Table 10.

Effect of biochar on the chemical composition of the litter in mg/kg.

Litter mix12	Litter chemical composition
	TKN1	TP2	NH3N3	NO3 N4	pH 5	TC6	Na7	K8	Ca9	Mg10	Cu11
	---------------------------Before placement--------------------------
0% Biochar	12,140	3,810	366	61	7.82	392200	938	5,923	5,777	1,068	127
5% Biochar	16,220	4,170	370	47	8.25	41,5500	1,769	9,428	7,315	1,617	195
10% Biochar	14,460	4,580	367	44	8.47	34,1900	2,327	11,324	8,221	2,357	229
20% Biochar	19,800	12,500	327	53	9.34	35,5000	7,050	29,456	29,087	6,799	631
	-----------------------------At 20 wk----------------------------
0% Biochar	22,527	14,769	4,975	557	8.53	19,5600	3,957	14,627	23,062	2,108	87
5% Biochar	21,670	13,569	4,870	330	8.67	20,5800	4,110	15,207	22,689	2,077	121
10% Biochar	24,947	14,664	4,975	306	8.61	22,1600	4,326	15,596	21,978	2,276	132
20% Biochar	24,419	14,129	5,410	134	8.49	21,0800	4,988	18,416	24,321	2,693	170

¹Total Kjeldah nitrogen.

²Total phosphorous.

³Ammoniacal nitrogen.

⁴Nitrate nitrogen.

⁵pH (-log of hydrogen concentration).

⁶Total carbon.

⁷Sodium.

⁸Potassium.

⁹Calcium.

¹⁰Magnesium.

¹¹Copper.

¹²All litter combinations contained 70% used brooder litter and a complementary level of miscanthus grass to the biochar percentage to achieve 100% mix.