Farming villagers in the north spent their days harvesting crops like wheat and millet, while farmers south of the Huai River engaged in intensive rice cultivation and had lakes and ponds where ducks and fish could be raised. The cultivation of mulberry trees for silkworms and tea bushes could be found mostly south of the Yangzi River; even further south sugarcane and citrus were grown as basic crops. Some people in the mountainous southwest made a living by selling lumber from hard bamboo. Besides cutting down trees to sell wood, the poor also made a living by turning wood into charcoal, and by burning oyster shells to make lime and fired pots, and weaving mats and baskets. In the north traveling by horse and carriage was most common, while in the south the myriad of rivers, canals, and lakes provided cheap and easy water transport. Although the south had the characteristic of the wealthy landlord and tenant farmers, there were on average many more owner-cultivators north of the Huai River due to harsher climate, living not far above subsistence level.