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2. Tree stump - Wikipedia

   en.wikipedia.org/wiki/Tree_stump

   A common method for stump removal is to use one of the many chemical stump removal products, so long as immediate results are not needed. These stump removers are mostly made of potassium nitrate (KNO 3) and act by rapidly increasing the decay of the stump. (The chemical provides nitrogen, a limiting nutrient, to tree-decaying fungi.

3. Sodium metabisulfite - Wikipedia

   en.wikipedia.org/wiki/Sodium_metabisulfite

   In combination with sodium hydrosulfite it is used as a rust-stain remover [9] It is used in photography. [10] Concentrated sodium metabisulfite can be used to remove tree stumps. Some brands contain 98% sodium metabisulfite, and cause degradation of lignin in the stumps, facilitating removal. [11]

4. Ammonium sulfamate - Wikipedia

   en.wikipedia.org/wiki/Ammonium_sulfamate

   Ammonium sulfamate is considered to be particularly useful in controlling tough woody weeds, tree stumps and brambles.. Ammonium sulfamate has been successfully used in several major UK projects by organisations like the British Trust for Conservation Volunteers, English Heritage, the National Trust, and various railway, canal and waterways authorities.

5. Potassium nitrate - Wikipedia

   en.wikipedia.org/wiki/Potassium_nitrate

   Component (usually about 98%) of some tree stump removal products. It accelerates the natural decomposition of the stump by supplying nitrogen for the fungi attacking the wood of the stump. [58] In heat treatment of metals as a medium temperature molten salt bath, usually in combination with sodium nitrite. A similar bath is used to produce a ...

6. Rocket candy - Wikipedia

   en.wikipedia.org/wiki/Rocket_candy

   Potassium nitrate is most commonly found in tree stump remover. Additives can be many different substances, and either act as catalysts or enhance the aesthetics of the liftoff or flight. A traditional sugar propellant formulation is typically prepared in a 65:35 (13:7) oxidizer to fuel ratio. [1]

7. Heterobasidion annosum - Wikipedia

   en.wikipedia.org/wiki/Heterobasidion_annosum

   Chemical methods include prophylactic stump treatment with a solution of urea immediately after the infection. This protects the stump by hydrolysis of the compound by the enzyme urease in the living wood tissue, which results in formation of ammonia and a rise in pH to a level that H. annosum at which mycelia are unable to survive. Biological ...