Microfertilizers

In addition to the main nutrients in the composition of fertilizers are small amounts of boron, copper, molybdenum, zinc other trace elements. Fertilizers in which they are the main acting nutrients, are called microfertilizers. They are released in the form of powders, granules, tablets, are included in mixed fertilizers, they are introduced as foliar dressings and used for presowing seed treatment. Microfertilizers contain microelements, the need for

plants in which increases with increasing doses of organic and mineral fertilizers. Thus, the introduction of a large amount of phosphorus fertilizers increases the need for zinc, potassium in boron, nitric in copper and manganese, and liming of soils in boric and manganese fertilizers. To fill them in the soil use different types of microfertilizers. Boron fertilizers include boron superphosphate( 20% phosphorus and 0.2% boron), boromagnesium fertilizer( 2.25 % boron and 14% magnesium oxide) and boric acid( 17.1-17.3% boron).Boron superphosphate is applied in the spring for pre-sowing plowing at 0.3-0.35 kg per 10 m2, and boric acid( 0.02-0.04% solution) is used for foliar top dressing of plants and presowing seed treatment.

Copper fertilizer. As these fertilizers use pyrite cinder, containing about 0.2-0.3% copper. On peat-bog soils they are brought in autumn or spring for 15-20 days before sowing 0.4-0.5 kg per 10 m2( 4-6 years).For preseeding treatment of seeds and foliar dressings, 0,02-0,05% - a solution of copper sulphate is used. Molybdenum fertilizers have a positive effect on podzolic and peat-bog soils. Increase the yield, increase the content of proteins, chlorophyll, ascorbic acid and vitamins. As these fertilizers, molybdenum superphosphate containing 0.1-0.2% molybdenum is used. Make as the main fertilizer or in rows. Manganese fertilizers play an important role in oxidation-reduction processes, in plant respiration and photosynthesis. As these fertilizers use manganese slime( from 9-15% manganese) and manganese superphosphate( 2-3%) - for the main and row application. For foliar dressing and seed treatment, manganese sulfate( 21-22% manganese) is used, 0.01-0.05% solution is taken. Zinc fertilizer is necessary for oxidation-reduction processes. These fertilizers are sulfuric acid zinc( 25% zinc).Applied for foliar top dressing of plants( 0,01-0,02% - solution) and presowing seed treatment( 0,05-0,1% - solution).

In the absence of microfertilizers for the treatment of seeds, wood ash can be used, which contains more than 30 trace elements. In 1 liter of warm water, dissolve 2 tbsp.l.wood ash and insist for a day, stirring occasionally. Then the solution is filtered, And seeds are immersed in it in a gauze pouch. Seeds of carrots and onions stand 6, and the rest of the vegetable crops -Zh,.