Response of Winter Wheat Grain Yield and Phosphorus Uptake to Foliar Phosphite Fertilization

Table 3

Analysis of variance for grain yield (kg ha⁻¹), grain P concentration (mg kg⁻¹), and P uptake (kg ha⁻¹) in winter wheat as affected by treatments in five fields at three locations (Perkins, Perry, and Morrison, OK), over 2009/10 and 2010/11.

Source of variation	Grain yield (kg ha^−1)	Grain P concentration (mg kg^−1)	P uptake (kg ha^−1)	Productive tillers (no/main shoot)
Location	***$	**	**	*
Year	NS§	*	NS	---^¶
Treatments	*	*	*	*
Location * treatments	NS	NS	NS	NS
Year * treatments	NS	NS	NS	NS
𝑅-Square	0.53	0.74	0.73	0.76

$*, ** & ***: Significant at 𝑃≤0.05, 0.01, and 0.001, respectively; §NS: nonsignificant. ¶Data were available only in 2009/2010 cropping seasons.