Kara-kum Desert

The failure in employing PAAm hydrogel (free swelling 1250 ml g 1) in the sandy soil of the Kara Kum desert is due to the same reasons [132] swelling in rainwater and in saline water from the Large Kara Kum canal used for irrigation purposes was equal to 680 and 255 mlg-1 in the free state and respectively 112 and 76 ml g 1 in the sand. This situation proved to be unacceptable for any SAH application. 

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