if we harvesting grain would that be adequate to maintain the harvest we need?

Lev: 18:21,26

To the Levites I have given every tithe in Israel for an inheritance, in return for their service that they do, their service in the tent of meeting

Moreover, you shall speak and say to the Levites, ‘When you take from the people of Israel the tithe that I have given you from them for your inheritance, then you shall present a contribution from it to the Lord, a tithe of the tithe.

As Christian business professionals  Levite being one who helps the priest, and if Christ is our high priest, and our pastors and leaders are the ones who assist Christ is delivering the Word, But Look at verse 26 even the church has to pay a tithes unto the Lord, so why we so hung up on giving tithes and offering


Give unto ceaser what is do caesar and unto God what is due God, even though Jesus Fulfilled the Law, we are still to be cheerful givers, a standard was set why decrease the standard, are we really strugglin that much giving ten%, that we wont to abolished this

if we harvesting grain would that be adequate  to maintain the harvest we need?