2.3 each soil mix convert collected together and pour them onto a plastic cloth. Make mash again by lifting the plastic corner, one at 2 opposite corners. Do switch the 3-4 times. After that, the mounds are hand-fachi elite spanking, then using a flat. Afterward, using fingers to scratch is criss (+) on the top of the stack, which will cause the soil to be segregated into four sections. Collect samples from mounds of this part 1, has a heavy about half a kilogram, or if the soil has been contaminated may be a gravel lot 1-2 kg soil put into plastic bags for analysis.
การแปล กรุณารอสักครู่..