Sentence:  As a substitute for this , organic fertilizer dissolved in <WSD>water</WSD> to half the strength in the directions , may be used . 
Meaning of the word marked with <WSD> tags:  binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent