Estimating leaf area index in tree species using the PocketLAI smart app

Applied Vegetation Science

Volumn 18, Issue 4, 2015, Pages 716-723

  Orlando, Francesca ^a   Movedi, Ermes ^a   Paleari, Livia ^a   Gilardelli, Carlo ^a   Foi, Marco ^a   Dell'Oro, Michele ^a   Confalonieri, Roberto ^a  

^a UNIVERSITY OF MILAN   (Italy)

Author keywords

Broad leaf; Conifer; Hemispherical photography; Leaf area index; Shrub; Smart app; Tree

Indexed keywords

EID: 84941181679     PISSN: 14022001     EISSN: 1654109X     Source Type: Journal    
DOI: 10.1111/avsc.12181     Document Type: Article

References (27)

1. Baret, F., de Solan, B., Lopez-Lozano, R., Ma, K. & Weiss, M. 2010. GAI estimates of row crops from downward looking digital photos taken perpendicular to rows at 57.5° zenith angle: theoretical considerations based on 3D architecture models and application to wheat crops. Agricultural and Forest Meteorology 150: 1393-1401.
2. Cheetham, A.H. & Hazel, J.E. 1969. Binary (presence-absence) similarity coefficients. Journal of Paleontology 43: 1130-1136.
3. Confalonieri, R., Foi, M., Casa, R., Aquaro, S., Tona, E., Peterle, M., Boldini, A., De Carli, G., Ferrari, A., (..) & Acutis, M. 2013. Development of an app for estimating leaf area index using a smartphone. Trueness and precision determination and comparison with other indirect methods. Computers and Electronics in Agriculture 96: 67-74.
4. Confalonieri, R., Francone, C., Chiodini, M.E., Cantaluppi, E., Caravati, L., Colombi, V., Fantini, D., Giglieno, I., Gilardelli, C., (..) & Acutis, M. 2014. Any chance to evaluate in vivo field methods using standard protocols? Field Crops Research 161: 128-136.
5. Cormark, R.M. 1971. A review of classification. Journal Royal Statistical Society, Series A 134: 321-367.
6. Francone, C., Pagani, V., Foi, M., Cappelli, G. & Confalonieri, R. 2014. Comparison of leaf area index estimates by ceptometer and PocketLAI smart app in canopies with different structures. Field Crops Research 155: 38-41.
7. Garrigues, S., Shabanov, N.V., Swanson, K., Morisette, J.T., Baret, F. & Myneni, R.B. 2008. Intercomparison and sensitivity analysis of Leaf Area Index retrievals form LAI-2000, AccuPAR, and digital hemispherical photography over croplands. Agricultural and Forest Merteorology 148: 1193-1209.
8. Gower, S.T. & Norman, J.M. 1991. Rapid estimation of leaf area index in conifer and broad-leaf plantations. Ecology 72: 1896-1900.
9. Grubbs, F.E. 1950. Sample criteria for testing outlying observations. Annals of Mathematical Statistics 21: 27-58.
10. Huete, A.R. & Tucker, C.J. 1991. Investigation of soil influences in AVHRR red and near-infrared vegetation index imagery. International Journal of Remote Sensing 12: 1223-1242.
11. Hyer, E.J. & Goetz, S.J. 2004. Comparison and sensitivity analysis of instruments and radiometric methods for LAI estimation: assessments from a boreal forest site. Agricultural and Forest Meteorology 122: 157-174.
12. Jonckheere, I., Fleck, S., Nackaerts, K., Muys, B., Coppin, P., Weiss, M. & Baret, F. 2004. Review of methods for in situ leaf area index determination. Part I. Theories, sensors and hemispherical photography. Agricultural and Forest Meteorology 121: 19-35.
13. Jørgensen, S.E., Kamp-Nielsen, L., Christensen, T., Windolf-Nielsen, J. & Westergaard, B. 1986. Validation of a prognosis based upon a eutrophication model. Ecological Modelling 32: 165-182.
14. Khabba, S., Duchemin, B., Hadria, R., Ezzahar, J., Chehbouni, A., Lahrouni, A. & Hanich, L. 2009. Evaluation of digital hemispherical photography and plant canopy analyser for measuring Vegetation area index of orange orchards. Journal of Agronomy 8: 67-72.
15. Liu, C., Kang, S., Li, F., Li, S. & Du, T. 2013. Canopy leaf area index for apple tree using hemispherical photography in arid region. Scientia Horticulturae 164: 610-615.
16. Loague, K. & Green, R.E. 1991. Statistical and graphical methods for evaluating solute transport models: overview and application. Journal of Contaminant Hydrology 7: 51-73.
17. Macfarlane, C., Coote, M., White, D.A. & Adams, M.A. 2000. Photographic exposure affects indirect estimation of leaf area in plantations of Eucalyptus globulus Labill. Agricultural and Forest Meteorology 100: 155-168.
18. Macfarlane, C., Hoffman, M., Eamus, D., Kerp, N., Higginson, S., McMurtrie, R. & Adams, M. 2007. Estimation of leaf area index in eucalypt forest using digital photography. Agricultural and Forest Meteorology 143: 176-188.
19. Nash, J.E. & Sutcliffe, J.V. 1970. River flow forecasting through conceptual models part I. A discussion of principles. Journal of Hydrology 10: 282-290.
20. Rich, P.M., Clark, D.B., Clark, D.A. & Oberbauer, S.F. 1993. Long-term study of solar radiation regimes in a tropical wet forest using quantum sensors and hemispherical photography. Agricultural and Forest Meteorology 65: 107-127.
21. Schaeffer, D.L. 1980. A model evaluation methodology applicable to environmental assessment models. Ecological Modelling 8: 275-295.
22. Sneath, P.H.A. & Sokal, R.R. 1973. Numeric taxonomy: the principles and practice of numerical classification, pp. 573. W.H. Freeman, San Francisco, CA, US.
23. Spath, H. 1985. Cluster dissection and analysis: theory, FORTRAN programs, examples. Halsted Press, New York, NY, US.
24. Tang, H., Dubayah, R., Brolly, M., Ganguly, S. & Zhang, G. 2014. Large-scale retrieval of leaf area index and vertical foliage profile from the spaceborne waveform lidar (GLAS/ICESat). Remote Sensing of Environment 154: 8-18.
25. Warren-Wilson, J. 1963. Estimation of foliage denseness and foliage angle by inclined point quadrats. Australian Journal of Botany 11: 95-105.
26. Weiss, M., Baret, F., Smith, G.J., Jonckheere, I. & Coppin, P. 2004. Review of methods for in situ leaf area index (LAI) determination. Part II. Estimation of LAI, errors and sampling. Agricultural and Forest Meteorology 121: 37-53.
27. Whitford, K.R., Colquhoun, I.J., Lang, A.R.G. & Harper, B.M. 1995. Measuring leaf area index in a sparse eucalypt forest: a comparison of estimates from direct measurement, hemispherical photography, sunlight transmittance and allometric regression. Agricultural and Forest Meteorology 74: 237-249.