gompertz equation  (Kuang Lung Shing)

Journal: Weed Technology

Article Title: Growth and fecundity of Palmer amaranth escaping glufosinate in cotton with and without grass competition

doi: 10.1017/wet.2024.68

Figure Lengend Snippet: Figure 1. Apical growth of Palmer amaranth plants treated with glufosinate from the No Grass Competition experiments conducted in cotton at Clayton (A) and Rocky Mount (B), NC. Apical growth was modeled with a four-parameter Gompertz equation, except for the Palmer amaranth plants surviving the LPOST application at Rocky Mount, which were modeled with a linear equation. Abbreviations: EPOST, early postemergence (5 cm); LPOST, late postemergence (>10 cm); MPOST, mid-postemergence (7 to 10 cm); NTC, nontreated; WFIC, weed-free nontreated in-crop; WFNC, weed-free nontreated no-crop.

Article Snippet: Palmer amaranth apical and circumferential growth throughout the growing season was modeled using a four-parameter Gompertz equation in SigmaPlot 14.0 (Systat Software, San Jose, CA, USA): y 1⁄4 y0 þ a ðx x0Þ b [3] where y equals growth, y0 equals the y intercept, a equals an upper asymptote, x equals the time in weeks, x0 equals the x intercept, and b equals the slope at x.

Techniques:

Journal: Weed Technology

Article Title: Growth and fecundity of Palmer amaranth escaping glufosinate in cotton with and without grass competition

doi: 10.1017/wet.2024.68

Figure Lengend Snippet: Figure 2. Canopy circumferential growth of Palmer amaranth plants treated with glufosinate from the No Grass Competition experiments conducted in cotton at Clayton (A) and Rocky Mount (B), NC. Circumferential growth was modeled with a four-parameter Gompertz equation, except for the Palmer amaranth plants surviving the EPOST application at Clayton and plants under NTC conditions at Rocky Mount, which were modeled with a linear equation. Abbreviations: EPOST, early postemergence (5 cm); LPOST, late postemergence (>10 cm); MPOST, mid-postemergence (7 to 10 cm); NTC, nontreated; WFIC, weed-free nontreated in-crop; WFNC, weed-free nontreated no-crop.

Article Snippet: Palmer amaranth apical and circumferential growth throughout the growing season was modeled using a four-parameter Gompertz equation in SigmaPlot 14.0 (Systat Software, San Jose, CA, USA): y 1⁄4 y0 þ a ðx x0Þ b [3] where y equals growth, y0 equals the y intercept, a equals an upper asymptote, x equals the time in weeks, x0 equals the x intercept, and b equals the slope at x.

Techniques:

Journal: Weed Technology

Article Title: Growth and fecundity of Palmer amaranth escaping glufosinate in cotton with and without grass competition

doi: 10.1017/wet.2024.68

Figure Lengend Snippet: Figure 3. Apical growth of Palmer amaranth plants treated with glufosinate from the Grass Competition experiments conducted in cotton at Clayton (A) and Rocky Mount (B), NC. Apical growth was modeled with a four-parameter Gompertz equation. Abbreviations: EPOST, early postemergence (5 cm); LPOST, late postemergence (>10 cm); MPOST, mid- postemergence (7 to 10 cm); NTC, nontreated; WFIC, weed-free nontreated in-crop; WFNC, weed-free nontreated no-crop.

Article Snippet: Palmer amaranth apical and circumferential growth throughout the growing season was modeled using a four-parameter Gompertz equation in SigmaPlot 14.0 (Systat Software, San Jose, CA, USA): y 1⁄4 y0 þ a ðx x0Þ b [3] where y equals growth, y0 equals the y intercept, a equals an upper asymptote, x equals the time in weeks, x0 equals the x intercept, and b equals the slope at x.

Techniques:

Journal: Weed Technology

Article Title: Growth and fecundity of Palmer amaranth escaping glufosinate in cotton with and without grass competition

doi: 10.1017/wet.2024.68

Figure Lengend Snippet: Figure 4. Canopy circumferential growth of Palmer amaranth plants treated with glufosinate from the Grass Control experiments conducted in cotton at Clayton (A) and Rocky Mount (B), NC. Circumferential growth was modeled with a four-parameter Gompertz equation, except for the Palmer amaranth plants surviving the MPOST application at Clayton, which were modeled using a linear equation. Abbreviations: EPOST, early postemergence (5 cm); LPOST, late postemergence (>10 cm); MPOST, mid-postemergence (7 to 10 cm); NTC, nontreated; WFIC, weed-free nontreated in-crop; WFNC, weed-free nontreated no-crop.

Article Snippet: Palmer amaranth apical and circumferential growth throughout the growing season was modeled using a four-parameter Gompertz equation in SigmaPlot 14.0 (Systat Software, San Jose, CA, USA): y 1⁄4 y0 þ a ðx x0Þ b [3] where y equals growth, y0 equals the y intercept, a equals an upper asymptote, x equals the time in weeks, x0 equals the x intercept, and b equals the slope at x.

Techniques: Control