摘要
In Gunung Sewu, which locates southeast of Yogyakarta, cone karst composed of the Tertiary pure limestone is utilized intensively for agriculture. High population has been supported by efficient agricultural landuse in this area. The population in the high density areas is increasing until 1990. Especially, the higher steep slope and the top of cones have been utilized as fields by deforestation since few years, because of continuous rapid increase of population.
In Gunung Sewu, which locates southeast of Yogyakarta, cone karst composed of the Tertiary pure limestone is utilized intensively for agriculture. High population has been supported by efficient agricultural laiduse in this area. The population in the high density areas is increasing until 1990. Especially, the higher steep slope and the top of cones have been utilized as fields by deforestation since few years, because of continuous rapid increase of population.
On the other hand, shallow wide polje has developed on the plateau Wonosari of Tertiary marl and calcareous tuffacious deposit. The calcareous soils of catena from chronic Vertisol to pellic Vertisol make possible io maintain an efficient agricultural landuse. The pellic Vertisol, which distribute in the lowland of polje, supports high productivities of wet rice harvesting 2 times a year with irrigation from karst springs and underground water.
出处
《中国岩溶》
CAS
CSCD
北大核心
1992年第S1期102-111,共10页
Carsologica Sinica
