Fertilizer quantity calculation |
Soils provision scale with nitrate nitrogen (N-NO3), mobile phosphorus(P2O5), exchange potassium (K2O), mg/kg of soil
Soils provision | N-NO3 |
P2O5 |
K2O |
By Kirsanov |
By Machigin |
By Chirikov |
By Kirsanov |
By Machigin |
By Chirikov |
Very low supply |
< 5 |
< 25 |
< 10 |
< 20 |
< 40 |
< 50 |
< 20 |
Low supply |
5 - 10 |
26 - 50 |
11 - 15 |
21 - 50 |
41 - 80 |
51 - 100 |
21 - 40 |
Average provision |
10 - 15 |
51 - 100 |
16 - 30 |
51 - 100 |
81 - 120 |
101 - 200 |
41 - 80 |
Increased security |
15 - 20 |
101 - 150 |
31 - 45 |
101 - 150 |
121 - 170 |
201 - 300 |
81 - 120 |
High security |
> 20 |
151 - 250 |
46 - 60 |
151 - 200 |
171 - 250 |
301 - 400 |
121 - 180 |