Table 1.

Characteristics of biological indicators of Cambisols’ condition.

No	Biological Indicators	Measure Unit	Methods
1	total number of bacteria	109 bacteria in gram of dry soil weight	luminescent microscopy with the solution of acridine orange, 40×
2	Azotobacter sp. abundance	% of the mud balls surrounded by Azotobacter mucus	the method of fouling lumps on the Ashby medium
3	catalase activity	ml O2 per gram of soil dry weight in 1 min.	by the rate of decomposition of hydrogen peroxide
4	dehydrogenases activity	mg of triphenylformazane per gram of dry soil weight for hour	according to the rate of conversion of triphenyltetrazolium chloride (TPC) to triphenylformazane (TPF)
5	the germination rate of radish seeds	% of germination seeds of control	germination of radish (Raphanus sativus L.) after 7 days of the experiment
6	the length of the radish roots	millimeters	of length of the roots in radish (Raphanus sativus L.) after 7 days of the experiment