Havnevik, K. J. and Hermele, K. (1993), A blighted harvest: the World Bank & African agriculture in the 1980s, Africa World Press.
Paper not yet in RePEc: Add citation now
Giller, K. E., Rowe, E. C., de Ridder, N. and van Keulen, H. (2006), ‘Resource use dynamics and interactions in the tropics: Scaling up in space and time’, Agricultural Systems 88(1), 8– 27.
- Global Administrative Areas (2012). [Online; accessed August 26, 2018].
Paper not yet in RePEc: Add citation now
- Heathfield, D. F. and Wibe, S. (1987), An introduction to cost and production functions, Humanities Pr.
Paper not yet in RePEc: Add citation now
- Hijmans, R. J. (2018), raster: Geographic Data Analysis and Modeling. R package version 2.7-8/r3387.
Paper not yet in RePEc: Add citation now
Isham, J. (2002), ‘The effect of social capital on fertiliser adoption: Evidence from rural tanzania’, Journal of African Economies 11(1), 39–60.
Isinika, A. C., Msuya, E. E., Djurfeldt, G. and Aryeetey, E. (2011), ‘Addressing food selfsufficiency in tanzania: a balancing act of policy coordination’, African Smallholders: Food Crops, Markets and Policy, G. Djurfeldt et al .
- Ismail, I., Blevins, R. and Frye, W. (1994), ‘Long-term no-tillage effects on soil properties and continuous corn yields’, Soil Science Society of America Journal 58(1), 193–198.
Paper not yet in RePEc: Add citation now
Kaliba, A. R., Verkuijl, H. and Mwangi, W. (2000), ‘Factors affecting adoption of improved maize seeds and use of inorganic fertilizer for maize production in the intermediate and lowland zones of tanzania’, Journal of Agricultural and Applied Economics 32(1), 35–47.
- Kangalawe, R. Y., Christiansson, C. and Östberg, W. (2008), ‘Changing land-use patterns and farming strategies in the degraded environment of the irangi hills, central tanzania’, Agriculture, ecosystems & environment 125(1-4), 33–47.
Paper not yet in RePEc: Add citation now
- Kassambara, A. and Mundt, F. (2017), factoextra: Extract and Visualize the Results of Multivariate Data Analyses. R package version 1.0.5. SOAS Department of Economics Working Paper No 218 – 2019 URL: https://CRAN.R-project.org/package=factoextra Katinila, N., Verkuijl, H., Mwangi, W., Anandajayasekeram, P. and Moshi, A. J. (1998), Adoption of maize production technologies in Southern Tanzania, CIMMYT.
Paper not yet in RePEc: Add citation now
- Kelly, P. M. and Adger, W. N. (2000), ‘Theory and practice in assessing vulnerability to climate change andfacilitating adaptation’, Climatic change 47(4), 325–352.
Paper not yet in RePEc: Add citation now
- Kihara, J., Nziguheba, G., Zingore, S., Coulibaly, A., Esilaba, A., Kabambe, V., Njoroge, S., Palm, C. and Huising, J. (2016), ‘Understanding variability in crop response to fertilizer and amend-ments in sub-saharan africa’, Agriculture, ecosystems & environment 229, 1–12.
Paper not yet in RePEc: Add citation now
- Lal, R. (2006), ‘Enhancing crop yields in the developing countries through restoration of the soil organic carbon pool in agricultural lands’, Land Degradation & Development 17(2), 197–209.
Paper not yet in RePEc: Add citation now
- Lema, M. and Majule, A. E. (2009), ‘Impacts of climate change, variability and adaptation strategies on agriculture in semi arid areas of tanzania: The case of manyoni district in singida region, tanzania’, African Journal of Environmental Science and Technology 3(8), 206–218.
Paper not yet in RePEc: Add citation now
- Lopes, A. (1980), ‘Micronutrients in soils of the tropics as constraints to food production’, Priorities for alleviating soil-related constraints to food production in the tropic pp. 277– 298.
Paper not yet in RePEc: Add citation now
- Lungu, O., Temba, J., Chirwa, B. and Lungu, C. (1993), ‘Effects of lime and farmyard manure on soil acidity and maize growth on an acid alfisol from zambia’.
Paper not yet in RePEc: Add citation now
- Mahoo, H., Young, M. and Mzirai, O. (1999), ‘Rainfall variability and its implications for the transfer-ability of experimental results in the semi arid areas of tanzania’, Tanzania Journal of Agricultural Sciences 2(2).
Paper not yet in RePEc: Add citation now
- Mongi, H., Majule, A. E. and Lyimo, J. G. (2010), ‘Vulnerability and adaptation of rain fed agriculture to climate change and variability in semi-arid tanzania’, African Journal of Environmental Science and Technology 4(6). Morris, M. (n.d.), Understanding household coping strategies in semi-arid tanzania. department for international development strategy for research on renewable natural resources, in ‘Institute, University of Greenwich. UK Deptarment for International Development’, Citeseer.
Paper not yet in RePEc: Add citation now
- Morton, J. F. (2007), ‘The impact of climate change on smallholder and subsistence agriculture’, Proceedings of the national academy of sciences 104(50), 19680–19685.
Paper not yet in RePEc: Add citation now
Nkonya, E., Schroeder, T. and Norman, D. (1997), ‘Factors affecting adoption of improved maize seed and fertiliser in northern tanzania’, Journal of Agricultural Economics 48(1-3), 1–12.
Omamo, S. W., Williams, J. C., Obare, G. and Ndiwa, N. (2002), ‘Soil fertility management on small farms in africa: evidence from nakuru district, kenya’, Food policy 27(2), 159–170.
Pavelescu, F.-M. et al. (2011), ‘Some aspects of the translog production function estimation’, Ro-manian Journal of Economics 32(1), 41.
Putterman, L. (1995), ‘Economic reform and smallholder agriculture in tanzania: A discussion of recent market liberalization, road rehabilitation, and technology dissemination efforts’, World Development 23(2), 311–326 SOAS Department of Economics Working Paper No 218 – 2019 R Core Team (2013), R: A Language and Environment for Statistical Computing, R Foundation for Statistical Computing, Vienna, Austria.
R package version 0.7.6. URL: https:CRAN.R-project.org/package=dplyr Wiig, H., Aune, J. B., Glomsrød, S. and Iversen, V. (2001), ‘Structural adjustment and soil degrada-tion in tanzania a cge model approach with endogenous soil productivity’, Agricultural Economics 24(3), 263–287.
- Reeves, D. (1997), ‘The role of soil organic matter in maintaining soil quality in continuous cropping systems’, Soil and Tillage Research 43(1-2), 131–167.
Paper not yet in RePEc: Add citation now
- Rowhani, P., Lobell, D. B., Linderman, M. and Ramankutty, N. (2011), ‘Climate variability and crop production in tanzania’, Agricultural and Forest Meteorology 151(4), 449–460.
Paper not yet in RePEc: Add citation now
Seyoum, E., Battese, G. E. and Fleming, E. (1998), ‘Technical efficiency and productivity of maize producers in eastern ethiopia: a study of farmers within and outside the sasakawaglobal 2000 project’, Agricultural economics 19(3), 341–348.
- Skarstein, R. (2005), ‘Economic liberalization and smallholder productivity in tanzania. from promised success to real failure, 1985–1998’, Journal of Agrarian Change 5(3), 334–362.
Paper not yet in RePEc: Add citation now
- Smaling, E. M. and Braun, A. (1996), ‘Soil fertility research in sub-saharan africa: New dimensions, new challenges’, Communications in Soil Science and Plant Analysis 27(3-4), 365–386.
Paper not yet in RePEc: Add citation now
- SOAS Department of Economics Working Paper No 218 – 2019 Tsien, C. L., Fraser, H., Long, W. J. and Kennedy, R. L. (1998), ‘Using classification tree and logistic regression methods to diagnose myocardial infarction’, Medinfo 98.
Paper not yet in RePEc: Add citation now
- SOAS Department of Economics Working Paper No 218 – 2019 URL: http://www.fao.org/agriculture/seed/cropcalendar/welcome.do Food and Agricultural Organisation of the United Nations (2018b), ‘FAOSTAT Database’.
Paper not yet in RePEc: Add citation now
- Tabu, I., Obura, R., Bationo, A. and Nakhone, L. (2005), ‘Effect of farmers’ management practices on soil properties and maize yield’, J. Agron 4, 1–7.
Paper not yet in RePEc: Add citation now
The World Bank (2017), ‘Agricultural inputs’. data retrieved from World Development Indicators: http://data.worldbank.org/indicator/SP.DYN.LE00.FE.IN.
- Therneau, T. and Atkinson, B. (2018), rpart: Recursive Partitioning and Regression Trees. R package version 4.1-13.
Paper not yet in RePEc: Add citation now
- Tittonell, P. and Giller, K. E. (2013), ‘When yield gaps are poverty traps: The paradigm of ecological intensification in african smallholder agriculture’, Field Crops Research 143, 76– 90.
Paper not yet in RePEc: Add citation now
- Tittonell, P., Shepherd, K. D., Vanlauwe, B. and Giller, K. E. (2008), ‘Unravelling the effects of soil and crop management on maize productivity in smallholder agricultural systems of western kenya—an application of classification and regression tree analysis’, Agriculture, ecosystems & environment 123(1-3), 137–150.
Paper not yet in RePEc: Add citation now
Tittonell, P., Vanlauwe, B., De Ridder, N. and Giller, K. E. (2007), ‘Heterogeneity of crop productivity and resource use efficiency within smallholder kenyan farms: Soil fertility gradients or management intensity gradients?’, Agricultural systems 94(2), 376–390.
- Tittonell, P., Vanlauwe, B., Leffelaar, P., Rowe, E. C. and Giller, K. E. (2005), ‘Exploring diversity in soil fertility management of smallholder farms in western kenya: I. heterogeneity at region and farm scale’, Agriculture, ecosystems & environment 110(3-4), 149–165.
Paper not yet in RePEc: Add citation now
- Umar, H., Girei, A. and Yakubu, D. (2017), ‘Comparison of cobb-douglas and translog frontier mod-els in the analysis of technical efficiency in dry-season tomato production’, Agrosearch 17(2), 67– 77.
Paper not yet in RePEc: Add citation now
- URL: http://data.fao.org/ref/3e7aa06e-2736-4b91-a70b-9babd6e14ff8.html?version=1.0 Food and Agricultural Organisation of the United Nations (2018a), ‘FAO Crop Calendar’.
Paper not yet in RePEc: Add citation now
- URL: http://ggplot2.org Wickham, H., François, R., Henry, L. and Müller, K. (2018), dplyr: A Grammar of Data Manipulation.
Paper not yet in RePEc: Add citation now
- URL: http://github.com/vqv/ggbiplot Wickham, H. (2016), ggplot2: Elegant Graphics for Data Analysis, Springer-Verlag New York.
Paper not yet in RePEc: Add citation now
URL: http://hdl.handle.net/11529/10548038 Collier, P. and Gunning, J. W. (1999), ‘Explaining african economic performance’, Journal of eco-nomic literature 37(1), 64–111.
- URL: http://www.asdar-book.org/ Braun, A. R., Smaling, E. M., Muchugu, E. I., Shepherd, K., Corbett, J. D. et al. (1997), ‘Maintenance and improvement of soil productivity in the highlands of ethiopia, kenya, madagascar and uganda: an inventory of spatial and non-spatial survey and research data on natural re-sources and land productivity’, AHI technical report series/International Centre for Research in Agroforestry. African Highlands Initiative; no. 6.
Paper not yet in RePEc: Add citation now
- URL: http://www.fao.org/faostat/en/data/QC Funk, C., Peterson, P., Landsfeld, M., Pedreros, D., Verdin, J., Shukla, S., Husak, G., Rowland, J., Harrison, L., Hoell, A. et al. (2015), ‘The climate hazards infrared precipitation with stations—a new environmental record for monitoring extremes’, Scientific data 2, 150066.
Paper not yet in RePEc: Add citation now
- URL: http://www.gadm.org/home Hammer, R. D., Philpot, J. W. and Maatta, J. M. (1990), ‘Applying principal component analysis to soil-landscape research-quantifying the subjective’.
Paper not yet in RePEc: Add citation now
URL: http://www.R-project.org/ Ray, S. C. (1982), ‘A translog cost function analysis of us agriculture, 1939–77’, American Journal of Agricultural Economics 64(3), 490–498.
- URL: https://CRAN.R-project.org/package=rpart Therneau, T. M., Atkinson, E. J. et al. (1997), ‘An introduction to recursive partitioning using the rpart routines’.
Paper not yet in RePEc: Add citation now
- van Vugt, D. and Franke, A. (2018), ‘Exploring the yield gap of orange-fleshed sweet potato vari-eties on smallholder farmers’ fields in malawi’, Field Crops Research 221, 245–256.
Paper not yet in RePEc: Add citation now
- Vanlauwe, B., Tittonell, P. and Mukalama, J. (2006), ‘Within-farm soil fertility gradients affect re-sponse of maize to fertiliser application in western kenya’, Nutrient Cycling in Agroecosystems 76(2-3), 171–182.
Paper not yet in RePEc: Add citation now
- Vu, V. Q. (2011), ggbiplot: A ggplot2 based biplot. R package version 0.55.
Paper not yet in RePEc: Add citation now
- Yonah, I., Oteng’i, S. and Lukorito, C. (2006), ‘Assessment of the growing season over the unimodal rainfall regime region of tanzania’, Tanzania Journal of Agricultural Sciences 7(1).
Paper not yet in RePEc: Add citation now
- Zeileis, A., Hothorn, T. and Hornik, K. (2008), ‘Model-based recursive partitioning’, Journal of Com-putational and Graphical Statistics 17(2), 492–514.
Paper not yet in RePEc: Add citation now
- Zheng, H., Chen, L., Han, X., Zhao, X. and Ma, Y. (2009), ‘Classification and regression tree (cart) for analysis of soybean yield variability among fields in northeast china: The importance of phosphorus application rates under drought conditions’, Agriculture, Ecosystems & Environment 132(1-2), 98–105.
Paper not yet in RePEc: Add citation now