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...the Minolta SPAD-502 costs about $2600.00. In contrast, the atLEAF is a relatively new chlorophyll meter which can be purchased for one tenth of the cost... We found that the relative chlorophyll reading from SPD-502 and atLEAF meters were highly correlated both to one another and to chlorophyll content determined with spectrophotometry.

A.Gallinat, L. Garrison, R. Primack
Professor richard Primack's Lab at Boston University

Rubber leaves index values observed by SPAD- 502 and atLEAF CHL PLUS were closely correlated, hence both of the devices can substitute each other. In addition, the correlation between atLEAF CHL PLUS and SPAD-502 values with absolute chlorophyll content of clone SP 217, PB 260, GT1, and all clones (general) were significant with a high coefficient of determination (R2) as well as low RMSE and CV. Therefore, both atLEAF CHL PLUS and SPAD-502 can be used to make fast and nondestructive prediction of chlorophyll content of rubber plant leaf.

A N CAHYO^1)2)*), R H MURTI²⁾, E T PUTRA²⁾, T R NURINGTYAS³⁾, D FABRE⁴⁾ , P MONTORO⁴⁾
1) Pusat Penelitian Karet, Palembang 2)Fakultas Pertanian UGM, Sleman, Yogyakarta 3)Fakultas Biologi UGM, Jl. Teknika Selatan,Sleman, Yogyakarta 4)CIRAD, UMR AGAP, Montpellier, France