请以发表学术期刊的要求优化这段文字使其逻辑清晰、学术、简洁：Insufficient irrigation water supply will not be an exception and irrigation management will shift from emphasizing unit area yield to maximizing unit water consumption i

Insufficient irrigation water supply necessitates a shift in irrigation management towards maximizing unit water consumption, as opposed to emphasizing unit area yield. This is achieved through water productivity, wherein deficit irrigation serves as an important tool to reduce water usage. Deficit irrigation refers to applying water below the crop's full water requirement. Despite its widespread use on millions of hectares of land due to inadequate network design or irrigation over-expansion, research attention towards deficit irrigation has been lacking