The amount of absorbed Са
2+
in the soils of this group is 6.3 mg-eq, Mg
2+
2.5 mg-
eq per 100 g soil, which indicates their low saturation bases. Due to the low content of
humus, these soils are poor in nitrogen (68 mg/kg of soil), and the acidic reaction
suppresses the processes of nitrification. Therefore, the accumulation of mobile
nitrogen compounds goes slow. The content of mobile phosphorus compounds is 79
mg/kg and potassium is 97 mg/kg of soil (Table 1).
The research were been held in the stationary polygon of the Department of
Agrochemistry and Soil Science, established in 2011 on accordance with the generally
accepted methodology. The soil cover of experimental field represented by sod-
podzolic surface-gleyed soil. Repetition - three times, accounting square of the
experimental plot - 25 m
2
. Have sown forward-looking and zoning adopted varieties
of cereal grasses: Phleum pratense L - Carpathian, Lolium perenne - Kolomyiska,
Dactylis glomerata - Stanislavska, Festuca rubra L. - Goverla, Phalaris arundinacea -
Smerichka, Festuca orientalis – Menchulska, Bromus inermis - Kozarovytskyi.
Table 1 Physico-chemical rates of sod-podzolic surface-gleyed soil of the
experimental field before the experiment (2011)
Genetic horizons
Humus, %
Alkaline hydrolyzed
nitrogen
Mobile
phosphorus
Exchangeable
potassium
mg-kg soil
Hegl (0-20)
2,3
68,2
79,0
97,1
Egl (20-35)
1,3
52,1
37,3
85,4
IEgl (35-50)
0,9
24,3
26,4
80,2
I (50-100)
0,5
21,2
19,2
128,0
In experiment we studied the interaction of two factors: A - types of herbs; B -
soil tillage: the usual plowing on the depth of the humus horizon is 20-22 cm, small
plowing at depth of 14-16 cm, and a surface cultivation (disking on depth of 8-10 cm)
(Table 2).
Table 2 Scheme of experiment
Factor A - types of herbs
Factor B - soil cultivation
1. Phleum pratense L.
2. Lolium perenne L.
3. Festuca orientalis
4. Bromus inermis
5. Dactylis glomerata
6. Festuca rubra L.
7. Phalaris arundinacea
Usual plowing on 20-22 cm (control).
Small plowing on 14-16 cm.
Surface tillage (disking) on 8-10 cm.
The experiment was conducted on the background of the introduction of
N
90
Р
60
К
60
, where were used: ammonium nitrate (34% of nitrogen), K-magnesia
(Potassium Magnesium Sulfate) (29% of potassium), superphosphate (19% of
phosphorus).
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