Step 1: When you are on the record entry page for your field, click on the Add another record button under the year of the event you need to add.
Step 2: Select the desired event type from the option list and click Next, Enter Details.
Step 3: Fill out the required information that applies to that specific chemical application or whichever event type you chose.
Always be sure to click Save or Save & Resume Later after any addition or modification to an event.