Reproduction of energy plants of short rotation is perfect in less favourable farming areas. Planting of such plantations is subsidized by the state through the use of funds specifically allocated for such needs by the European Union. Planting of short rotation plants is supported by compensating the part of the costs incurred.
Longevity of plantations depends on many factors: soil and climatic conditions, level of cultivation techniques, species of grown osier willow or its clone. As a result, the lifetime of plantations, even their separate plots, can be irregular.
The growth of osier willows in the third and fourth years is most intense. At the end of the third year summer the osier willows reach 3-5 m in height in well-fostered plantation, and in the fourth – up to 5-7 m. Second and next harvests tend to be higher than the first, and the interval between the harvesting is reduced to 3 years. Osier willow plantations are harvested in the winter (from November to April), using modified harvesters or special equipment. Harvesters crush stems into chips at once and strew them into the trailers pulled nearby.
Made chip can immediately be transported to the district boiler-houses for combustion. 1 ton of calorific value of green mass of osier willow chips is about 8.9 GJ/t. For comparison, straw and dry grass - 11-15 GJ/t, peat - 10.8 GJ/t.