An Approach to Precise Nitrogen Management Using Hand-Held Crop Sensor Measurements and Winter Wheat Yield Mapping in a Mediterranean Environment
Identifieur interne : 000174 ( Main/Exploration ); précédent : 000173; suivant : 000175An Approach to Precise Nitrogen Management Using Hand-Held Crop Sensor Measurements and Winter Wheat Yield Mapping in a Mediterranean Environment
Auteurs : Lucía Quebrajo ; Manuel Pérez-Ruiz ; Antonio Rodriguez-Lizana ; Juan AgüeraSource :
- Sensors (Basel, Switzerland) [ 1424-8220 ] ; 2015.
Abstract
Regardless of the crop production system, nutrients inputs must be controlled at or below a certain economic threshold to achieve an acceptable level of profitability. The use of management zones and variable-rate fertilizer applications is gaining popularity in precision agriculture. Many researchers have evaluated the application of final yield maps and geo-referenced geophysical measurements (e.g., apparent soil electrical conductivity-ECa) as a method of establishing relatively homogeneous management zones within the same plot. Yield estimation models based on crop conditions at certain growth stages, soil nutrient statuses, agronomic factors, moisture statuses, and weed/pest pressures are a primary goal in precision agriculture. This study attempted to achieve the following objectives: (1) to investigate the potential for predicting winter wheat yields using vegetation measurements (the Normalized Difference Vegetation Index—NDVI) at the beginning of the season, thereby allowing for a yield response to nitrogen (N) fertilizer; and (2) evaluate the feasibility of using inexpensive optical sensor measurements in a Mediterranean environment. A field experiment was conducted in two commercial wheat fields near Seville, in southwestern Spain. Yield data were collected at harvest using a yield monitoring system (RDS Ceres II-volumetric meter) installed on a combine. Wheat yield and NDVI values of 3498 ± 481 kg ha−1 and 0.67 ± 0.04 nm nm−1 (field 1) and 3221 ± 531 kg ha−1 and 0.68 ± 0.05 nm nm−1 (field 2) were obtained. In both fields, the yield and NDVI exhibited a strong Pearson correlation, with rxy = 0.64 and
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DOI: 10.3390/s150305504
PubMed: 25756861
PubMed Central: 4435154
Affiliations:
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Sevilla-Utrera km. 1, Seville 41013, Spain; E-Mails:<email>lquebrajo@us.es</email> (L.Q.);<email>arodriguez2@us.es</email> (A.R.-L.)</nlm:aff></affiliation></author><author><name sortKey="Rodriguez Lizana, Antonio" sort="Rodriguez Lizana, Antonio" uniqKey="Rodriguez Lizana A" first="Antonio" last="Rodriguez-Lizana">Antonio Rodriguez-Lizana</name><affiliation><nlm:aff id="af1-sensors-15-05504">Aerospace Engineering and Fluids Mechanics Department, University of Seville, Ctra. Sevilla-Utrera km. 1, Seville 41013, Spain; E-Mails:<email>lquebrajo@us.es</email> (L.Q.);<email>arodriguez2@us.es</email> (A.R.-L.)</nlm:aff></affiliation></author><author><name sortKey="Aguera, Juan" sort="Aguera, Juan" uniqKey="Aguera J" first="Juan" last="Agüera">Juan Agüera</name><affiliation><nlm:aff id="af2-sensors-15-05504">Rural Engineering Department, University of Cordoba, Córdoba 14071, Spain; E-Mail:<email>jaguera@uco.es</email></nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">25756861</idno><idno type="pmc">4435154</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4435154</idno><idno type="RBID">PMC:4435154</idno><idno type="doi">10.3390/s150305504</idno><date when="2015">2015</date><idno type="wicri:Area/Pmc/Corpus">000021</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000021</idno><idno type="wicri:Area/Pmc/Curation">000021</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Curation">000021</idno><idno type="wicri:Area/Pmc/Checkpoint">000067</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Checkpoint">000067</idno><idno type="wicri:Area/Ncbi/Merge">000540</idno><idno type="wicri:Area/Ncbi/Curation">000540</idno><idno type="wicri:Area/Ncbi/Checkpoint">000540</idno><idno type="wicri:Area/Main/Merge">000174</idno><idno type="wicri:Area/Main/Curation">000174</idno><idno type="wicri:Area/Main/Exploration">000174</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">An Approach to Precise Nitrogen Management Using Hand-Held Crop Sensor Measurements and Winter Wheat Yield Mapping in a Mediterranean Environment</title><author><name sortKey="Quebrajo, Lucia" sort="Quebrajo, Lucia" uniqKey="Quebrajo L" first="Lucía" last="Quebrajo">Lucía Quebrajo</name><affiliation><nlm:aff id="af1-sensors-15-05504">Aerospace Engineering and Fluids Mechanics Department, University of Seville, Ctra. Sevilla-Utrera km. 1, Seville 41013, Spain; E-Mails:<email>lquebrajo@us.es</email> (L.Q.);<email>arodriguez2@us.es</email> (A.R.-L.)</nlm:aff></affiliation></author><author><name sortKey="Perez Ruiz, Manuel" sort="Perez Ruiz, Manuel" uniqKey="Perez Ruiz M" first="Manuel" last="Pérez-Ruiz">Manuel Pérez-Ruiz</name><affiliation><nlm:aff id="af1-sensors-15-05504">Aerospace Engineering and Fluids Mechanics Department, University of Seville, Ctra. Sevilla-Utrera km. 1, Seville 41013, Spain; E-Mails:<email>lquebrajo@us.es</email> (L.Q.);<email>arodriguez2@us.es</email> (A.R.-L.)</nlm:aff></affiliation></author><author><name sortKey="Rodriguez Lizana, Antonio" sort="Rodriguez Lizana, Antonio" uniqKey="Rodriguez Lizana A" first="Antonio" last="Rodriguez-Lizana">Antonio Rodriguez-Lizana</name><affiliation><nlm:aff id="af1-sensors-15-05504">Aerospace Engineering and Fluids Mechanics Department, University of Seville, Ctra. Sevilla-Utrera km. 1, Seville 41013, Spain; E-Mails:<email>lquebrajo@us.es</email> (L.Q.);<email>arodriguez2@us.es</email> (A.R.-L.)</nlm:aff></affiliation></author><author><name sortKey="Aguera, Juan" sort="Aguera, Juan" uniqKey="Aguera J" first="Juan" last="Agüera">Juan Agüera</name><affiliation><nlm:aff id="af2-sensors-15-05504">Rural Engineering Department, University of Cordoba, Córdoba 14071, Spain; E-Mail:<email>jaguera@uco.es</email></nlm:aff></affiliation></author></analytic><series><title level="j">Sensors (Basel, Switzerland)</title><idno type="eISSN">1424-8220</idno><imprint><date when="2015">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>Regardless of the crop production system, nutrients inputs must be controlled at or below a certain economic threshold to achieve an acceptable level of profitability. The use of management zones and variable-rate fertilizer applications is gaining popularity in precision agriculture. Many researchers have evaluated the application of final yield maps and geo-referenced geophysical measurements (e.g., apparent soil electrical conductivity-ECa) as a method of establishing relatively homogeneous management zones within the same plot. Yield estimation models based on crop conditions at certain growth stages, soil nutrient statuses, agronomic factors, moisture statuses, and weed/pest pressures are a primary goal in precision agriculture. This study attempted to achieve the following objectives: (1) to investigate the potential for predicting winter wheat yields using vegetation measurements (the Normalized Difference Vegetation Index—NDVI) at the beginning of the season, thereby allowing for a yield response to nitrogen (N) fertilizer; and (2) evaluate the feasibility of using inexpensive optical sensor measurements in a Mediterranean environment. A field experiment was conducted in two commercial wheat fields near Seville, in southwestern Spain. Yield data were collected at harvest using a yield monitoring system (RDS Ceres II-volumetric meter) installed on a combine. Wheat yield and NDVI values of 3498 ± 481 kg ha<sup>−1</sup> and 0.67 ± 0.04 nm nm<sup>−1</sup> (field 1) and 3221 ± 531 kg ha<sup>−1</sup> and 0.68 ± 0.05 nm nm<sup>−1</sup> (field 2) were obtained. In both fields, the yield and NDVI exhibited a strong Pearson correlation, with r<sub>xy</sub> = 0.64 and <italic>p</italic> < 10<sup>−4</sup> in field 1 and r<sub>xy</sub> = 0.78 and <italic>p</italic> < 10<sup>−4</sup> in field 2. The preliminary results indicate that hand-held crop sensor-based N management can be applied to wheat production in Spain and has the potential to increase agronomic N-use efficiency on a long-term basis.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Oksanen, T" uniqKey="Oksanen T">T. Oksanen</name></author></analytic></biblStruct><biblStruct></biblStruct><biblStruct><analytic><author><name sortKey="Raun, W R" uniqKey="Raun W">W.R. Raun</name></author><author><name sortKey="Johnson, G V" uniqKey="Johnson G">G.V. Johnson</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Van Der Burgt, G J H M" uniqKey="Van Der Burgt G">G.J.H.M. Van der Burgt</name></author><author><name sortKey="Oomen, G J M" uniqKey="Oomen G">G.J.M. Oomen</name></author><author><name sortKey="Habets, A S J" uniqKey="Habets A">A.S.J. Habets</name></author><author><name sortKey="Rossing, W A H" uniqKey="Rossing W">W.A.H. 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Guillaume</name></author></analytic></biblStruct></listBibl></div1></back></TEI><affiliations><list></list><tree><noCountry><name sortKey="Aguera, Juan" sort="Aguera, Juan" uniqKey="Aguera J" first="Juan" last="Agüera">Juan Agüera</name><name sortKey="Perez Ruiz, Manuel" sort="Perez Ruiz, Manuel" uniqKey="Perez Ruiz M" first="Manuel" last="Pérez-Ruiz">Manuel Pérez-Ruiz</name><name sortKey="Quebrajo, Lucia" sort="Quebrajo, Lucia" uniqKey="Quebrajo L" first="Lucía" last="Quebrajo">Lucía Quebrajo</name><name sortKey="Rodriguez Lizana, Antonio" sort="Rodriguez Lizana, Antonio" uniqKey="Rodriguez Lizana A" first="Antonio" last="Rodriguez-Lizana">Antonio Rodriguez-Lizana</name></noCountry></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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