Evaluation of ground-based hot-spot reflectance measrements for biomass determination of agricultural crops

Evaluation of ground-based hot-spot reflectance measrements for biomass determination of agricultural crops

Bunnik, N.J.J.
Verhoef, W.
de Jongh, R.W.
van Kasteren, H.W.J.
Geerts, R.H.M.E.
Noordman, H.
Uenk, D.
de Boer, T.A.

National Aerospace Laboratory NLR

1984-09-13

Canopy reflectance simulation studies have demonstrated that a simplified relation between leaf area index and reflectance exists for the hot-spot observed at a zenith angle of approximately 52°. Based on this principle a prototype ground-based hot-spot reflectance meter (HSM) has been developed and tested, The objective of the project is to verify the performance for non-destructive determination of biomass and growth stage development of agricultural crops under standardized conditions. During 1982 and 1983 an extensive field measurement programme has been executed. Results obtained in 1983 are discussed. HSM data can be applied for biomass assessment during the vegetative phase. During the generative phase of cereals, change of biomass is detected due to the associated change of canopy colour during ripening and senescence. This new ground-based instrument can be used in agricultural research and for ground truth collection in remote sensing.

http://resolver.tudelft.nl/uuid:9cb107cf-8f84-4b43-a200-5b53b37f7134

Nationaal Lucht- en Ruimtevaartlaboratorium

Campus only

NLR MP 84085 U

Aerospace Engineering Reports

report

(c)1984 National Aerospace Laboratory NLR