Nondestructive estimation of bok choy nitrogen status with an active canopy sensor in comparison to a chlorophyll meter

Pedosphere ◽  
2020 ◽  
Vol 30 (6) ◽  
pp. 769-777 ◽  
Author(s):  
Rongting JI ◽  
Weiming SHI ◽  
Yuan WANG ◽  
Hailin ZHANG ◽  
Ju MIN
Keyword(s):  
Nitrogen Status ◽  
Chlorophyll Meter ◽  
Nondestructive Estimation

Chlorophyll meter predicts nitrogen status of tall fescue

1996 ◽  
Vol 19 (6) ◽  
pp. 881-889 ◽  
Author(s):  
R. V. Kantety ◽  
Edzard van Santen ◽  
F. M. Woods ◽  
C. W. Wood
Keyword(s):  
Tall Fescue ◽  
Nitrogen Status ◽  
Chlorophyll Meter

scholarly journals Evaluation of the Use of SPAD-502 Chlorophyll meter for non-destructive estimation of nitrogen status of tea leaf (Camellia sinensis L. Kuntze)

2019 ◽  
Author(s):  
Wahono A. Wahono ◽  
D. Indradewa ◽  
B. H. Sunarminto ◽  
E. Haryono ◽  
D. Prajitno
Keyword(s):  
Nitrogen Content ◽  
Nitrogen Fertilizer ◽  
Nutrient Management ◽  
Leaf Nitrogen ◽  
Leaf Nitrogen Content ◽  
Nitrogen Status ◽  
Chlorophyll Meter ◽  
Leaf N Content ◽  
Tea Leaf ◽  
Spad Readings

Efficient nutrient management requires estimating factual fertilizer requirements. This study was aimed to test the use of chlorophyll meter SPAD-502 to estimate the nitrogen status of tea maintenance leaf. The test was carried out by correlating the SPAD readings with destructively measured leaf nitrogen content using samples oGbtained from nitrogen fertilizer dosage experiments. Observations were made at 15, 32, 45 and 62 days after the application of N fertilizer treatments. The results showed that the SPAD readings and total nitrogen leaf content correlated significantly with the time of observation. Estimation of leaf N content based on the SPAD readings follows linear line equation y = 0.0311x + 1.5856 with coefficient determinant (R²) = 0.62 significantly at P less than 0.01. It was concluded that SPAD-502 chlorophyll meter is reliable to assess the leaf nitrogen content of tea maintenance leaf and is adequate to predict future nitrogen fertilizer requirements.

Indicators for diagnosing nitrogen status of rice based on chlorophyll meter readings

2016 ◽  
Vol 185 ◽  
pp. 12-20 ◽  
Author(s):  
Zhaofeng Yuan ◽  
Syed Tahir Ata-Ul-Karim ◽  
Qiang Cao ◽  
Zhenzhou Lu ◽  
Weixing Cao ◽  
...  
Keyword(s):  
Nitrogen Status ◽  
Chlorophyll Meter

scholarly journals Establishing dynamic thresholds for potato nitrogen status diagnosis with the SPAD chlorophyll meter

2015 ◽  
Vol 14 (1) ◽  
pp. 190-195 ◽  
Author(s):  
Hong-li ZHENG ◽  
Yan-chun LIU ◽  
Yong-lin QIN ◽  
Yang CHEN ◽  
Ming-shou FAN
Keyword(s):  
Nitrogen Status ◽  
Chlorophyll Meter
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