Net Assimilation Rate and Agronomic Efficiency of Nitrogen in Tartago (Ricinus communis L.) (Euphorbiaceae) in Dry Climate

Figure 3

SPAD units in the culture of Tartago (Ricinus communis L.), in function of four levels of nitrogen. (a) 0 kg(N) ha⁻¹; (b) 20 kg(N) ha⁻¹; (c) 40 kg(N) ha⁻¹; (d) 60 kg(N) ha⁻¹; (e) 80 kg(N) ha⁻¹; (f) 100 kg(N) ha⁻¹; (g) 120 kg(N) ha⁻¹, in Teotitlán de Flores Magón, Oaxaca, Mexico, in 2018.

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