Meaning of がくひ in Japanese

その金は私の学費に大いに役立つだろう。
The money will go a good way towards my school expenses.

それは化学肥料よりも安い。
It is cheaper than chemical fertilizers.

浅学非才の私ではありますが、何とぞ皆様のお力を賜りたく、ここにお願い申し上げる次第です。
I may not have much to offer in the way of learning or ability, but I want to do whatever I can for us all and humbly ask for your favor.