Table 5 Effect of N level on colour
From: Effect of nitrogen application level on cotton fibre quality
Year | Location | Country | N levels in kg· ha−1 | Instrument | Remarks | References |
|---|---|---|---|---|---|---|
1984–1986 | Altus, Oklahoma | US | 0, 56, 112 & 224 | HVI | Fibres becoming less bright, due to a reduction in reflectance (Rd) and an increase in yellowness (+ b), with increased N application rates | Boman and Westerman (1994) |
1991–1992 | Uvalde, Texasa | US | 0, 67, 135, 202 & 269 | HVI | Significant decrease in reflectance (Rd) and an increase in yellowness (+ b), with increased N application rates | Tewolde and Fernandez (2003) |
1992–1996 | Mississippi Delta | US | 101, 135, 168 & 202 | HVI | Fibres becoming significantly less bright, due to a reduction in reflectance (Rd) and an increase in yellowness (+ b), with increased N application rates | Ebelhar et al. (1996) |
1996–1998 | Florence, South Carolina | US | 0, 78 & 112 | HVI | Significant increase in yellowness (+ b), with increased N application rates | Bauer and Roof (2004) |
2005–2006 | Multan, Punjab | Pakistan | 0, 50, 100 & 150 | HVI | No significant differences in either Rd or + b with increased N application levels | Afzal et al. (2018) |
2009–2012 | Stoneville, Mississippi | US | 0, 56 & 112 | HVI | Significant increase in yellowness (+ b), with increased N application rates | Pettigew and Zeng (2014) |
2013 | Stoneville, Mississippi | US | 0, 39, 67, 101, 135 & 168 | HVI | Significant decrease in reflectance (Rd) and an increase in yellowness (+ b), with increased N application rates | Sui et al. (2017) |
2014 | Stoneville, Mississippi | US | 0, 56, 112, 168 & 224 | HVI | Significant decrease in reflectance (Rd) and an increase in yellowness (+ b), with increased N application rates | Sui et al. (2017) |