Artikel (23)
Effectivity of the Earthworms Pheretima hupiensis, Eudrellus sp. and Lumbricus sp. on the Organic Matter Decomposition Process (E.K. Anwar): The earthworms are the one of soil fauna component in soil ecosystem have an important role in organic matter decomposition procces. The ea...
JOURNAL OF TROPICAL SOILS; Vol. 14 No. 2: May 2009; 149-158 | 2009
The study was conducted in Keputran village, Tanggamus District, Lampung Province. The aim of this study to find out a proper combination of NPK fertilizer and chicken manure for the vegetable crops, especially chinese mustard (Brassica campetris Var. Chinensis L.) in order to increase the produ...
JOURNAL OF TROPICAL SOILS; Vol. 14 No. 3: September 2009; 211-219 | 2009
The objectives were to identify land characteristics of agroforestry system that influencing its benefit value, and to compile criteria of site specific. Location were identified by the Landsat 7 ETM+ that designed in the landuse utilization type: rubber agroforestry is identified by cyan old (RGB p...
JOURNAL OF TROPICAL SOILS; Vol. 14 No. 1: January 2009; 81-87 | 2009
There were 3 prospective isolates of cellulolytic bacteria resulted from the total of 31 isolates we found, i.e. C4-4, C5-1, and C11-1. Four combinations of bacteria including C4-4 + Xilanolytic (A), C5-1 + Xilanolytic (B), C11-1 + Xilanolytic (C), 45I-3 + 234P-16 (D), and control (E, without ba...
JOURNAL OF TROPICAL SOILS; Vol. 14 No. 1: January 2009; 71-80 | 2009
The research was conducted in order to know population of Rhizobium bacteria in the soil at several plant from Buton island, Muna regency, Southeast Sulawesi. The purpose of the study was to get the population data and pure cultures of Rhizobium bacteria.Rhizobium bacteria were isolated from 13 samp...
JOURNAL OF TROPICAL SOILS; Vol. 14 No. 1: January 2009; 65-70 | 2009
A soil water retention curve determination method is developed based on the use of gipsblock and capacitance sensors. The objective of the research was to provide a simple and quick method in characterization of soil water retention in the laboratory based on resistance and capacitance sensors. Undi...
JOURNAL OF TROPICAL SOILS; Vol. 14 No. 1: January 2009; 57-64 | 2009
The fertilizer availability as source of N, P, and K nutrient where plant responsif was difficult found by farmer. Thefore, It was needed information about nutrient availability in soil properties to know nutrient deficiency of its by maize as plant indicator. The objective of this research ...
JOURNAL OF TROPICAL SOILS; Vol. 14 No. 1: January 2009; 49-56 | 2009
Banjarese farmers in South Kalimantan apply a very minimum nitrogen (N) fertilizer in growing local rice. This practice has been adopted for many years. Yet, the grain yield level at farmers’ field is not necessary low. We are questioning about N sources for the crop. This study only focuses ...
JOURNAL OF TROPICAL SOILS; Vol. 14 No. 1: January 2009; 41-47 | 2009
Total content of potassium in smectitic soils is commonly high, however its availability for plant growth is frequently problem because it is fixed at interlayer space of 2:1 type of clay mineral. The research was  aimed to study the sorption and effect of Na+, NH +, and Fe3+  on soil availabl...
JOURNAL OF TROPICAL SOILS; Vol. 14 No. 1: January 2009; 33-40 | 2009
Phosphorus Sorption Characteristics of Red Soils from Lampung, West- and Central Java (S.A. Siradz and R.J. Gilkes): Red soil is a common name used to identify any soil showing yellowish to reddish colour, these soils mainly occur in tropical and subtropical regions. The term is frequently used to c...
JOURNAL OF TROPICAL SOILS; Vol. 14 No. 1: January 2009; 25-31 | 2009