And in the earth are neighbouring tracts, and gardens of vines, and green crops (fields etc.), and date-palms, growing out two or three from a single stem root, or otherwise (one stem root for every palm), watered with the same water, yet some of them We make more excellent than others to eat. Verily, in these things, there are Ayat (proofs, evidences, lessons, signs) for the people who understand.