How to manage a citrus tree nursery<br>Familiarize yourself with the citrus plants and trees being grown. [substeps] Though citrus trees may seem to have a lot of common, significant differences between breeds and varieties do exist. Learn how much water, sunlight, and fertilizer is required to support the citrus trees under your care.

Based on that paragraph can we conclude that this sentence is true?
learn how much sunlight is required

Choose from: 1). Yes; 2). It's impossible to say; 3). No;