Mineral fertilizers
Organic agriculture
Bluestone
The bluestone (copper sulphate) is one of the most frequently used copper-containing fungicides, which have fungicidical and bactericidal action and protective functions. Unlike other copper fungicides, copper sulphate is well water-soluble.
In agriculture is mainly used in the form of 1 or 2% bordolese solution.
Technical characteristics of the blue stone (copper sulphate)
- Copper sulphate % - min. 99.1
- Copper % - min 25.0
- Arsenic % - Max. 0.002
- Free sulfuric acid % - Max. 0.20
- Insoluble residue % - Max. 0.05
Indicative standards for fertilization
The bordolese solution is prepared by mixing 100 liter of water is with 1 or 2 kg. bluestone and approximately the double quantity of raw lime.
The bluestone is used for winter spraying of plantations (2%), post flowering spraying (1%), in viticulture for combating the couses of mildew (from 1% to 3%), by other plants against bacterial and fungal diseases and as a mean for decontamination of seeds
Briefly the role of individual elements:
Nitrogen - an element of growth, a key to the formation of vegetative organs. | |
Phosphorus - participates in vital processes - formation of cell nuclei, cell division, synthesis of fats, transmission of energy. Contributes to the formation of generative organs - color, seed. Stimulates the root formation, very important for the sustainability of crop. | |
Potassium - participates in all vital processes, regulates activities of a large number of enzymes. Plants which are well provided with potassium are resistant to drought, have thicker cell walls and suffer less from diseases and enemies. | |
Magnesium - activates certain enzymes involved in synthesis of proteins and transformation of phosphorus compounds, etc. | |
Calcium - necessary for growth, cell division and photosynthesis, regulates physical state of cell colloids, maintains the optimum tissue buffering. | |
Sulfur - an integral part of the amino acids methionine and cystine, which build proteins; an extremely important element for the crops with fatty metabolism. | |
Bor - an important role in fertilization and fructification. Raises fat content of sunflower | |
Zinc - activates a range of enzymes, stimulates synthesis of proteins and carbohydrates. | |
Iron - an important constituent of chlorophyll. | |
Manganese - activates enzymes, which participate in the formation of chlorophyll, the transmission of energy, in photosynthesis and the formation of proteins. |