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Abstract

The main purpose of this study is to determine the optimum water consumption for achieving water savings and obtaining good yields in cotton production, which has been expanding in Central Asia and Turkmenistan since the 1960s. In the last few decades, water resources in the region have been difficult to access, due to the expansion of agricultural activity and population growth. The oscillation of the amount of water released from dams of the Amudarya River to obtain energy for the upper countries in the winter season has been causing crises in countries of Central Asia.
An experiment was carried out in an agricultural field at a cotton research centre in the Yolöten district of Turkmenistan. The experiment led to the observation that it is possible to achieve higher efficiency and lower water consumption in cotton production. At the same time, the water savings that can be achieved as a result of using the drip irrigation method in cotton production throughout the country have been calculated. The calculations have provided the basis for recommending irrigation as a solution to the problems in question.
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Bibliography

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Authors and Affiliations

Begmyrat Kulmedov
1
ORCID: ORCID
Vladimir I. Shcherbakov
2
ORCID: ORCID

  1. Nile University of Nigeria, Department of Civil Engineering, Plot 681, Cadastral Zone C-OO, Research & Institution Area, Jabi Airport Bypass, Abuja FCT, 900001, Nigeria
  2. Voronezh State Technical University, Department of Hydraulics, Water Supply and Water Disposal, Voronezh, Russia
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Abstract

In this paper, the deviation from eutectic composition in boundary layer for eutectic growth is studied by phase-field method. According to a series of artificial phase diagram, the lamellar eutectic growth of these alloy is simulated during directional solidification. At steady state, average growth velocity of eutectic lamella is equal to the pulling velocity. With the increasing of the liquidus slope of β phase, the average composition in boundary layer would deviate from eutectic composition and the deviation increases. The constitutional undercooling difference between both solid phases caused by the deviation increases with the increasing of the deviation. The β phase would develop a depression under the influence of the deviation.

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Authors and Affiliations

Zhixin Tu
Jianxin Zhou
Yajun Yin
Xiaoyuan Ji
Xu Shen

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