Approximate dependences of experimental data are power functions (Table 2).
The reliability of the approximation of experimental data was determined according to
the generally accepted methodology using the correlation index R
2
, which in all cases
was not less than 0.98, which indicates the adequacy of the obtained dependences [7].
Table 2 Empirical dependences of the parameters of the model of moisture transfer
Parameters
Ground profile horizon, m
0,10 – 0,30
0,30 – 0,50
0,50 – 0,70
()
θ
ψ
10
25
+25θ
-16,141
10
28
+28θ
-17,927
10
36
+36θ
-22,037
2
R
0,9912
0,99
0,9935
()
Ψ
K
1,9001
Ψ
-4,8266
19,871
Ψ
-2,2695
11,786
Ψ
-2,2153
2
R
0,9864
0,9807
0,9817
On the experimental site, fodder beets were grown. The estimated period is 10
days (beginning of July), with the capacity of the root system hk = 0,5 m, evaporation
of 8 mm/day, irrigation (at a rate of 500 m
3
/ha) during the 7th day [8]. Calculations for
a multi-layer model of moisture transfer determine the predicted distribution of
moisture by vertical for different periods of time (up to 15 days) (Fig. 7).
Figure 7. Forecast and actual distribution of volumetric soil moisture for 10 days
under fodder beets in the farm with. Kiselyovka of the Belozersky district of the
Kherson region (PP – Pre-fill threshold of soil moisture, NV – the lowest moisture
content of the soil)
P
P
N
V
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