서브메뉴
검색
Multi-Sensor Approaches for Vineyard Management Practices: From Nutrient Sampling to Cropload Assessment
Multi-Sensor Approaches for Vineyard Management Practices: From Nutrient Sampling to Cropload Assessment
Detailed Information
- Material Type
- 단행본
- 0017358468
- Date and Time of Latest Transaction
- 20260202104706
- ISBN
- 9798293825271
- DDC
- 635
- Author
- Trivedi, Manushi Bhargav.
- Title/Author
- Multi-Sensor Approaches for Vineyard Management Practices: From Nutrient Sampling to Cropload Assessment
- Publish Info
- [Sl] : Cornell University, 2025
- Publish Info
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- Material Info
- 125 p
- General Note
- Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
- General Note
- Advisor: Vanden Heuvel, Justine.
- 학위논문주기
- Thesis (Ph.D.)--Cornell University, 2025.
- Abstracts/Etc
- 요약This thesis presents a multi-faceted approach to improve grapevine management through novel, data-driven methodologies aimed at optimizing nutrient sampling, quantifying cropload using physiological traits and tracking in-season cluster closure. A key focus of the study was to evaluate a new nutrient sampling method-termed "box sampling"- developed using remote sensing data from synthetic aperture radar (SAR) and Normalized Difference Vegetation Index (NDVI) imagery. Compared to traditional random and stratified methods, box sampling reduced sampling time and distance by up to 75%, while capturing broader nutrient variability of macro-nutrients across 14 vineyards in New York, Washington, and California. It performed particularly well for nitrogen (N%), Phosphorus (P%), and Magnesium (Mg%), but exhibited limitations for potassium (K%) and calcium (Ca%) due to their high spatial variability. Despite some constraints, box sampling offers a scalable, efficient solution for regional nutrient monitoring.Thesis also describes use of physiological tools such as chlorophyll fluorescence (Fs) and solar-induced fluorescence (SIF) to study the effects of source-sink relationships, particularly crop load. It is often defined as fruit-to-leaf area ratio (FTLR) or proxied by yield to pruning weights ratios called RAVAZ index. A higher FTLR typically indicates increased photosynthesis, suggesting that space-based SIF proxies could map in-season FTLR variation for crop quality optimization. Results demonstrated that both Fs and SIF responded more strongly and consistently to FTLR after veraison. While early-season relationships were weak due to low signal-to-noise ratios of SIF, post-veraison canopy SIF correlated more reliably with FTLR, pruning weights and yield than reflectance-based indices like NDVI.The thesis also introduces a novel computer vision pipeline to quantify and monitor cluster closure (CC)-a key morphological stage in grapevine development-with high accuracy (2% error). Using mobile phone imagery processed through a Pyramid Scene Parsing Network (PSPNet) and Otsu's thresholding, the method effectively captured the timing and progression of CC across three cultivars. The progression curve revealed an asymptotic trend, enabling the proposal of a consistent phenological marker for CC based on when this curve plateaus. This continuous %CC metric lays the groundwork for better understanding of disease susceptibility, cluster compactness, and quality control in viticulture.
- Subject Added Entry-Topical Term
- Horticulture
- Subject Added Entry-Topical Term
- Geographic information science
- Subject Added Entry-Topical Term
- Remote sensing
- Index Term-Uncontrolled
- Cluster closure
- Index Term-Uncontrolled
- Cropload
- Index Term-Uncontrolled
- Solar induced fluorescence
- Index Term-Uncontrolled
- Spatial sampling
- Index Term-Uncontrolled
- Viticulture
- Added Entry-Corporate Name
- Cornell University Horticulture
- Host Item Entry
- Dissertations Abstracts International. 87-03B.
- Electronic Location and Access
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2025 us c eng d■001000017358468
■00520260202104706
■006m o d
■007cr#unu||||||||
■020 ▼a9798293825271
■035 ▼a(MiAaPQ)AAI32117358
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a635
■1001 ▼aTrivedi, Manushi Bhargav.▼0(orcid)0000-0001-9088-1427
■24510▼aMulti-Sensor Approaches for Vineyard Management Practices: From Nutrient Sampling to Cropload Assessment
■260 ▼a[Sl]▼bCornell University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a125 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-03, Section: B.
■500 ▼aAdvisor: Vanden Heuvel, Justine.
■5021 ▼aThesis (Ph.D.)--Cornell University, 2025.
■520 ▼aThis thesis presents a multi-faceted approach to improve grapevine management through novel, data-driven methodologies aimed at optimizing nutrient sampling, quantifying cropload using physiological traits and tracking in-season cluster closure. A key focus of the study was to evaluate a new nutrient sampling method-termed "box sampling"- developed using remote sensing data from synthetic aperture radar (SAR) and Normalized Difference Vegetation Index (NDVI) imagery. Compared to traditional random and stratified methods, box sampling reduced sampling time and distance by up to 75%, while capturing broader nutrient variability of macro-nutrients across 14 vineyards in New York, Washington, and California. It performed particularly well for nitrogen (N%), Phosphorus (P%), and Magnesium (Mg%), but exhibited limitations for potassium (K%) and calcium (Ca%) due to their high spatial variability. Despite some constraints, box sampling offers a scalable, efficient solution for regional nutrient monitoring.Thesis also describes use of physiological tools such as chlorophyll fluorescence (Fs) and solar-induced fluorescence (SIF) to study the effects of source-sink relationships, particularly crop load. It is often defined as fruit-to-leaf area ratio (FTLR) or proxied by yield to pruning weights ratios called RAVAZ index. A higher FTLR typically indicates increased photosynthesis, suggesting that space-based SIF proxies could map in-season FTLR variation for crop quality optimization. Results demonstrated that both Fs and SIF responded more strongly and consistently to FTLR after veraison. While early-season relationships were weak due to low signal-to-noise ratios of SIF, post-veraison canopy SIF correlated more reliably with FTLR, pruning weights and yield than reflectance-based indices like NDVI.The thesis also introduces a novel computer vision pipeline to quantify and monitor cluster closure (CC)-a key morphological stage in grapevine development-with high accuracy (2% error). Using mobile phone imagery processed through a Pyramid Scene Parsing Network (PSPNet) and Otsu's thresholding, the method effectively captured the timing and progression of CC across three cultivars. The progression curve revealed an asymptotic trend, enabling the proposal of a consistent phenological marker for CC based on when this curve plateaus. This continuous %CC metric lays the groundwork for better understanding of disease susceptibility, cluster compactness, and quality control in viticulture.
■590 ▼aSchool code: 0058.
■650 4▼aHorticulture
■650 4▼aGeographic information science
■650 4▼aRemote sensing
■653 ▼aCluster closure
■653 ▼aCropload
■653 ▼aSolar induced fluorescence
■653 ▼aSpatial sampling
■653 ▼aViticulture
■690 ▼a0471
■690 ▼a0370
■690 ▼a0799
■71020▼aCornell University▼bHorticulture.
■7730 ▼tDissertations Abstracts International▼g87-03B.
■790 ▼a0058
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358468▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
Preview
Export
ChatGPT Discussion
AI Recommended Related Books
Detail Info.
- Reservation
- Not Exist
- My Folder
- First Request
- Non-Book Loan Application
- Nighttime Book Loan Application
Available after logging in.


