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

Figure 2

Reflectance changes of broccoli cv. Parthenon (a) and Marathon (b) for different N fertilizer levels over a period of 6 weeks (T1–T6) indicated by the 𝑏^∗ parameter in the wavelength range 516₇₈₀ nm. Significant differences (𝛼=0.05) are indicated between N rates at the different measurement dates (T1 = after planting−T6 = harvest).

(a)

(b)