The fertility of chernozyoms in Achinsk forest-steppe

Achinsk forest-steppe is allocated in the basin of the river Chulym. The research objective was to find out the parameters of soil properties, determin-ing the productive capacity of chernozyom. The problem was to identify the effect of zoning laws on the level of soil fertility. The research was conduct-ed at Achinsk und Birilyuss seed-trial stations. Field and laboratory methods were used. The data on the yield of the stations in the area of 100 hectares were used. For a comparative assessment of soil fertility the materials from Dolgomostovskaya and Kanskaya stations of the Yenisei area of chernozyoms were brought. Granulometric compo-sition was soils-coarse-silty-silt light clay. In the be-ginning of the season the volumetric weight of the arable layer of the soil was 0.89 - 0.99. The total porosity was 58.0-64.9. Field capacity of arable layer of leached chernozyom was 62-69, podsolized chernozyom was 59-77 mm, meter lay-er was 319-341 and 332-345 mm. Humus content was from 9.3 to 10.2 %. Planting dates in the top-soil of the content of nitrite nitrogen was 15-20; ammonium was 14.1-24.9 mg/kg. The nitrification capacity of nitrate nitrogen was 6.4-9.7 mg/100g. Ammonium sulphate inereased to 17.8-24.5; clover meal increased to 12.9-15.2. The average yield of wheat (for 6 years) on leached chernozyom was 18.6-19.1, podsolized chernozyom was 19.6-19.9 kg/hectare; grain cult was respectively for 22.2 and 23.6 and 20.4 to 22.8. During the rotation of crop in arable layer of soil 600.6-631.4 comes of root mass. When high-quality agrotechnologies were used on the fallow suffient of nitrate nitrogen was accumulated. The contents in chernozyom of Achinsk forest-steppe of humus, nitrate nitrogen, phosphate, and exchange potassium provides av-erage yield of crops 22.8-23.6 C/hectare. The technology of tillage in fallow field is in the condi-tions the accumulation of sufficient quantities of ni-trate nitrogen. When the content in the soil of 9.5-14.0 mg phosphate per 100 g of soil (according to Chirikov) wheat does not respond to phosphorus fertilizers. The need for potash fertilizers is not re-vealed. The level of fertility of leached and podzolized chernozyoms in Achinsk forest-steppe is equivalent. They are identical with the chernozyoms of Kansk forest steppe.