The Toba and Karo Batak live in permanent villages and cultivate irrigated rice and vegetables. On the other hand, the Angkola, the Mandailing, and the Pakpak practiced slash-and-burn agriculture which required frequent changes of location and their villages were only semi-permanent.[1]
Karo Batak village
Irrigated rice cultivation can support a large population, and the Toba and the Karo live in densely clustered villages, which are limited to around ten homes to save farming land. Unirrigated slash-and-burn agriculture supported smaller villages with only several houses. All villages are located near watercourses and fields. Internecine Batak warfare before the twentieth century saw villages sited in easily defensible positions. High bamboo stockades fortified Pakpak villages and barriers of earthen ramparts with bamboo fencing and trees.[1]
Each Batak group has its own rules and traditions guiding village layout. Toba Batak houses are laid out side by side with their front gables facing the street. Traditionally, each house would have had a rice barn granary opposite which would a complementary row in the village. The street formed between the row of houses and the row of granaries is known as the alaman and is used as an area for work the drying of rice. The Mandailing also build their houses in row, however, like the Minangkabau the front gable faces the neighbouring house's rear gable. The Karo and the Pakpak do not lay their houses out in streets but around a village focal points such as the meeting hall (bale) or rice pounding house (