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2. Copper pesticide - Wikipedia

   en.wikipedia.org/wiki/Copper_pesticide

   The compounds permitted are copper sulfate, copper hydroxide, cuprous oxide, copper oxychloride, copper ammonium carbonate (at a maximum concentration of 25 g/L), and copper octanoate. According to the Soil Association the total copper that can be applied to organic land is 6 kg/ha/year. [16] This limit is designed so that the amount of copper ...

3. Benedict's reagent - Wikipedia

   en.wikipedia.org/wiki/Benedict's_reagent

   Benedict's reagent is a deep-blue aqueous solution. Each litre contains: [4] 17.3 g copper sulfate; 173 g sodium citrate; 100 g anhydrous sodium carbonate or, equivalently, 270 g sodium carbonate decahydrate

4. Copper–copper (II) sulfate electrode - Wikipedia

   en.wikipedia.org/wiki/Copper–copper(II)_sulfate...

   The copper–copper(II) sulfate electrode is a reference electrode of the first kind, [1] based on the redox reaction with participation of the metal and its salt, copper(II) sulfate. It is used for measuring electrode potential and is the most commonly used reference electrode for testing cathodic protection corrosion control systems. [ 2 ]

5. Proctor compaction test - Wikipedia

   en.wikipedia.org/wiki/Proctor_compaction_test

   The original Proctor test, ASTM D698 / AASHTO T99, uses a 4-inch-diameter (100 mm) by 4.584-inch-high (116.4 mm) mold which holds 1/30 cubic feet of soil, and calls for compaction of three separate lifts of soil using 25 blows by a 5.5 lb hammer falling 12 inches, for a compactive effort of 12,375 ft-lbf/ft 3.

6. Soil test - Wikipedia

   en.wikipedia.org/wiki/Soil_test

   A soil test is a laboratory or in-situ analysis to determine the chemical, physical or biological characteristics of a soil. Possibly the most widely conducted soil tests are those performed to estimate the plant-available concentrations of nutrients in order to provide fertilizer recommendations in agriculture.

7. Acid sulfate soil - Wikipedia

   en.wikipedia.org/wiki/Acid_sulfate_soil

   The term ‘acid sulfate soil’ is useful for general discussion, but fails to capture nuances required for technical classification of soils. Additional terms such as ‘potential acid sulfate soil’ (PASS), ‘active acid sulfate soil’ (AASS) and ‘post-active acid sulfate soil’ (PAASS) helped researchers distinguish between the following:

8. Cone penetration test - Wikipedia

   en.wikipedia.org/wiki/Cone_penetration_test

   The cone penetration or cone penetrometer test (CPT) is a method used to determine the geotechnical engineering properties of soils and delineating soil stratigraphy. It was initially developed in the 1950s at the Dutch Laboratory for Soil Mechanics in Delft to investigate soft soils. Based on this history it has also been called the "Dutch ...

9. Soil pH - Wikipedia

   en.wikipedia.org/wiki/Soil_pH

   The pH is measured in soil-water (1:1) and soil-salt (1:2 ) solutions. For convenience, the pH is initially measured in water and then measured in CaCl 2 {\displaystyle {\ce {CaCl2}}} . With the addition of an equal volume of 0.02 M CaCl 2 {\displaystyle {\ce {CaCl2}}} to the soil suspension that was prepared for the water pH, the final soil ...