GB/T 25413-2010Limit and test method for residual quantity of agricultural mulch film (English PDF)

3.1 Film mulchfilm

Used for crop cultivation covered ground plastic film.

3.2 Plastic Film Residue

Soil residues mulch.

5.1 Test conditions and measurement

5.1.1

The test shall be subject to the land, after the plastic film to be broadcast to the pick-up process, the area should not be less than 100m × 50m.

5.1.2

Test vegetation, previous crops and cultivation methods determined according to the provisions of GB/T 5262's.

5.2 test area to determine the location and measuring point

5.2.1

Test to the length and width along the direction of the center line, which is divided into four of the randomly selected two diagonal measurements as two zones, each zone is a measure sample.

5.2.2

measuring point 5-point method, from the measured area four diagonal diagonally were randomly determined 4 in 1/4 to 1/8 diagonal length

Position of the measuring points, plus the intersection of the diagonal as measuring the residual amount of mulch five measurement points.

5.3 determine the size of the measuring point

Each measuring point of the selected area 1m × 1m depth of tillage depth (usually 25cm ~ 30cm).

5.4 Determination of Residual Plastic Film

Length of the two long sides of the survey area five measuring points tillage layer are larger than 2cm residual film fish out, washed with water, place the shade

Cool place to dry, and then use the weighing scales (accuracy not less than 0.01g), according to equation (1) calculate the amount of residual film.

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