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Fig. 6 | Discover Agriculture

Fig. 6

From: Estimation of lettuce shoot nitrogen via a portable spectrophotometer

Fig. 6The alternative text for this image may have been generated using AI.

Relationship between N uptake and A chlorophyll a (Index Spad) and B chlorophyll b (Index Spad), obtained using a non-destructive method (chlorophyll meter SPAD), in a greenhouse experiment, with lettuce plants, under six levels of N application. The measurements were taken in three times: 20, 23 and 26 days after transplanting (DAT). Error bars mean the standard deviation (n = 4)

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