Substrate and cereal residues

Nutriments (%)

pH

C (%)

N (%)

C/N

P (%)

C /P

K (%)

Ca (%)

Mg (%)

Soil

5.09 ± 1.02^c

1.46 ± 0.01^d

0.12 ± 0.01^e

12.18 ± 1.31^e

0.03 ± 0.00^d

48.67 ± 2.83^e

0.67 ± 0.00^a

0.23 ± 0.001^c

0.09 ± 0.00^c

Corn stalks

6.3 ± 1.25^a

47.6 ± 13.17^a

0.55 ± 0.01^b

85.87 ± 9.64^cd

0.58 ± 0.04^a

82.06 ± 21.03^d

0.29 ± 0.03^c

0.13 ± 0.01^d

0.19 ± 0.01^b

Millet straw

6.2 ± 1.13^a

35.27 ± 8.69^c

0.34 ± 0.01^d

101.33 ± 31.54^b

0.3 ± 0.01^c

117.56 ± 43.17^c

0.34 ± 0.04^c

0.23 ± 0.01^c

0.28 ± 0.01^a

Rice straw

6.5 ± 1.34^a

40.13 ± 9.94^b

0.45 ± 0.01^c

89.16 ± 26.47^c

0.31 ± 0.01^c

129.45 ± 51.12^b

0.21 ± 0.06^d

0.37 ± 0.01^b

0.29 ± 0.03^a

Sorghum stalks

6.2 ± 1.21^a

33.11 ± 11.10^c

0.27 ± 00^e

122.62 ± 51.42^a

0.42 ± 0.01^b

78.83 ± 19.68^d

0.31 ± 0.01^c

0.22 ± 0.02^c

0.25 ± 0.01^a