Medieval agriculture. Border illustration from the 14th-century Luttrell Psalter showing men on a farm harrowing a field and scaring off birds. Harrowing breaks up surface soil, as opposed to the deeper process of ploughing. The man at left has a sling and stones, with a slung stone between two crows. The Luttrell Psalter is an illuminated manuscript that was produced in East Anglia, England, and dates from around the period 1325-1335. The text is in Latin, while the marginal illustrations show saints, Bible stories and everyday rural life.