LaMotte NPK Soil Test Kit — 50 Tests, Classroom-Ready N-P-K Nutrient Checks with Nonhazardous TesTab Reagents

The LaMotte NPK Soil Test Kit is a classroom- and garden-ready kit that performs 50 safe, hands-on tests to measure soil nitrogen (N), phosphorus (P), and potassium (K) using nonhazardous TesTab reagents.

This compact kit supplies educators, hobby gardeners, and citizen scientists with everything needed for repeated field or lab soil nutrient checks without hazardous chemicals. Tests are simple to follow, include diagrammed instructions and a laminated color chart for quick result interpretation, and were developed to meet The GLOBE Program standards for environmental learning. The kit focuses exclusively on the primary macronutrients (N, P, K) and does not include a soil pH test.

How easy is it to run a test with this kit?

LaMotte designed the kit for straightforward, low-mess testing that works in classrooms, community projects, or backyard settings. Each test uses pre-measured, nonhazardous TesTab reagents so users avoid handling concentrated chemicals.

• Includes all needed apparatus for 50 complete tests—no extra lab gear required.
• Step-by-step, diagrammed instructions reduce setup time and user error.
• Laminated color chart gives fast visual comparison for each nutrient.

What nutrients does the kit measure and how reliable are the results?

The kit specifically measures levels of nitrogen, phosphorus, and potassium—the three primary macronutrients that influence plant growth. Results are qualitative-to-semiquantitative, suitable for monitoring trends, classroom experiments, and practical garden decisions rather than high-precision laboratory analysis.

• Nitrogen test indicates available nitrogen trends relevant to fertilization timing.
• Phosphorus and potassium tests help compare relative nutrient status between samples.
• Best for field-scale comparisons, teaching exercises, and citizen science aligned with The GLOBE Program.

What is included and what should I not expect from this kit?

The kit comes ready to use with apparatus and supporting materials for safety and accurate reading, but it intentionally excludes a soil pH test. If you need pH, order a separate kit or a combined soil analysis product.

• Included: TesTab reagents for N, P, K; testing apparatus; diagrammed instructions; laminated color chart; supplies for 50 tests.
• Not included: soil pH testing components or laboratory-grade quantitative instruments.
• Safety: uses nonhazardous reagents, making it suitable for classroom use.

Who is this for? The LaMotte NPK Soil Test Kit is ideal for educators, extension agents, community science leaders, and hands-on gardeners who need a safe, repeatable way to assess soil nutrient trends. It’s particularly useful in teaching environments and GLOBE-aligned projects where learning, safety, and ease of interpretation are priorities rather than laboratory-level precision.