Plant tissue testing provides essential information concerning plant use of nutrients vital to their growth. These simplified field tests for green plant tissue indicate whether growing plants are receiving adequate amounts of available nutrients from the soil. All tests give qualitative results for the specific nutrients. By comparing test results from healthy and problem plants, it is possible to pinpoint deficiencies or excessive nutrient conditions.
A complete kit for determining nitrates, phosphorus and potassium in plant tissue. Diced green plant tissue is saturated in a Universal Extracting Solution to prepare a single liquid extract for use with all three tests. Qualitative results given as abundant, adequate, deficient only. Reagents for 50 tests per factor.
This copper test kit tests for copper using the LRC Comparator. Range and sensitivity is 0, 0.05, 0.10, 0.15, 0.20, 0.30, 0.40, 0.50 ppm Cu.
This kit tests for QAC using the Direct Reading Titrator method. Range and sensitivity is 0-500 ppm/10 ppm Alkyl dimethyl benzyl ammonium chloride.
A masked bromphenol blue indicator is added to the sample and turns green. Sodium tetraphenylboron is added to complex the QAC and the color changes to red. This method is best suited to higher QAC concentrations.
Designed for the testing and study of saline systems – oceans, bays, salt marshes, etc. This field-friendly outfit contains individual test modules for seven key salt water test factors, water sampling bottles, three supplemental handbooks now available as a download, and data sheets. The downloadable handbooks include A Laboratory Manual for Marine Science, Limnology, and Investigating Water Problems.
Anionic surfactants are extracted with toluene and break up an ion pair, releasing bromphenol blue into a water layer. Using the drop count method, a standard color reagent is then used to determine the concentration. Range and sensitivity is 1 drop = 1.0 ppm Detergent.
The Model SD Monitoring Kit was specifically designed and manufactured to meet US EPA requirements for field test procedures approved in the Federal Register (Volume 55, No. 217), to monitor illicit storm drain connections. Each unit includes tests for pH, Total Chlorine, Total Copper, Phenols, Detergent Surfactants, and Turbidity.
The Model SD is packaged in a rugged portable carrying case for on-site use. Includes diagrammed instructions.
This test kit measures for Chlorine Bleach using the Direct Reading Titrator method. Range/sensitivity is 00-10%/0.2% Cl.
This kit tests for nitrate and phosphate in water using the LRC Comparator. Range/sensitivity is 0.2, 0.4, 0.6, 1.0 ppm NO3–N; 0.2, 0.4, 0.6, 1.0 ppm PO43–.
The overall texture of a soil affects growth in the root zone, which determines the above-ground growth production, and is determined by the fractions of sand, silt, and clay present. Includes A Study of Soil Science handbook now available as a download.