Parameter |
Unit |
Frequency |
Lower |
Upper |
Chemical |
pH |
|
Monthly |
7.5 |
8.5 |
Electrical conductivity |
µS/cm |
Monthly |
750 |
1200 |
Organic matter |
% |
Monthly |
25 |
35 |
C:N ratio |
N/A |
Monthly |
15 |
20 |
Total nitrogen |
% |
Monthly |
0.5 |
1 |
Ammonia-N |
mg/l |
Monthly |
1 |
5 |
Nitrate-N |
mg/l |
Monthly |
15 |
120 |
Total phosphorus |
% |
Monthly |
0.1 |
0.3 |
Water soluble Phosphorus |
mg/l |
Monthly |
4 |
30 |
Total potassium |
% |
Monthly |
0.5 |
0.9 |
Water soluble Potassium |
mg/l |
Monthly |
650 |
1200 |
Water soluble Magnesium |
mg/l |
Monthly |
10 |
30 |
Free carbonate |
% |
Monthly |
1 |
5 |
Moisture content |
% |
Monthly |
35 |
45 |
Bulk density |
g/l |
Monthly |
450 |
550 |
Heavy metals |
Lead |
mg/kg |
Monthly |
|
<200 |
Nickel |
mg/kg |
Monthly |
|
<50 |
Zinc |
mg/kg |
Monthly |
|
<300 |
Copper |
mg/kg |
Monthly |
|
<130 |
Arsenic |
mg/kg |
Monthly |
|
<10 |
Cadmium |
mg/kg |
Monthly |
|
<2 |
Mercury |
mg/kg |
Monthly |
|
<2 |
Chromium |
mg/kg |
Monthly |
|
<100 |
Water soluble Boron |
mg/l |
Monthly |
|
<3 |
Water soluble Chloride |
mg/l |
Monthly |
|
<850 |
Water soluble Sodium |
mg/l |
Monthly |
|
<200 |
Other |
Weed seeds |
|
Quarterly |
|
Absent |
Plant pathogens |
|
Quarterly |
|
Absent |
Herbicides |
|
Quarterly |
|
Absent |
Fungicides |
|
Quarterly |
|
Absent |
Insecticides |
|
Quarterly |
|
Absent |
Salmonella spp |
|
Monthly |
|
Absent in 25 g |
E. coli |
|
Monthly |
|
<1000 cfu/g |
Impurities |
Stones >2mm |
|
Quarterly |
|
Absent |
Plastic, glass, metal >2mm |
|
Quarterly |
|
Absent |
