Function 4 in 1:
1.PH:4.0-10pH
2.N:0-500mg/L
3.P:0-240mg/L
4.K:0-240mg/L

pH:

1.Put a small amount of soil (1--2g)into the 10ml tube,add 10 ml pure water.
2.Screw the cap tightly and shake the tube for a minute, lay the tube erectly for about 30 minutes
until the stratification appear.
3.Absorb 2ml of clear liquid on the up layer with suction tube then put it into another tube.Drip
1-2 drops of pH coloring solution into the tube and shake it well.
4.Read the color with color chart after 1 minute.

kalium:

1.Put a small amount of soil (1--2g)into the 10ml tube,add 10 ml pure water.
2.Screw the cap tightly and shake the tube for a minute, lay the tube erectly for about 30 minutes
until the stratification appear.
3.Absorb 2ml of clear liquid on the up layer with suction tube then put it into another tube.Drip 1-2
drops of kalium coloring solution into the tube and shake it well.
4.Read the color with color chart after 1 minute.

phosphorus:

1.Put a small amount of soil (1--2g)into the 10ml tube,add 10 ml pure water.
2.Screw the cap tightly and shake the tube for a minute, lay the tube erectly for about 30 minutes
until the stratification appear.
3.Absorb 2ml of clear liquid on the up layer with suction tube then put it into another tube.Drip 1-2
drops of phosphorus coloring solution into the tube and shake it well.
4.Read the color with color chart after 1 minute.

Ammonia nitrogen:

1.Put a small amount of soil (1--2g)into the 10ml tube,add 10 ml pure water.
2.Screw the cap tightly and shake the tube for a minute, lay the tube erectly for about 30 minutes until
the stratification appear.
3. Drip 2ml of activator solution into another empty tube and then absorb 1--2drops of clear liquid
on the up layer with suction tube, put it into tube and shake it well. Wait one minute
4.Drip 1-2 drops of Ammonia nitrogen coloring solution into the tube and shake it well.
5.Read the color with color chart after 10 minute.