Spad value varies with age and leaf of maize plant and its relationship with grain yield

BMC Research Notes

Table 1 Correlation between different stage and leaf of SPAD value with grain yield

SPAD value at different age	Correlation coefficient (r) with GY (t ha⁻¹)	R²
T1 SPAD 30 DAS	0. 48 **	0.24
T3 SPAD 30 DAS	0. 45 *	0.21
T1 SPAD 60 DAS	0.68 **	0.46
T3 SPAD 60 DAS	0.65 **	0.42
eo SPAD 110 DAS	0.74 **	0.55
e2 SPAD 110 DAS	0.60 **	0.36
eo SPAD 120 DAS	0.78 **	0.61
e2 SPAD 120 DAS	0.74 **	0.55
eo SPAD 130 DAS	0.93 **	0.86
e2 SPAD 130 DAS	0.95 **	0.90
eo SPAD 140 DAS	0.74 **	0.55
e2 SPAD 140 DAS	0.72 **	0.52

^** Correlation is significant at the 0.01 level (2-tailed), *Correlation is significant at the 0.05 level (2-tailed), T1, top most leaf at early growth stage; T3, 2nd leaf from T1; eo, leaf attach with cob, e2, 2nd leaf from eo leaf; DAS, days after sowing; SPAD, soil plant analyzer development

ISSN: 1756-0500