Artikel (421)
Coal bottom ash and cattle manure can be used as soil ameliorant. The application of coal bottom ash and cattle manure can improve the soil chemical properties, such as pH and the amounts of available nutrients in soil. The objective of the study was to understand the effect of coal bottom ash and c...
JOURNAL OF TROPICAL SOILS; Vol. 22 No. 2: May 2017; 87-95 | 2017
Pesticides are widely used in agriculture, including on peat soil. The objective of this study was to analyze the effect of the application of paraquat, difenoconazole, and butylphenyl methylcarbamate (BPMC) on CO2 emissions and concentrations of phenolic acids in a peat soil. Peat soil sample was t...
JOURNAL OF TROPICAL SOILS; Vol. 22 No. 2: May 2017; 77-85 | 2017
The extraction methods using Bray P-1, Mehlich-1, and Olsen solutions are the most frequently used in equilibrium condition to estimate the available P in the soil constituents. However, each method can gives some different values that may not describe the availability of soil P. Therefore, it is ne...
JOURNAL OF TROPICAL SOILS; Vol. 22 No. 2: May 2017; 67-76 | 2017
Varieties and organic materials have a very important role to the flux of methane (CH4) on paddy cultivation, especially on wetlands. Purpose of this research to determine the amount of methane emissions that released from paddy cultivation in acid sulphate soils with the use of different varieties ...
JOURNAL OF TROPICAL SOILS; Vol. 21 No. 3: September 2016; 179-186 | 2017
Intergrated Forest for Conservation Education of Wan Abdul Rachman (IFCE WAR) Great Forest Park is a conservation forest zone which has natural area and cultivated area. The natural area in Wan Abdul Rachman Great Forest Park consists of secondary forest, whereas the cultivated area consists o...
JOURNAL OF TROPICAL SOILS; Vol. 21 No. 3: September 2016; 171-178 | 2017
Productions of crude palm oil (CPO) produce waste which include the empty oil palm fruit bunch (EOPFB), palm oil mill effluent, shells, and fiber. The combustions of shell and fiber as boiler feed produce waste in the form of boiler ash. Boiler ash is very potential to use as an additive to improve ...
JOURNAL OF TROPICAL SOILS; Vol. 21 No. 3: September 2016; 161-169 | 2017
This research was aimed to determine the differences of physical and chemical characteristics from three natural zeolites from Tasikmalaya, Bayah and Lampung areas and to examine the characteristics of the natural zeolite adsorption capability to the micro-nutrients. The zeolite characterization ana...
JOURNAL OF TROPICAL SOILS; Vol. 21 No. 3: September 2016; 153-160 | 2017
An abandoned land after tin-mining activities are degraded lands with undulating and destructed land scape and low soil fertility status. The objective of this study was to determine the effects of organic amendments on the soil properties, growth, and grain yield of corn (Zea mays L.) on abandoned ...
JOURNAL OF TROPICAL SOILS; Vol. 21 No. 3: September 2016; 141-151 | 2017
As part of carbon pools, forest soil stores soil organic matter (SOM) that contains many elements including organic C, N, P, and K. These elements contribute nutrients for biogeochemical cycles within the ecosystem. This study was done to determine the ecological value of forest soil organic matter ...
JOURNAL OF TROPICAL SOILS; Vol. 21 No. 3: September 2016; 129-140 | 2017
One of factors that is interasting from Vertisol to be investigated beside the management of the soil fertility was color variations which can vary from gray to brown and brownish red. Exclusive characteristics of Vertisol are shrink swell capacity with clay dominant clay that make agricultural acti...
JOURNAL OF TROPICAL SOILS; Vol. 21 No. 2: May 2016; 123-128 | 2017