Artikel (421)
Soil in Kalimantan Island is considered infertile. To obtain a reasonable crop yield a high input fertilizer package should be applied. The situation will be worsening when an open pit system of coal mining adopted. Failure in re-arranging the soil layers can result in decreasing soil fertility comp...
JOURNAL OF TROPICAL SOILS; Vol. 20 No. 2: May 2015; 95-99 | 2016
Development of acid upland in Indonesia still has constraints. To solve the constraint, environmental friendly technology by using organic matter and beneficial microbes is necessary. This study aimed to determine the effectiveness of bio-organic fertilizer formulas for increasing productivity of up...
JOURNAL OF TROPICAL SOILS; Vol. 20 No. 2: May 2015; 85-93 | 2016
It is generally known that zeolite has potential for heavy metal adsorption. The objectives of this study were to synthesize and characterize zeolite ZSM-5 and to figure out the adsorption capacity of zeolite ZSM-5 for heavy metals of Cu2+, Pb2+ and Cd2+. Characterization of zeolite ZSM-5 incl...
JOURNAL OF TROPICAL SOILS; Vol. 20 No. 2: May 2015; 77-83 | 2016
Application of peatland amelioration can improve soil quality, reduce GHG emissions, and increase carbon sequestration. The research aimed to study the effect of peatland amelioration on oil palm and rubber carbon stock improvement. Research was conducted from August 2013 until June 2014. The ...
JOURNAL OF TROPICAL SOILS; Vol. 20 No. 2: May 2015; 67-75 | 2016
Municipal solid waste and agricultural waste have different ratio C/N and nutrients contents. They can be used as compost row materials. The purpose of the research was to get an optimum combination of both wastes to improve compost quality, to meet the Indonesian National Standard 19-7030-2004. Com...
JOURNAL OF TROPICAL SOILS; Vol. 20 No. 1: January 2015; 59-65 | 2016
Converting of tropical rain forest into plantation and agriculture land uses has been claimed as a main factor that affects to global warming and climate change. In order to provide a comprehensive information of the issue, a field observation on peat properties in relation to CO2 emission und...
JOURNAL OF TROPICAL SOILS; Vol. 20 No. 1: January 2015; 47-57 | 2016
The low-efficiency problem in fertilizer application can be overcome by controlling fertilizer solubility, i.e. by rendering the fertilizer to be released gradually; such material is also known as slow-release fertilizer (SRF). This research was aimed to formulate SRF by coating technique using acry...
JOURNAL OF TROPICAL SOILS; Vol. 20 No. 1: January 2015; 37-45 | 2016
A glasshouse trial was performed to determine changes in phosphorus (P) nutrition and the yield of sword bean (Canavalia ensiformis (L.) DC.) following the application of different rates and types of P fertilizer in an acid upland soil of East Lampung. Two different types of P fertilizer, namely SP-...
JOURNAL OF TROPICAL SOILS; Vol. 20 No. 1: January 2015; 29-36 | 2016
Intensive agriculture has been well known to cause decline in soil organic matter and nutrient content of the soils. Therefore, efforts should be taken to avoid this from happening. Addition of organic fertilizers like compost has been increasingly become more important in Indonesian agriculture in ...
JOURNAL OF TROPICAL SOILS; Vol. 20 No. 1: January 2015; 11-19 | 2016
Research was conducted in Gowa, South Sulawesi at dry land farmer during two years. The aims of the research was to get the best method in ascertainment of availability class of potassium (K) for maize in dry land. The research used a single location approach, which made some of K nutrient artificia...
JOURNAL OF TROPICAL SOILS; Vol. 20 No. 1: January 2015; 21-27 | 2016