It has also been used as a term for a hangover, with the sufferer's groans of discomfort being humorously likened to a wailing cat. It may refer to: 1  Worbey & Farrell, previously known as Katzenjammer, a British piano musical comedy duo.  Katzenjammer (band), a Norwegian pop/folk band.
Zinc (Zn) is one of the eight essential micronutrients. It is needed by plants in small amounts, but yet crucial to plant development. In plants, zinc is a key constituent of many enzymes and proteins. It plays an important role in a wide range of processes, such as growth hormone production and internode elongation.
The function of manganese in the plant is closely associated with the function of iron, copper and zinc as enzyme catalysts. Manganese is needed for photosynthesis, respiration, nitrate assimilation and the production of the plant hormone auxin.