User manual HANNA INSTRUMENTS HI 3895

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[. . . ] Phosphorus contributes to the formation of buds, roots and blooming as well as lignification. A lack of phosphorus results in a stifling of plant. Potassium plays an important role in how much water is absorbed by the roots and the regulation of cellular activity. In addition, Potassium makes plants more resistant to disease and yields a positive effect on the color and fragrance in flowers. [. . . ] The clearer the extract becomes, the better the results, however, a little cloudiness will not affect the accuracy of the test. Use the pipette to transfer 2. 5 ml of the clear general soil extract (above) to a clean test tube [*]. Add the content of one packet of HI 3895-N reagent to the tube, replace the cap and shake well for 30 seconds to dissolve the reagent. Allow the tube to stand for 30 seconds, match the pink color with the Nitrate color-card. Use the pipette to transfer 2. 5 ml of the clear general soil extract (see above) to a clean test tube [*]. Add the contents of one packet of HI 3895-P reagent to the tube, replace the cap and shake well for 30 seconds to dissolve the reagent. Match the blue color against the Phosphorus color-card for the P concentration. Use the pipette to add 0. 5 ml of the clear general soil extract (above) to a clean test tube [*]. Fill the tube to the lower graduation mark (2. 5 ml) with water. Add the content of one packet of HI 3895-K Reagent to the tube, replace the cap and shake well for 30 seconds to dissolve the reagent. Match the test tube against the Potassium reading-card. To avoid agitation of the soil, squeeze the bulb of the pipette before inserting the pipette into the soil extract solution. HEALTH & SAFETY The chemicals contained in this test kit may be hazardous if improperly handled. Read carefully Health & Safety Data Sheets before performing the tests. Health and safety data sheets are available on line: www. hannainst. com CONTENTS Each kit is supplied with: · 40 powder packets (10 each for pH, N, P and K); · 1 plastic pipette (1 ml); · 4 test tubes; · 4 Color Cards; · 1 Graduated Card. 05/04 www. hannainst. com HI 3895 Quick Soiltest HANNA Quick Soiltest para conseguir plantas lozanas: El test de suelos rápido, de HANNA, proporciona al usuario una manera económica de comprobar rápidamente el pH así como los tres elementos básicos necesarios para una planta más sana: nitrógeno (N), fósforo (P) y potasio (K) pH. El suelo puede ser ácido, neutro o alcalino. Cada planta tiene un rango de pH en el que crece muy bien y la mayor parte de las plantas prefieren condiciones próximas a la marca neutra (pH 5, 5-7, 5). No obstante, existen plantas que prefieren entornos ácidos o alcalinos. La solubilidad de los nutrientes, esto es, la capacidad de las plantas de absorberlos, depende sobremanera de su pH. La actividad microbiológica del suelo también depende del pH. La mayoría de las bacterias, especialmente las que ponen nutrientes a disposición de las plantas, prefieren condiciones moderadamente ácidas o ligeramente alcalinas. Por lo tanto, el nivel de pH influye en la fertilidad del suelo. [. . . ] Compare el color azul con la tarjeta P de colores de Fósforo para obtener la concentración de P. Con la pipeta, eche 0, 5 ml del extracto de tierra general claro (mencionado anteriormente) en un tubo de ensayo limpio [*]. Llene el tubo con agua hasta la marca de graduación inferior (2, 5 ml). Agregue el contenido de un paquete de reactivo HI 3895-K, vuelva a tapar y agite bien durante 30 segundos para disolver el reactivo. [. . . ]

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