Soil type and climate both influence the cotton plants response to soil moisture status. Soil types differ in both the amount of moisture contained and more importantly how this moisture is available to the plant. Climate, through evaporative demand, influences plants requirement for water, mainly through changing evapotranspiration rates. The combination of these two factors has a large effect on the level of plant moisture stress and consequently irrigation scheduling for cotton. Our research investigates the effect of these factors on the cotton plant in the Australian cotton industry and our aim is to refine irrigation scheduling guidelines and promote increased water use efficiency