Irrigation and wheat growth: an observational study
In a sample of farms, rainfall (including irrigation from sprinklers) and crop yield are measured.
Use the pop-up menu to show the temperature in each field. In the observational study,
In the experiment,
In the observational study, rain gauges are installed in a sample of farms. Rainfall (which includes irrigation from sprinklers) and crop yield are subsequently measured.
In the experiment, moisture is controlled using supplementary irrigation. In each of 8 farms, 3 fields are used, with irrigation topping up moisture to 2, 2.5 and 3 mm of rainfall per day.