Artikel (426)
Seven actinomycetes isolated from Waigeo’s soil rhizospere have been characterized in growth, cellulase activities and pH. These actinomycetes were chosen based on their capabilities in cellulose degradation which were recognized by previous study. Those isolates are belonging to Streptomyces...
JOURNAL OF TROPICAL SOILS; Vol. 14 No. 3: September 2009; 239-244 | 2009
The effect of NPK compound (6:16:7) on chemical soil properties of Thapic Epiaquands, growth and yield of cucumber (Cucumis sativus) has been studied in Punthuk Rejo Village, Karanganyar District. The aims were to study the influence of NPK fertiliser on chemical soil properties, growth and yield of...
JOURNAL OF TROPICAL SOILS; Vol. 14 No. 3: September 2009; 229-238 | 2009
Utilization of organic fertilizer is an alternative to increase soil health and supply a small amount of plant nutrient. Meanwhile agricultural soil in Indonesia commonly have low organic carbon content (<2%) therefore application of organic fertilizer is recommended. Based on that, the aim of th...
JOURNAL OF TROPICAL SOILS; Vol. 14 No. 3: September 2009; 221-228 | 2009
Correlation between soil test phosphorus (P) and plant-available P parameters were affected by soil properties, such as soil pH, particle-size composition, and mineralogy. The objectives of this research were: (1) to determine P concentration extracted by several soil P test method in kaolinitic and...
JOURNAL OF TROPICAL SOILS; Vol. 14 No. 3: September 2009; 205-209 | 2009
The addition of ameliorant Fe3+ and rock phosphates containing high Fe cation can reduce effect of toxic organic acids, increase peat stability through formation of complex compounds and reduce carbon emission. The research was conducted in the laboratory and green house of the Departement of Soil S...
JOURNAL OF TROPICAL SOILS; Vol. 14 No. 3: September 2009; 195-204 | 2009
Analternative to replacing the expensive potassium (K) fertilizers, such as KCl, should be investigated by Indonesia as the third largest cocoa (Theobroma cacao L.) producing country. The objective of this study is to investigate the effect of plant derived ash (PDAsh) application on soil nutrient s...
JOURNAL OF TROPICAL SOILS; Vol. 14 No. 3: September 2009; 185-193 | 2009
Laboratory experiment aimed to study effect of oxalic acid, Na+, NH4+, and Fe3+ on the release of fixed potassium and basal distance of smectite in smectitic soils was conducted in Laboratory of Soil Sciences, Graduate School of Agriculture, Kyoto University, Japan. The experiment used four of topso...
JOURNAL OF TROPICAL SOILS; Vol. 14 No. 3: September 2009; 177-184 | 2009
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