68 ABSTRACT Forest conversion to coffee-based agroforestry initially leads to a decrease in the rate of litterfall and the standing litter layer covering the soil, reducing food for earthworms and replenishment of soil organic matter (SOM) and likely related to a reduction of soil macroporosity. On sloping lands, a reduction of macroporosity and soil cover is likely to increase overland flow and erosion. This research was aimed at quantifying litter thickness, earthworm populations and soil macroporosity in response to land use change, in the Sumberjaya benchmark area (West Lampung), by comparing (a) remnant forest as a control, (b) multistrata shaded coffee with fruit and timber trees as well as the nitrogen-fixing (Erythrina sububrams and/or Gliricidia sepium) as shade trees, (c) shaded coffee with the same nitrogen-fixing Erythrina sububrams and/or Gliricidia sepium as shade trees , (d) monoculture (sun) coffee. Plots were selected with a minimum age of 7 years, in three slope classes: (a) flat (0-10 o ), (b) medium (10-30 o ) and (c) steep ( > 30 o ). The measurements were carried out in November 2001 to Juli 2002. The mean standing litter was 2.1, 1.8, 1.2 and 1.2 Mg ha -1 for forest, shade coffee and monoculture coffee, respectively, without a significant influence of slope. Soil organic carbon contents C org were compared to the reference value C ref for soils of the same texture, pH and elevation, based on a large Sumatran data set. The C org value for the ALIH GUNA LAHAN HUTAN MENJADI LAHAN AGROFORESTRI BERBASIS KOPI: KETEBALAN SERESAH, POPULASI CACING TANAH DAN MAKROPOROSITAS TANAH Kurniatun Hairiah 1 , Didik Suprayogo 1 , Widianto 1 , Berlian 1 , Erwin Suhara 2 , Aris Mardiastuning 2 , Rudy Harto Widodo 3 , Cahyo Prayogo 1 , dan Subekti Rahayu 3 1) Universitas Brawijaya, Fakultas Pertanian, Jurusan Tanah, Malang 65145 2) Alumni Jurusan Tanah, Fakultas Pertanian, Universitas Brawijaya 3) World Agroforestry Centre, ICRAF S.E. Asia, P.O.Box 161, Bogor 16001