Depending on the region, crop rotation, soil, farm specifics, determine which irrigation application method and quantities are most advantageous to you and implement it following the instructions of your chosen specialist!
Soil moisture, also called "green water", is the component of the water cycle that is accessible to plant roots. Soil moisture decreases during periods of poor rainfall. Irrigation is the most widely used way to combat soil water scarcity and, consequently, the predominant use of water in agriculture. In Europe, agriculture accounts for about 32% of total water withdrawal, but reaches about 80% and more in Mediterranean countries. The role and impact of irrigation varies depending on the region and the prevailing climatic conditions: while in southern Europe irrigation is an essential ingredient of agricultural production, in central and northern Europe fields are irrigated sporadically and usually only during dry summer periods.
According to the latest IPCC report (AR6), soil water content in southern Europe will decrease; saturation and drainage conditions will be increasingly rare and limited to winter and spring periods. As a result, water demand for irrigation may increase substantially for the Mediterranean region. Irrigation will become necessary in other parts of Europe, while demand will decrease in parts of northern Europe, where precipitation is likely to increase. The energy sector (hydropower) will put additional pressure on water resources. With these developments, more robust water management policies are needed to manage the increasing competing demand between different sectors and uses.
Some ways in which irrigation efficiency can be improved are:

• Pressure irrigation (e.g. drip and sprinkler irrigation).
• Micro-irrigation or drip irrigation, reducing crop transpiration, evaporation and runoff.
• Deficit irrigation targeting maximum production per unit of water consumed — a thorough knowledge of crop behavior is required to apply.
• Climatic or precision irrigation is based on satellite hydrological monitoring and agricultural advice.
• For certain crops, intermittent/automated irrigation can be applied (Masseroni et al. 2018).
• Water reuse can counteract water scarcity and soil water depletion. If renewable energy sources (e.g. solar pumps) are used to power these innovative irrigation systems, water saving also combines with climate change mitigation.

Depending on the region, crop rotation, soil, and farm specifics, determine which irrigation method and quantities are most beneficial to you and implement them following the instructions of your chosen specialist!