Reap Mod

Reap is an amazing mod that will save you a ton of time while farming in Minecraft. In the vanilla game, you have to right click with a seed to plant it on a farmland block, then you have to right click with bone-mean to grow the crop, and once the crop reaches full growth, you need to left click to break it and obtain the crop alongside some seeds to farm again. Then you have to right click with the seed again in order to continue the process. This is where the Reap mod come in to help you.

With this mod installed, you can right click on a planted seed while holding bonemean in order to grow it. You can continue right clicking while holding bonemeal and crop will break itself once it reaches it's fully grown state. When the crop breaks, a seed is automatically planted in it's place, so that you dont have to scroll around your hotbar to switch between seeds and bonemeal. So basically you can hold righclick with bonemeal in your hand and the rest of the process will continue automatically wothout you needing to do anything.

This is a Forge mod and download links are given below. Read the installation instructions carefully.