This also helps to destroy weeds. Weeding is done by cultivating with a suitable tool, such as a hoe or for, and also by hand pulling of the weeds. Only scratch the surface about one to two inches, if you'll wait till the sun dries out the weeds it would be best before they can take root again. Now those weeds that are growing right by the crops or the flowers must be pulled by hand. If you don't get the weeds pulled when they first begin to grow or soon thereafter they will make roots and be harder to pull.
Sufficient moisture needs to be in the soil at all times in order to keep the plants growing.
If you have prolonged periods of drought you'll need to water, just depends on your area. Remember that sandy soils will dry out more quickly than the clay ones. Sprinkling light will just lightly lay the dust layer and do more harm than good, this encourages small feeding roots to grow near the surface trying to get moisture. You need to soak the soil to permit the water to penetrate deeply and evenly into the ground. If you will water in the cooler part of the day you'll lose less water to evaporation as in the hotest part of the day.