Plant Growth and Nutritional Quality Attributes of Basella alba Applied with Variable Rates of Nitrogen Fertilizer at Different Planting Dates under Canadian Maritime Climatic Conditions

Table 3

Analysis of variance values for the main and interaction effects of planting time (PT), nitrogen (N) rate, days after sowing (DAS), and total soil N, nitrate-N, and ammonium-N covariates on plant height, leaf length, stem diameter, and chlorophyll content.

Source of variation	Plant height	Leaf length	Stem diameter	Number of branches	Chlorophyll content
PT	0.15	0.22	0.09	0.32	0.27
N rate	0.54	0.32	0.10	0.63	0.001
PT × N rate	0.04	0.03	0.28	0.03	0.46
DAS	<0.001	<0.001	<0.001	—	<0.001
PT × DAS	<0.001	<0.001	<0.001	—	<0.001
N rate × DAS	0.44	0.62	0.60	—	0.05
PT × N rate × DAS	0.18	0.33	0.71	—	0.39
Total soil N	0.31	0.97	0.74	0.63	0.81
Soil nitrate-N	0.19	0.99	0.87	0.11	0.63
Soil ammonium-N	0.89	0.69	0.20	0.78	0.73

values () of significant effects that require multiple means comparison are shown in bold; values (/0.05–0.1) of significant and marginally significant covariates are underlined.