Kural - 1037

Reduce your soil to that dry state, When ounce is quarter-ounce's weight;
Without one handful of manure, Abundant crops you thus secure

Explanation
If the land is dried so as to reduce one ounce of earth to a quarter, it will grow plentifully even without a handful of manure.

Tamil Transliteration
Thotippuzhudhi Kaqsaa Unakkin Pitiththeruvum
Ventaadhu Saalap Patum.