I dont understand the balance sheet. How could total equity...

I dont understand the balance sheet. How could total equity increased 4+ fold?
In 2014, total equity was: $108.443m.
In 2015, total equity is: $501.091m.

Most of the equity comes from Property, plant and equipment and water right.
I know WBA bought land and water right from Kooba, Bengerang and Tandou with cash and shares.

But I don't understand how could the acquisition increase the total equity so much?
Sorry, I don't know much about accounting, can someone explain please?