doi:10.48130/CAS-2023-0007

[1]

Hall JB, Aebischer DP, Tomlinson HF. 1996. Vitellaria paradoxa: a monograph. Publication Number 8. Bangor, UK: School of Agricultural and Forest Sciences, University of Wales.

[2]

Boffa JM, Taonda SJB, Dickey JB, Knudson DM. 2000. Field-scale influence of karité (Vitellaria paradoxa) on sorghum production in the Sudan zone of Burkina Faso. Agroforesty Systems 49:153−75

doi: 10.1023/A:1006389828259

[3]

Boffa JM. 2015. Opportunities and challenges in the improvement of the shea (Vitellaria paradoxa) resource and its management. Occasional Paper 24. Nairobi: World Agroforestry Centre.

[4]

Naughton CC, Lovett PN, Mihelcic JR. 2015. Land suitability modeling of shea (Vitellaria paradoxa) distribution across sub-Saharan Africa. Applied Geography 58:217−27

doi: 10.1016/j.apgeog.2015.02.007

[5]

Ajayi AOO. 2015. Comparative analysis of the nutritional qualities of seeds of shea nut (Butyrospermum parkii and Theobroma cacao). British Journal of Applied Science & Technology 5:210−16

[6]

Bonkoungou GJE, Raynal DJ, Geis JW. 1983. Tree population dynamics in relation to climate and forest history in the Oswegatchie Plains, northern New York. Vegetatio 54:37−59

doi: 10.1007/BF00036080

[7]

Pouliot M, Elias M. 2013. To process or not to process? Factors enabling and constraining shea butter production and income in Burkina Faso Geoforum 50:211−20

doi: 10.1016/j.geoforum.2013.09.014

[8]

Sanou H, Kambou S, Teklehaimanot Z, Dembélé M, Yossi H, et al. 2004. Vegetative propagation of Vitellaria paradoxa by grafting. Agroforestry Systems 60:93−99

doi: 10.1023/B:AGFO.0000009408.03728.46

[9]

Odoi J, Odong T, Okia C, Okao M, Kabasindi H, et al. 2021. Variation in Seed germination and seedling growth in five populations of Vitellaria paradoxa C.F. Gaertn. Subsp. Nilotica in Uganda. Agricultural Sciences 12:769−82

doi: 10.4236/as.2021.127050

[10]

Shi MZ, Wen QW. 2010. African shea butter, an oil-bearing tree that is tolerant of heat and drought. Yunnan Forest 31(5):48

[11]

Lovett P. 2004. The shea butter value chain: production, transformation & marketing in west Africa. West African Trade Hub Technical Report No. 2. Accra, Ghana. www.atradehub.com/index.php

[12]

Kelly BA, Gourlet-Fleury S, Bouvet JM. 2007. Impact of agroforestry practices on the flowering phenology of Vitellaria paradoxa in parklands in southern Mali. Agroforestry Systems 71:67−75

doi: 10.1007/s10457-007-9074-5

[13]

Masters ET, Yidana JA, Lovett PN. 2004. Reinforcing sound management through trade: Shea tree products in Africa. Unasylva 219

[14]

Coulibaly Y, Ouédraogo S, Niculescu N. 2009. Experimental study of shea butter extraction efficiency using a centrifugal process. Journal of Engineering & Applied Sciences 4(6):14−19

[15]

Ramsay A, Williams AR, Thamsborg SM, Mueller-Harvey I. 2016. Galloylated proanthocyanidins from shea (Vitellaria paradoxa) meal have potent anthelmintic activity against Ascaris suum. Phytochemistry 46(122):146−53

doi: 10.1016/j.phytochem.2015.12.005

[16]

Lamien N, Tigabu M, Guinko S, Oden PC. 2007. Variations in dendrometric and fruiting characters of Vitellaria paradoxa populations and multivariate models for estimation of fruit yield. Agroforestry Systems 69:1−11

doi: 10.1007/s10457-006-9013-x

[17]

Ugese FD, Baiyeri PK, Mbah BN. 2010. Agroecological variation in the fruits and nuts of shea butter tree (Vitellaria paradoxa C.F. Gaertn.) in Nigeria. Agroforesty Systems 79:201−211

doi: 10.1007/s10457-009-9261-7

[18]

Stout JC, Nombre I, de Bruijn B, Delaney A, Doke DA, et al. 2018. Insect pollination improves yield of Shea (Vitellaria paradoxa subsp. paradoxa) in the agroforestry parklands of West Africa. Journal of Pollination Ecology 22:11−20

doi: 10.26786/1920-7603(2018)two

[19]

Wang HH, De HL, Zhang YH, Yang LT, Bai XC. 2004. Vertical differentiation characteristics of mountain soil resources in Yuanjiang dry-hot valley and its rational utilization. Resource Science 26(2):123−28

[20]

Zhang JL. 2007. Phenology, leaf structure and function of woody plants in the dry-hot valley of Yuanjiang and seasonal changes of photosynthesis. PhD Thesis. Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Xishuangbanna, China.

[21]

Emilio T, Quesada CA, Costa FRC, Magnusson WE, Schietti J, et al. 2014. Soil physical conditions limit palm and tree basal area in Amazonian forests. Plant Ecology Diversity 7:215−29

doi: 10.1080/17550874.2013.772257

[22]

Guo L, Bo HU, Dai JH, Xu JC. 2014. Response of chestnut flowering in Beijing to photosynthetically active radiation variation and change in recent fifty years. Plant Diversity and Resources 27(7):25

[23]

Hladyz S, Cook RA, Petrie R, Nielsen DL. 2011. Influence of substratum on the variability of benthic biofilm stable isotope signatures: implications for energy flow to a primary consumer. Hydrobiologia 664:135−146

doi: 10.1007/s10750-010-0593-0

[24]

Lindgren F, Geladi P, Berglund A, Sjöström M, Wold S. 1995. Interactive variable selection (IVS) for PLS. Part 2: Chemical applications. Journal of Chemometrics 9:331−42

doi: 10.1002/cem.1180090502

[25]

Eriksson L, Johansson E, Kettanah-Wold NWS. 1999. Introduction to multi- and megavariate data analysis using projection methods (PCA and PLS-DA). Projection Methods (PCA & PLS). Umetrics AB, Umea, Sweden.

[26]

Nokels L, Fahmy T, Crochemore S. 2010. Interpretation of the preferences of automotive customers applied to air conditioning supports by combining GPA and PLS regression. In Handbook of partial least squares: Concepts, methods and applications, eds. Esposito Vinzi V, Chin WW, Henseler J, Wang H. Berlin: Springer Heidelberg. pp. 775−89. https://doi.org/10.1007/978-3-540-32827-8_34

[27]

Ranjitkar S, Luedeling E, Shrestha KK, Guan K, Xu J. 2013. Flowering phenology of tree rhododendron along an elevation gradient in two sites in the Eastern Himalayas. International Journal Of Biometeorology 57:225−40

doi: 10.1007/s00484-012-0548-4

[28]

Martens H, Naes T. 1989. Multivariate Calibration. London: John Wiley and Sons Ltd.

[29]

Næs T, Isaksson T, Fearn T. 2002. A user-friendly guide to multivariate calibration and classification. Chichester, UK: Nir Publications.

[30]

Seyfried MS, Schwinning S, Walvoord MA, Pockman WT, Newman BD, et al. 2005. Ecohydrological control of deep drainage in arid and semiarid regions. Ecology 86:277−87

doi: 10.1890/03-0568

[31]

Nyarko G, Mahunu GK, Chimsah FA, Yidana F, Poudyal M. 2012. Leaf and fruit characteristics of Shea (Vitellaria paradoxa) in Northern Ghana. Research in Plant Biology 2(3):38−45

doi: 10.1055/s-0028-1108573

[32]

Kelly BA, Poudyal M, Bouvet JM. 2018. Variation of Vitellaria paradoxa phenophases along the north-south gradient in Mali. Research in Plant Biology 8:5−12

doi: 10.25081/ripb.2018.v8.3466

[33]

Glèlè Kakaï RG, Akpona TJ, Assogbadjo A, Gaoue O, Chakeredza S, et al. 2011. Ecological adaptation of the shea butter tree (Vitellaria paradoxa C.F. Gaertn.) along climatic gradient in Bénin, West Africa. African Journal of Ecology 49:440−49

doi: 10.1111/j.1365-2028.2011.01279.x

[34]

Buba AE, Koch S, Kunz H, Löwe H. 2013. Fluorenylmethoxycarbonyl-N-methylamino acids synthesized in a flow tube-in-tube reactor with a liquid-liquid semipermeable membrane. European Journal of Organic Chemistry 5:4509−13

doi: 10.1002/ejoc.201300705

[35]

Byakagaba P, Eilu G, Okullo JBL, Mwavu EN, Tumwebaze SB. 2012. Shea butter tree (Vitellaria paradoxa Gaertn.) fruit yield in relation to dendrometric traits and land-use in Uganda. Research Journal of Applied Sciences 7:92−99

doi: 10.3923/rjasci.2012.92.99

[36]

Nyoka BI, Chanyenga T, Mng'Omba SA, Akinnifesi FK, Sagona W. 2015. Variation in growth and fruit yield of populations of Sclerocarya birrea (A. Rich.) Hochst. Agroforesty Systems 89:397−407

doi: 10.1007/s10457-014-9774-6

[37]

Sumida A, Miyaura T, Torii H. 2013. Relationships of tree height and diameter at breast height revisited: analyses of stem growth using 20-year data of an even-aged Chamaecyparis obtusa stand. Tree Physiology 33:106−18

doi: 10.1093/treephys/tps127

[38]

Aleza K, Villamor GB, Nyarko BK, Wala K, Akpagana K. 2018. Shea (Vitellaria paradoxa Gaertn C.F.) fruit yield assessment and management by farm households in the Atacora district of Benin. PLoS ONE 13:e0190234

doi: 10.1371/journal.pone.0190234

[39]

Kuss FR. 1986. A review of major factors influencing plant-responses to recreation impacts. Environmental Management 10:637−50

doi: 10.1007/BF01866768

[40]

Okullo JBL, Hall JB, Obua J. 2004. Leafing, flowering and fruiting of Vitellaria paradoxa subsp. nilotica in savanna parklands in Uganda. Agroforesty Systems 60:77−91

doi: 10.1023/B:AGFO.0000009407.63892.99

[41]

Peng J, Gou X, Chen F, Fang K, Zhang F. 2010. Influences of slope aspect on the growth of Sabina przewalskii along an elevation gradient in Qinghai Province, China. Chinese Journal of Plant Ecology 34(5):517−25

doi: 10.3773/j.issn.1005-264x.2010.05.005

[42]

Mccutchan MH, Fox DG. 1986. Effect of elevation and aspect on wind, temperature and humidity. Journal of Applied Meteorology 25:1996−2013

doi: 10.1175/1520-0450(1986)0251996:eoeaao>2.0.co;2

[43]

Toma B. 2013. Relationships between stem diameter at breast height (DBH), tree height, crown length, and crown ratio of Vitellaria paradoxa C.F. Gaertn in the Nigerian Guinea Savanna. African Journal of Biotechnology 12(22):3441−46

[44]

Sanogo K, Gebrekirstos A, Bayala J, Villamor GB, Kalinganire A, et al. 2016. Potential of dendrochronology in assessing carbon sequestration rates of Vitellaria paradoxa in southern Mali, West Africa. Dendrochronologia 40:26−35

doi: 10.1016/j.dendro.2016.05.004

[45]

Dodiomon S, Karidia T, Djakalia O. 2012. Precocity and lateness of shea tree fruit production. Journal of Applied Bioscience 52:3676−84

[46]

Bondé L, Ouédraogo O, Traoré S, Thiombiano A, Boussim JI. 2019. Impact of environmental conditions on fruit production patterns of shea tree (Vitellaria paradoxa C.F. Gaertn) in West Africa. African Journal of Ecology 57(3):353−62

doi: 10.1111/aje.12621

[47]

Fold N. 2014. Opportunities and constraints to local and international trade in sheabutter. Structural Engineering & Mechanics 51(2):299−313

doi: 10.12989/sem.2014.51.2.299

[48]

Allal F, Sanou H, Millet L, Vaillant A, Camus-Kulandaivelu L, et al. 2011. Past climate changes explain the phylogeography of Vitellaria paradoxa over Africa. Heredity 107:174−86

doi: 10.1038/hdy.2011.5

[49]

Ranjitkar S, Sujakhu NM, Lu Y, Wang Q, Wang M, et al. 2016. Climate modelling for agroforestry species selection in Yunnan Province, China. Environmental Modelling & Software 75:263−72

doi: 10.1016/j.envsoft.2015.10.027

[50]

Bazié P, Ky-Dembele C, Jourdan C, Roupsard O, Zombré G, et al. 2019. Synchrony in the phenologies of fine roots and leaves of Vitellaria paradoxa in different land uses of Burkina Faso. Agroforestry System 93:449−60

doi: 10.1007/s10457-017-0135-0

[51]

Davis MA, Chew MK, Hobbs RJ, Lugo AE, Ewel JJ, et al. 2011. Don't judge species on their origins. Nature 474:153−54

doi: 10.1038/474153a