biostudies-literatureUnknown14Chang L<h4>Introduction</h4>In precision agriculture, the diagnosis of the nitrogen (N) nutrition status based on the plant phenotype, combined effects of soil types, various agricultural practices, and environmental factors which are essential for plant N accumulation. It helps to assess the N supply for plants at the right time and optimal amount to ensure high N use efficiency thereby reducing the N fertilizer applications to minimize environmental pollution. For this purpose, three different experiments were performed.<h4>Methods</h4>A critical N content (Nc) model was constructed based on cumulative photothermal effect (LTF), Napplications, and cultivation systems on yield and N uptake in pakchoi.<h4>Results and discussion</h4>According to the model, aboveground dry biomass (DW) accumulationFrontiers in plant science1111216https://www.ebi.ac.uk/biostudies/studies/S-EPMC9975592biostudies-literatureStudy on nitrogen demand model in pakchoi (<i>Brassica campestris</i> ssp. <i>Chinensis</i> L.) based on nitrogen contents and phenotypic characteristics.PMC9975592Hameed MKChang LHuang DNiu QXiong XfalseStudy on nitrogen demand model in pakchoi (<i>Brassica campestris</i> ssp. <i>Chinensis</i> L.) based on nitrogen contents and phenotypic characteristics.<h4>Introduction</h4>In precision agriculture, the diagnosis of the nitrogen (N) nutrition status based on the plant phenotype, combined effects of soil types, various agricultural practices, and environmental factors which are essential for plant N accumulation. It helps to assess the N supply for plants at the right time and optimal amount to ensure high N use efficiency thereby reducing the N fertilizer applications to minimize environmental pollution. For this purpose, three different experiments were performed.<h4>Methods</h4>A critical N content (Nc) model was constructed based on cumulative photothermal effect (LTF), Napplications, and cultivation systems on yield and N uptake in pakchoi.<h4>Results and discussion</h4>According to the model, aboveground dry biomass (DW) accumulation2023-01-01T00:00:00Z20232025-05-18T12:53:42.821Z2025-04-05T13:01:31.115ZS-EPMC99755923687558810.3389/fpls.2023.1111216