• The samples are collected 2 to 4 weeks before the application of fertilizer in the crop and, based on these results, develop the fertilization program.

• Divide the farm into uniform lots taking into account: The topography of the area, the depth of the soil, the texture and color of the soil, the age of the crop, and the fertilized and unfertilized lots.

• If the terrain is uniform, a lot can represent an area of 3 to 5 ha.

• If within the same lot there are areas with a history of worse crop performance, delimit the area with these anomalies and take separate samples from the good area and the problem area and identify them correctly.

• At the site where the sample is taken, the first 3 cm to 5 cm of the soil surface are removed to avoid contaminating the sample with solid fertilizer residues, plant materials and stones.

• Areas near the margins of the lot, roads, water inlets or areas where significant soil movements have been carried out should be avoided.

• The samples are collected at a depth of 20 to 30 cm, in the area of greatest exploration of the roots of the plant.

• A sample is made up of 15 to 20 sub-samples, which are taken at random (or zig-zag) throughout the area.

• The collected sub-samples are placed in a bucket and mixed until a homogeneous sample is obtained.

• From this mixture, 1 kg (2 pounds) is collected, which constitutes the sample to be shipped to the laboratory.

NOTE:  To offer you a better service, please send the samples with the "Analysis Request Form" filled with the required information.