Artikel (426)
High rainfall intensity is major factor governing leaching process, where leaching is often the most important process of N loss from the field and lead to agricultural environmental pollution. In order to measure the movement of mineral-N in soil profile, a field research had been conducted in two ...
JOURNAL OF TROPICAL SOILS; Vol. 21 No. 2: May 2016; 67-78 | 2017
This paper presents the geochemical study of agricultural soil and river sediments along Sumani watershed, West Sumatra in Indonesia. We examined the distribution and abundances of 16 elements (Pb, Zn, Cu, Ni, Cr,V, Sr, Rb, Ce, Th, Zr, Si, Ti, Fe Ca, and P) in vegetable soil, sawah soil =and river s...
JOURNAL OF TROPICAL SOILS; Vol. 21 No. 1: January 2016; 49-66 | 2017
The conservation measures of peat or peat maintain under natural conditions many proposed to address the increase in carbon emissions from land use change and efforts to minimize of fire, but it can not entirely implemented due to peat land has the potential for development of the agricultural commo...
JOURNAL OF TROPICAL SOILS; Vol. 21 No. 1: January 2016; 41-47 | 2017
The main key in choosing manure is the level of ripeness, the ratio of Carbon and Nitrogen (C/N) and the Nitrogen, Phosphorus, Potassium (NPPt) contents. So far, the farmers have not effectively utilized organic materials as fertilizers in agricultural lands. Organic materials which can be used incl...
JOURNAL OF TROPICAL SOILS; Vol. 21 No. 1: January 2016; 33-39 | 2017
Paddy soil has different morphology and pedogenic characteristics compared to dry land, due to the influence of inundation during several months in a year. Puddling and drying that occurs in turns (redox cycle) in paddy soil can lead to the formation of concretions or rusty Fe and Mn. The main purpo...
JOURNAL OF TROPICAL SOILS; Vol. 21 No. 1: January 2016; 27-32 | 2017
Use of chemical fertilizers and pesticides on intensive land of both lowland and upland food crops have been shown to increase agricultural productivity significantly. Research aimed to study soil chemical characteristics and soil pesticide residues at some crops of organic and conventional farms. T...
JOURNAL OF TROPICAL SOILS; Vol. 21 No. 1: January 2016; 19-25 | 2017
The importance to return organic matter to the soil has been widely recognized, especially to agricultural lands that are low in organic matter and nutrients contents that will decrease the productivity of food crops. This study aimed to study the effect of biochar (rice husk and corn cob bi...
JOURNAL OF TROPICAL SOILS; Vol. 21 No. 1: January 2016; 1-7 | 2017
This research was conducted to study the population and diversity of soil and leaf litter mesofauna in arable soils under different types of vegetation and slope at the Agriculture Experimental Field (AEF) of University of Lampung. This study was designed to use the survey method. The soil and leaf ...
JOURNAL OF TROPICAL SOILS; Vol. 22 No. 1: January 2017; 55-66 | 2017
The aim of the research was to find out potential strainsof cellulolytic bacteria isolated from two tropical peat soils and to studythe potency of the isolated bacteria to decompose oil palm empty fruit bunch (EFB). The research was carried out in two stages: (1) isolation of cellulolytic bacteria f...
JOURNAL OF TROPICAL SOILS; Vol. 22 No. 1: January 2017; 47-53 | 2017
Efforts to increase the production of sweet corn can be done with the application of fertilizers, either inorganic, organic orits combination. In addition, the application of soil amendments such as biochar is also expected to improve soil fertility that will indirectly increase the production of sw...
JOURNAL OF TROPICAL SOILS; Vol. 22 No. 1: January 2017; 37-45 | 2017