Keywords:









U AV

Correlation between UAV multispectral Imagery and spectroradiometer measurements in

sunower developmental stages











 



 



 

23



2VI

Crop production



 





     













15

Abstract

         

         

        





         

        

      

      

         

          

        

         













    

     



This scientic publication in digital format is a continuation of the Printed Review: Legal Deposit pp 196802ZU42, ISSN 0378-7818.

Rev. Fac. Agron. (LUZ). 2025, 42(2): e254223 April-June. ISSN 2477-9409.

2-6 |

Resumen

        



        

        





           

      



   





         

        



   



          



       





Palabras claves:    



Resumo

  





         







       







        



         





         

   



       



Palavras-chave:    



Introduction





       



     



        

       

et al

        





       



         

        



et

al



       





        

     



     



         







     

     



     

         



         







       

        

       



et al.

        

Helianthus annuus

       



       





 et al.      





 



        







This scientic publication in digital format is a continuation of the Printed Review: Legal Deposit pp 196802ZU42, ISSN 0378-7818.

Erdoğan et al. Rev. Fac. Agron. (LUZ). 2025, 42(2): e254223

3-6 |





et al



         



Material and Method

         



 

         

     







Table 1. Sunower stages are measured by a spectroradiometer

(Field SpecPro 4 High-Res) (Schneiter et al., 1981).

Stage Description







R-3

 





R-5

 

        





Study Area







        



Figure 1. Location of the study area in the Kazova Region of

Tokat Province, Turkey.

          



         

      



Figure 2. Equipment used to determine the coordinates at the

measurement points.    

      





        

         













         

       

       

 











        









 =

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576

=544

 =

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

666

=634

 =

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746

=714

 =

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886

=834

(1)

(2)

(3)



This scientic publication in digital format is a continuation of the Printed Review: Legal Deposit pp 196802ZU42, ISSN 0378-7818.

Rev. Fac. Agron. (LUZ). 2025, 42(2): e254223 April-June. ISSN 2477-9409.

4-6 |

Table 2. Camera Specications (Wong, 2024).

Camera Specications

 











 

          











        



      

       



Figure 3. Orthophotos generated for each band in the eld

research during sunower development. 

 (Schneiter et al., 1981)

Results and discussion

Land Measurement Correlation (Vegetative Stage)

        

       







Table 3. Pearson correlation coecients of the variables compared

at phenological vegetation stage.

G_SPEC R_SPEC RE_SPEC NIR_SPEC

G_UAV

   

R_UAV

   

RE_UAV

   

NIR_UAV

   



           



     



        



       

         



        

       

      





        











Figure 4. Vegetation Stage Land measurement correlation graphs

show the relationship between UAV images and

spectroradiometer measurements.

Land Measurement Correlation (R-3 Stage)







Table 4. Pearson correlation coecients of the variables compared

at phenological R-3 stage.

G_SPEC R_SPEC RE_SPEC NIR_SPEC

G_UAV



  

R_UAV

 

 

RE_UAV

 





NIR_UAV

 

 

             

            



        

        

       

        



        

This scientic publication in digital format is a continuation of the Printed Review: Legal Deposit pp 196802ZU42, ISSN 0378-7818.

Erdoğan et al. Rev. Fac. Agron. (LUZ). 2025, 42(2): e254223

5-6 |





        

      





Figure 6. R-5 Stage Land measurement correlation graphs

show the relationship between UAV images and

spectroradiometer measurements.



   



et al





et al



        

    















Conclusions

        

      





















         

          



         



        

Figure 5. R-3 Stage Land measurement correlation graphs

show the relationship between UAV images and

spectroradiometer measurements.

Land Measurement Correlation (R-5 Stage)







Table 5. Pearson correlation coecients of the variables compared

at phenological R-5 stage.

G_SPEC R_SPEC RE_SPEC NIR_SPEC

G_UAV







R_UAV









RE_UAV









NIR_UAV

  



            



        

       

        





       















This scientic publication in digital format is a continuation of the Printed Review: Legal Deposit pp 196802ZU42, ISSN 0378-7818.

Rev. Fac. Agron. (LUZ). 2025, 42(2): e254223 April-June. ISSN 2477-9409.

6-6 |

        

         





Literature Cited

      Helianthus

annuusFood Science

& Nutrition, 8(9), 4666–4684





       

Dergisi24

         

      

 Harita Dergisi 80  



The





 

6



          

Helianthus annuus

      





             

AgroLife

12

  

    

  19  





         

   10  





        



  48



          

       



9

           

   21  



         

    



           

     







        

Sensing

9