Artikel (421)
A simple and cheap method to detect herbicide residue in soil and water is urgently needed as the quantity and frequency of herbicide usage is steadily increasing in Indonesia which raises concern about the effects of herbicide residue in soil and water. This study is the third step from a serie...
JOURNAL OF TROPICAL SOILS; Vol. 13 No. 3: September 2008; 199-208 | 2008
The use of organic materials aimed at reducing the dependence on inputs such as chemical fertilizers can contribute to sustainability and improving the low N fertilizer efficiency of rice plants in paddy soils. Therefore, better understanding of N transformation in flooded soils, particularly th...
JOURNAL OF TROPICAL SOILS; Vol. 13 No. 3: September 2008; 189-197 | 2008
Landform of Gunungsewu karst topography dominated by positive forms consists of hills and negative forms of dolines. On the micro toposequen of karst,  most of dolines dominated by red soils which hue 2.5 YR – 5 YR, whereas on hills by soils which hue 5 YR – 7.5 YR. The aim of r...
JOURNAL OF TROPICAL SOILS; Vol. 13 No. 2: May 2008; 161-170 | 2008
Crop and management factor value is significantly corelated with outputs of ANSWERS model especially on soil erosion.  Using daily crop and management factors (daily C factors), the ANSWERS model performs well in predicting soil erosion which is showed by determination coeffient (R2 = 0.89), ...
JOURNAL OF TROPICAL SOILS; Vol. 13 No. 2: May 2008; 155-160 | 2008
Land degradation is a serious problem in the Upper Sekampung Watersheds. This is because the farmers cultivated in steep land to coffee crops without  in adequate soil and water conservation practices.  The land degradation is mostly caused by erosion. The erosion problem not only ...
JOURNAL OF TROPICAL SOILS; Vol. 13 No. 2: May 2008; 145-153 | 2008
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