Abstract: The invention is generally directed to a system and process for fluorometrically quantifying potentially mineralizable nitrogen for agricultural crop production. The soil analysis process measures potentially mineralizable nitrogen and calibrates the application of soil-based nitrogen for site or field specific management of nitrogen fertilizers for crops grown on a wide variety of soil textures including sandy loam, silt loam and clay soils. The spectrofluorometric system and process may be utilized for routine soil testing with a lower sample to sample variability, and the automation of the spectrofluorometric system and process allows for simultaneous determination of potentially mineralizable soil organic nitrogen, ammonium and nitrate.

Abstract: The invention is generally directed to a system and process for fluorometrically quantifying potentially mineralizable nitrogen for agricultural crop production. The soil analysis process measures potentially mineralizable nitrogen and calibrates the application of soil-based nitrogen for site or field specific management of nitrogen fertilizers for crops grown on a wide variety of soil textures including sandy loam, silt loam and clay soils. The spectrofluorometric system and process may be utilized for routine soil testing with a lower sample to sample variability, and the automation of the spectrofluorometric system and process allows for simultaneous determination of potentially mineralizable soil organic nitrogen, ammonium and nitrate.

Abstract: The present invention relates to an apparatus and method for receiving a modulating signal, splitting up its various frequency components into separate channels using a plurality of filters, and applying the outputs of the filters to gas discharge lamp modulating circuits to analogously vary the light output of each lamp. The present invention processes the modulation signal through a control circuit, a peak voltage detector, a current source, an ionization voltage supply, a filter circuit, a voltage multiplier and a modulating circuit to the gas discharge lamps. Optocoupling elements are implement in the present invention to control the circuitry. The gas discharge lamps have a rectifying element connected between each gas discharge lamp to prevent the gas discharge lamps from being connected to neutral by the filament of an adjacent gas discharge lamp.

Abstract: An emulsified pressure sensitive adhesive is provided which is based on a polymer containing from about 95 to 97.5% by weight of an alkyl ester of acrylic acid and from about 2.5 to 5% by weight of a mixture of carboxylic acids and a three component anionic surfactant system. The polymer is preferably tackified.