Land management
First, check moisture levels at 6 inches under soil using moisture metre as soil requires atleast 60% and 80% most of moisture hence water for specific duration and check moisture levels. Increase water duration when soil moisture is below 50% after 1 day of watering and water frequently when weather is hot and less when it is cool.
Similarly, only water crops from below and not from top to prevent fungal diseases to the plants and also water according to type of plants your growing in garden as plant have different water needs.