Table 2.

Fresh and dry weights of roots and shoots and leaf chlorophyll concentrations of soybean inoculated with Bradyrhizobium japonicum USDA110.

Treatments*	Root fresh weight, g/plant	Shoot fresh weight, g/plant	Root dry weight, g/plant	Shoot dry weight, g/plant	Chlorophyll content, SPAD units
HNHP	6.1 ± 0.7bc	32.5 ± 5.7b	0.55 ± 0.09bcd	6.51 ± 0.56c	40.0 ± 1.41ab
HNHMg	10.0 ± 1.2a	41.8 ± 5.6a	0.86 ± 0.14a	9.63 ± 1.17a	42.5 ± 1.36a
HNLP	7.3 ± 0.8bc	28.8 ± 2.9b	0.60 ± 0.12bc	7.36 ± 0.48bc	35.3 ± 3.28cd
HNLMg	7.8 ± 0.7b	33.3 ± 6.3b	0.64 ± 0.06b	8.44 ± 1.08ab	37.3 ± 3.14bc
LNHP	4.9 ± 0.5cd	13.6 ± 1.4c	0.40 ± 0.07de	3.02 ± 0.50d	35.3 ± 2.70bc
LNHMg	6.4 ± 1.5bc	19.2 ± 0.9c	0.46 ± 0.09e	3.97 ± 0.56d	37.3 ± 2.74bc
LNLP	5.5 ± 1.0cd	13.1 ± 1.3c	0.32 ± 0.07cde	2.92 ± 0.54d	32.4 ± 1.63e
LNLMg	4.3 ± 1.5cd	16.5 ± 0.9c	0.35 ± 0.09e	3.13 ± 0.60d	36.0 ± 1.17cde

Plants were grown for 45 days under hydroponic conditions with nutrient solutions supplemented with combinations of high or low N, P, and Mg concentrations.

^*high N and high P (HNHP), high N and high Mg (HNHMg), high N and low P (HNLP), high N and low Mg (HNLMg), low N and high P (LNHP), low N and high Mg (LNHMg), low N and low P (LNLP), and low N and low Mg (LNLMg). Columns represent means for six plants (N = 6) with standard error bars, and different letters indicate significant differences between treatments at P < 0.05 (Tukey's t-test).