Soil Testing and Sampling Guidelines

Justin K, a horticulture field specialist, provides an overview of soil testing procedures. He explains how to sample soil based on field size and uniformity, prepare and submit samples, and interpret test results. The video covers fertilizer calculations and best practices for soil testing, emphasizing the importance of continuity in testing and the use of resources for soil and plant testing.

What should be considered when determining the size of the field for soil sampling?

• The type of crops grown

• The uniformity and size of the field

• The weather conditions

• The time of year

How many subsamples should be taken in a given field?

• 30 to 50

• 15 to 30

• 10 to 20

• 5 to 10

Why is it important to label soil samples and draw a farm map?

• To ensure samples are not mixed up

• To comply with legal requirements

• To make the samples look professional

• To identify the source of the soil for recommendations

What information is required on the soil sample submission form?

• Field history, irrigation method, and soil texture

• Sample ID, number of acres, and topography

• Weather conditions, crop type, and soil color

• Owner's name, field location, and soil pH

What is the recommended depth for taking soil samples?

• 6 to 8 inches

• 4 to 6 inches

• 8 to 10 inches

• 2 to 4 inches

What does a soil test report typically include?

• Plant growth rates and pest information

• Soil pH, nutrient levels, and recommendations

• Weather forecasts and crop prices

• Field size and soil color

How should nitrogen be applied for tomato crops according to the recommendations?

• Only at the end of the growing season

• Quarter at planting, then every two weeks

• Half at planting, half at flowering

• All at once at planting

How often is soil testing recommended?

• Every year

• Only when problems arise

• Every two to three years

• Every five years

Why is it recommended to use the same soil lab over time?

• To save money

• To ensure continuity in test values and recommendations

• To get faster results

• To receive discounts on bulk testing

What should be done if no phosphorus or potassium is recommended?

• Retest annually to determine when maintenance fertilizer should be applied

• Switch to a different crop

• Ignore the recommendation

• Apply them anyway