What are the identification methods of potash fertilizer?
What are the identification methods of potash fertilizer? How to distinguish the true and false potash fertilizer method: the first is the iron sheet combustion method: put a little fertilizer particles (large or small) on the red-hot iron sheet to burn, and those who do not melt, odorless or heated can be roughly defined as potash fertilizer. If the iron sheet is tilted and the fat particles are directly burned by high temperature, there will be a colored flame, the golden shining flame is sodium, and the light yellow with lavender flame is potassium. Potash fertilizer also has a kind of powder, the color can be brick red, light red or white, its identification method is also burning on the iron sheet, potash fertilizer is non-melting, no odor, while phosphate fertilizer is light gray, although it is not melted, but it has a smell. Add: if the fertilizer particles on the iron sheet are melted by high temperature and there is thick smoke, those with ammonia odor are ammonium nitrogen fertilizer, and those without ammonia smell may be nitrate; if the fertilizer particles on the iron sheet do not melt and do not beat, and those who smell sour or bone smell, it may be phosphate fertilizer. The second is to dip the saturated potash solution on the wire ring and burn on the high temperature flame to observe the flame color, but it is difficult to distinguish the flame color between potassium and sodium. However, if inferior potash fertilizers other than conventional ones are encountered in the market, such as the small blocks or powdered forms of unrefined potash feldspar, the content of soluble potassium can only be determined by means of laboratory tests. Only rely on the combustion method can only be qualitative, not quantitative, that is to say, can only distinguish between true and false, can not be superior or inferior. So when farmers choose to buy chemical fertilizer, they should go to the regular sales outlets to avoid being deceived. Click to get more nitrogen, phosphorus, potassium application techniques click to get more fertilizer application techniques
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What about the drug damage caused by the application of herbicides to rice?
What if herbicides are applied to rice to cause drug damage? In order to increase the efficacy of herbicide and expand the herbicide spectrum, most compound herbicides contain benzenesulfuron-methyl, pyrimidinosulfuron-methyl, Acetochlor, etc., if farmers do not know how to use, it is easy to cause drug damage. First, the judgment of drug damage to rice due to retting roots, element deficiency or diseases and insect pests.
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How to apply flushing fertilizer to grow vegetables in greenhouse?
How to apply flushing fertilizer to grow vegetables in greenhouse? In seeking technical guidance for greenhouse vegetable production, many farmers apply fertilizer too frequently, which often causes soil consolidation, rotten roots, retting roots, plant wilting and other phenomena, which seriously affect the economic benefits of farmers. To this end, it is suggested that in the production of greenhouse vegetables, fertilization should achieve "four combinations".
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