Evaluation of Image Analysis to Determine the N-Fertilizer Demand of Broccoli Plants (Brassica oleracea convar. botrytis var. italica)

Figure 3

Linear regression between the N concentration in leaf dry matter [%] and the parameter 𝑏^∗ in the wavelength range 516₇₈₀ nm for the broccoli cultivars Parthenon (a) and Marathon (b). A correlation coefficient of 𝑅=0.81 was obtained for Parthenon and 𝑅=0.82 was obtained for Marathon over the tested nitrogen levels.

(a)

(b)