A couple of Bible verses talking, in part, to 'growing fields' as we are in the midst of harvest in our area:

"Let the heavens be glad, the earth rejoice; let the vastness of the roaring seas demonstrate His glory. Praise Him for the growing fields, for they display His greatness. Let the trees of the forest rustle with praise. For the Lord is coming to judge the earth, He will judge the nations fairly and with truth!

~ Psalm 96:11 - 13 LAB

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And an installment from '31 Days of Prayer" from Focus on the Family:

A PRAYER FOR TUESDAY:

Day #19:  Pray for God's people to be a light.

"Heavenly Father,

I pray that Christians--myself included--will live out the principles of the Bible daily and be light in the darkness. Give me the courage and strength to stand up for Scriptural principles and morality. Allow opportunities for me and other to impact people in my own sphere of influence. I want to be your representative. Amen."