Suitable For Crops Grown In The Central Highlands :Most recently, research by agrochemical and soil scientists has specifically analyzed that soil in the Central Highlands has characteristics such as high porosity and good structure, so it easily absorbs water, accumulates clay, and has little conglomeration. , poor in base due to leaching of CaO, MgO, SiO2, S and trace elements, so the reaction is sour – very acidic (pH: 3.9 – 5.2).
Through these results, it can be seen that crops grown in the Central Highlands are mainly suitable for the following specific pH levels:
Rice is suitable for a pH of 4.5 – 5.5, corn is suitable for pH 5 – 6, coffee is suitable for pH 4.5 – 6.5, rubber is suitable for pH 4.5 – 5.5, Pepper is suitable for pH 5.5 – 6.5, cassava is suitable for pH 6.0 – 7.0, avocado tree is suitable for pH 5.0 – 6.0…
Studies on inorganic fertilizers show that coffee is a high-yield plant, able to achieve an average yield of 3 tons of beans/hectare, and can even yield up to 5 tons in intensive gardens. soup. For robusta coffee trees, nutrients will be removed with the fruit with an average of 34.2 kg N + 6.1 kg P2O5 + 46.9 kg K2O + 4.1 kg MgO + 4.3 kg CaO .
In addition, coffee plants also remove some indispensable trace elements from the soil such as Copper (Cu), Zinc (Zn), Boron (B), Manganese (Mn), Molipdenum (Mo), Iron (Fe). , Chlorine (Cl)… If these substances are deficient, the plant’s productivity will be significantly reduced.
For rubber trees, to produce 3 tons of latex ha/year, the tree absorbs 18.9 kg of N, 3.8 kg of P2O5, and 12.9 kg of K2O. However, when using stimulants, the yield is similar to 3 tons of latex, but the amount of nutrients the tree takes according to latex yield is 18.9 kg N, 8.7 kg P2O5, 15.5 kg K2O. Therefore, the total fixed D2 over a 30-year period is 1,500 – 1,800 kg N/ha, 458 – 573 kg P2O5, 1,440 – 1,680 kg K2O and 300 – 365 kg MgO/ha.
The amount of D2 removed from latex annually specifically studied from year 6 to year 30 is 6.1 – 35.7 kg N/ha, 2.4 – 17.6 kg P2O5, 6.0 – 39.1 kg K2O and 1.4 – 9.3 kg MgO/ha.
Cocoa trees are suitable for many different types of soil, including red soil, gray soil, and ancient alluvial soil. But it is most suitable for soils with medium to light mechanical composition, pH from 5.5 – 6.0, arable layer 1 – 1.5 m thick, easy to drain, high water holding capacity, has rich in organic matter. Cocoa is a plant that absorbs many nutrients, of which the most absorbed is potassium.
Other research on pepper trees shows that, with a yield of about 2 tons/ha, the tree removes 70 kg of N and 26 kg of P2O5 from the soil; 42 kg K2O; 18 kg MgO; 67 kg of CaO and other nutrients such as Fe, Mn, S, Zn, B. Most soil in the Central Highlands is usually acidic, with a low pH of 3.8 – 4.2 and poor in calcium and sulfur. sulfur, boron and other trace elements. According to research results, pepper plants can grow on soil with a pH of 4.5 – 7, optimally 5.5 – 6.5…
Van Dien fertilizer is a natural mineral, not chemical fertilizer, very suitable for cultivating clean agricultural products such as GlobleGAP, VietGAP, and organic agricultural products. This type of Van Dien fertilizer does not dissolve in water, does not wash away, is not fixed by metals in the soil, does not pollute the environment, and has a high efficiency of 95 – 98%.
In fact, Van Dien Fused Phosphate Joint Stock Company has combined with agricultural scientists to produce over 60 types of NPK multi-element fertilizer products: these are specialized fertilizers for each different type of plant, suitable for each type of plant. Suitable for each type of soil and suitable for each stage of development of many types of crops including: Specialized fertilizer for rice, specialized fertilizer for potatoes, specialized fertilizer for peanuts (3 types), mulberry (4 types) types), for tea trees (13 types for tea varieties on different soils), for coffee trees and fruit trees (3 types, with different types of basic and top-dressing fertilizers).
More specifically, the NPK multi-element fertilizer product specialized for coffee plants includes 2 types: N-P2O5-K2O-CaO-MgO-SiO2-S = 10-5-12-7-7-6-3 and N -P2O5-K2O-CaO-MgO-SiO2-S = 10-8-12-15-8-13-3. Contains a full range of secondary, macronutrients and micronutrients Fe, Cu, Zn, Mn, Mo, B… with a total composition of up to 60 – 75% that can be used to take good care of coffee gardens.
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