SCIENCE AND INNOVATION INTERNATIONAL SCIENTIFIC JOURNAL VOLUME 2 ISSUE 3 MARCH 2023 UIF-2022: 8.2 | ISSN: 2181-3337 | SCIENTISTS.UZ 49
d - soil density, t / m
3
;
Rnv, Rf - humidity at the lowest moisture capacity and actual before irrigation,% of the
mass of dry soil.
When irrigating with water flow rates of 0.4-0.6 l / s with irrigation rates of gross 600-650
m
3
/ ha, when the norm below the calculated layer was 20-35 m
3
/ ha (3.3-5%) and water loss for
evaporation - 30-33 m3 / ha (5%), the calculated irrigation rate will be 550-581 m
3
/ ha. The use
of relatively lower irrigation rates of up to 600 m3 / ha and compliance with irrigation regimes
ensured an increase in yield by 3.4 c / ha, in contrast to the control plot [19].
Conclusion. According to forecasts, by 2040 the amount of waste can double. The question
of bringing phosphogypsum to such a state that it is possible to use it whole and it is cost-effective,
or to assimilate waste in the natural environment without compromising its natural state, is as
relevant as ever. Thus, the current problems of nature management and waste generation are
interrelated, which requires a phased and at the same time comprehensive solution.
It was found that the developed interpolymer materials with excess sodium carboxymethyl
cellulose salt can be used as highly swelling hydrogels and an anti-filter screen, and with excess
urea-formaldehyde resin and dispersed fillers to save irrigation water (uniform distribution of
water along the length of the irrigation furrow). The fact of their role in saving water and cotton
productivity is confirmed.
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