Correlation coefficient (r) values of growth and yield components of wheat under different nitrogen levels and placements
2004
Burio, U.A. | Oad, F.C. | Agha, S.K. (Sindh Agriculture Univ., Tandojam (Pakistan))
The field experiment was conducted at Student's Experimental Farm, Sindh Agriculture University, Tandojam to observe the correlation coefficient values of growth and yield traits of Kiran-95 wheat variety under different nitrogen levels and placements. Three nitrogen levels (80, 120 and 150 kg ha- 1) were incorporated through broadcast, band application, pop-up and foliar application. It was observed that a unit increase in wheat grain yield was positively associated with plant height (r = 0.431), productive tillers (r = 0.419), spike length (r = 0.757), grains spike-1 (r = 0.860), seed index (r = 0.878) and harvesting index (r = 0.949). However, the grain yield showed non-significant and negative association with flowering days (r = -0.146) and maturity days (r = -0.054). It was concluded that correlation coefficient values should be determined for observing the degree of relationship of plant traits with yield to ensure that these parameters significantly contribute or not and positive contributing traits must be treated under intensive care to achieve yield targets.
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