Using GreenSeeker® to drive variable rate application of plant growth regulators and defoliants on cotton

G. Vellidis, B. Ortiz, G. Ritchie, A. Peristeropoulos, C. Perry, K. Rucker

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

9 Scopus citations

Abstract

The paper reports on a project designed to evaluate the feasibility of using the GreenSeeker® RT200 mapping system to drive variable rate application (VRA) of plant growth regulators (PGRs) and defoliants on cotton in Georgia, USA. The first year's results indicate that NDVI appears to be very good tool for differentiating management zones early and late in the growing season. At mid-season, when the entire field is covered by a solid green canopy, NDVI values become saturated and are not useful for creating PGR management zones. Several confounding factors prevented us from assessing the effectiveness of using NDVI to manage PGR application. Our results indicate that NDVI seems to be an excellent tool for managing defoliant applications. In the three fields we studied, VRA resulted in 8.4% less, 2.8% less, and 1% more defoliant used. In all 3 cases, defoliation effectiveness was at least as good as or better than a producer-selected constant rate.

Original languageEnglish
Title of host publicationPrecision Agriculture 2009 - Papers Presented at the 7th European Conference on Precision Agriculture, ECPA 2009
Pages55-62
Number of pages8
StatePublished - 2009
Event7th European Conference on Precision Agriculture, ECPA 2009 - Wageningen, Netherlands
Duration: Jul 6 2009Jul 8 2009

Publication series

NamePrecision Agriculture 2009 - Papers Presented at the 7th European Conference on Precision Agriculture, ECPA 2009

Conference

Conference7th European Conference on Precision Agriculture, ECPA 2009
Country/TerritoryNetherlands
CityWageningen
Period07/6/0907/8/09

Keywords

  • Biomass
  • NDVI
  • Vegetation index

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