subject to the same trading constraints as senators. Citizen men and citizen women were expected to marry, produce as many children as possible, and improve – or at worst, conserve – their family's wealth, fortune, and public profile. Marriage offered opportunities for political alliance and social advancement. Patricians usually married in a form known as confarreatio, which transferred the bride from her father's absolute control or "hand" (manus) to that of her husband. Patrician status could only be inherited through birth; an early law, introduced by the reactionary Decemviri but rescinded in 445, sought to prevent marriages between patricians and plebeians; any resulting offspring may not have been legally recognised. Among ordinary plebeians, different marriage forms offered married women considerable more freedom than their patrician counterparts, until manus marriage was replaced by free marriage, in which the wife remained under the legal authority of her absent father, not her husband. Infant mortality was high. Towards the end of the Republic, the birthrate began to fall among the elite. Some wealthy, childless citizens resorted to adoption to provide male heirs for their estates, and to forge political alliances. Adoption was subject to the senate's approval; the notoriously unconventional patrician politician Publius Clodius Pulcher had himself and his family adopted into a plebeian clan, so that he could hold a plebeian tribunate. Trade and economy Farming The Republic was created during a time of warfare, economic recession, food shortages, and plebeian debt. In wartime, plebeian farmers were liable to conscription. In peacetime, most depended on whatever cereal crops they could produce on small farming plots, allotted to them by the state, or by patrons. Soil fertility varied from place to place, and natural water sources were unevenly distributed throughout the landscape. In good years, a pleb small-holder might trade a small surplus, to meet his family's needs, or to buy the armatures required for his military service. In other years, crop failure through soil exhaustion, adverse weather, disease or military incursions could lead to poverty, unsupported borrowing, and debt. Nobles invested much of their wealth in ever-larger, more efficient farming units, exploiting a range of soil conditions through mixed farming techniques. As farming was labour-intensive, and military conscription reduced the pool of available manpower, over time the wealthy became ever more reliant upon the increasingly plentiful slave-labour provided by successful military campaigns. Large, well managed agricultural estates helped provide for clients and