摘要 : A field attempt with early potatoes variety Nadezda was carried on Strongly Leached Meadowcinnamon Soil, in the Maritsa Vegetable Crops Research Institute, Plovdiv. It was tested the following rates: 0,80, 160 and 240 kg N/ha that... 展开 A field attempt with early potatoes variety Nadezda was carried on Strongly Leached Meadowcinnamon Soil, in the Maritsa Vegetable Crops Research Institute, Plovdiv. It was tested the following rates: 0,80, 160 and 240 kg N/ha that are input separately and rates on phosphorus background: 0,80,160 and 240 kg P2O5/ha and also selected variants for potassium: 0,80, and 160 kg K2O/ha. As a result of the experiment was established that for the formation of a unit potato produce it is necessary: nitrogen - from 3.07 kg to 8.52 kg；phosphorus - from 1.72 kg to 2.97 kg and potassium - from 5.91 kg to 10.85 kg. The correlation between yield and absorbed amount of nutrients being necessary for obtaining of the vield was established by regression equations. 收起