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Chemical and Biological Technologies in Agriculture

Table 1 Elemental composition of the humic acid samples used

From: Separation of acid-soluble constituents of soil humic acids by dissolution in alkaline urea solution and precipitation with acid

Humic acid

Asha (g kg−1)

Elemental compositionb (g kg−1)

C

H

N

S

O

Fujisaki

9.6

530

51.7

56.2

7.4

355

Dando

6.7

530

52.5

44.9

2.9

369

Takizawa

6.7

568

41.0

39.5

2.5

349

  1. aOn a moisture-free basis
  2. bOn a moisture and ash-free basis
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