Artikel (26)
Application of GIS technology (Geographic Information System), that is Digital Elevation Models (DEMs) for the analysis of  landform or slope have been conducted in the Citarum watershed, Purwakarta West Java Province from August until November 2003. Research aim to make landform classification o...
JOURNAL OF TROPICAL SOILS; Vol. 13 No. 2: May 2008; 139-144 | 2008
Hilly area Sumberjaya, West Lampung Province, South Sumatra, Indonesia, is one of the Province where deforestation increasing in the past 30 years as a result of the implementation of agricultural systems, especially coffee plantation. it is important to study the soil fauna in these natural rel...
JOURNAL OF TROPICAL SOILS; Vol. 13 No. 2: May 2008; 131-137 | 2008
Effect of the age and root distance of maize on the population of phosphate solubilizing microorganisms was studied. The rizosphere and non-rhizosphere soil of maize was setup in the special pots with dimension of 60 cm x 60 cm x 30 cm in the glasshouse. The Ultisols soil was planted with maize ...
JOURNAL OF TROPICAL SOILS; Vol. 13 No. 2: May 2008; 123-130 | 2008
Observation on the relationship between the depth of soil moisture assessment and turgidity of coffee plant has been carried out at 3 different agroclimates by survey method, i.e. Andungsari experimental station (Andosol soil type, >1.000 m asl. high, and rainfall type of C), Sumberasin experimen...
JOURNAL OF TROPICAL SOILS; Vol. 13 No. 2: May 2008; 111-122 | 2008
Local farmers in South Kalimantan (Banjarese farmers) use to grow local rice cultivars. The local rice growing areas are varied with distance from the coastal line. Consequently, the degree of salinity also varied. To overcome the salinity problem, farmers do their last transplanting earlier than th...
JOURNAL OF TROPICAL SOILS; Vol. 13 No. 2: May 2008; 103-109 | 2008
Rekomendasi Pemupukan P Untuk Tanaman Jagung Pada Tanah Inceptisols Menggunakan Pendekatan Uji Tanah
Productivity of maize in Central Sulawesi has been significantly low. The evidence has been a challenge on maize development in this area. Rational fertilization based on soil conditions and nutrient requirement of plants croped, has saved use of fertilizer, increased efficiency of the farm and also...
JOURNAL OF TROPICAL SOILS; Vol. 13 No. 2: May 2008; 95-102 | 2008
The releasing pattern of applied P in the acid upland soils and the soil properties influencing the pattern were studied. Surface horizons of six acid upland soils from Sumatra, Java and Kalimantan were used in this study. The releasing pattern of applied P (300 mg P kg-1) of these soils...
JOURNAL OF TROPICAL SOILS; Vol. 13 No. 2: May 2008; 87-94 | 2008
Three pedons of Andisol (TN-1, TN-2 and TN-3) developed from young volcanic materials of the Lokon, Soputan, and Lengkoan volcanoes respectively in the Tondano area, North Sulawesi, were studied in the field, and 18 soil samples were analysed in the laboratory for physical, chemical, and mineralogic...
JOURNAL OF TROPICAL SOILS; Vol. 13 No. 1: January 2008; 77-85 | 2008
The study aimed at building model of dry land management. Dynamic System Analysis was used to build model and Powersim 2.51 version for simulating. The parameter used in model were fertilizer (urea, SP-36, ACL), productivity (corn, cassava, mungbean), soil nutrient (N, P, K), crop nutrient r...
JOURNAL OF TROPICAL SOILS; Vol. 13 No. 1: January 2008; 67-76 | 2008
Rainforest conversion into agricultural lands in Nopu Upper Catchment such as cocoa plantations, maizes, cassava, peanuts, and scrub and bush were significantly increase soil erosions and surface runoffs, which in turn will decrease crops productivity and hydrologic functions of watershed. Soil ...
JOURNAL OF TROPICAL SOILS; Vol. 13 No. 1: January 2008; 59-65 | 2008