. 2018 Jul 23;4(7):e00704. doi: 10.1016/j.heliyon.2018.e00704

Table 4.

Total aboveground cowpea tissue mineral contents (mg) of plants (two per pot) grown in soil amended with each of the experimental soil amendments.

Soil amendment	Ca	Fe	K	Mg	P	Zn
Control	44.3^d	0.29^b	64.4^d	10.9^d	6.3^e	0.10^d
WC	66.5^bcd	0.37^b	83.0^cd	15.2^cd	9.5^cde	0.14^cd
B	55.4^cd	0.43^ab	74.5^cd	13.9^cd	8.7^de	0.13^cd
WC + B	77.5^c	0.53^ab	92.5^bcd	16.7^bcd	12.3^bcd	0.17^abc
NP 100	105.2^a	0.54^ab	76.7^cd	28.0^a	9.5^cde	0.12^cd
B + NP 150	119.5^a	0.72^a	103.7^abc	35.0^a	16.9^a	0.17^abc
B + NP 100	112.1^a	0.72^a	97.3^abcd	31.4^a	13.8^abc	0.15^bcd
B + NP 50	91.8^ab	0.53^ab	92.4^bcd	25.0^abc	15.2^ab	0.16^abc
WC + B + NP 150	113.7^a	0.69^a	117.9^ab	32.2^a	15.6^ab	0.17^abc
WC + B + NP 100	113.5^a	0.67^ab	123.8^a	30.7^a	18.0^a	0.21^a
WC + B + NP 50	107.3^a	0.63^ab	117.8^ab	25.8^ab	15.6^ab	0.20^ab

Soil Amendments: Control = Non-amended, WC = Worm Compost (120 g), B = Biochar (30 g), NP = Commercial Fertilizers (% of Recommended Rate). Data presented as LS means (n = 6). Within a column, values labeled with the same letter do not differ significantly (p < 0.05).