Artikel (426)
An understanding on relationship between water content and mineralization of carbon (C) and nitrogen (N) across soils varying in physical and chemical characteristics is required to assess the influence of soil physico-chemical properties on soil organic matter decomposition. However, such informati...
JOURNAL OF TROPICAL SOILS; Vol. 18 No. 1: January 2013; 45-52 | 2013
Source of P fertilizer which is used by farmers in upland acid soils area is generally acidulated phosphate rock (PR), such as tripel super phosphate (TSP), super phosphate 36% P2O5 (SP-36), as well as partial acidulated phosphate rock (PAPR) which contain 10-30% P2O5. Their effectiveness, however, ...
JOURNAL OF TROPICAL SOILS; Vol. 18 No. 1: January 2013; 1-9 | 2013
The farming systems in Konaweha watershed are mostly mixed garden that are partly managed intensively as wellas traditionally. The objectives of this research were to identify and classify agroforestry systems that were practicedby farmers, to study the effect of the agroforestry systems on soil pro...
JOURNAL OF TROPICAL SOILS; Vol. 17 No. 3: September 2012; 275-282 | 2013
Accurate information on the extent and spatial location of degraded lands is very important to plan their rehabilitation. So far, various institutions issue different estimation on the extent of degraded land in Indonesia led to big confusion for rehabilitation planning. Ministry of Forestry est...
JOURNAL OF TROPICAL SOILS; Vol. 17 No. 3: September 2012; 267-274 | 2013
The study was aimed to quantify volume of surface runoff, soil erosion and nutrient loss from the forest-agriculture landscape (forest margins) in Lore Lindu National Park Central Sulawesi. Surface runoff volume and soil erosion were measured daily on erosion plots. It was installed on sever...
JOURNAL OF TROPICAL SOILS; Vol. 17 No. 3: September 2012; 259-266 | 2013
Tidal fluctuation creates different soil chemical properties which is totally deviate from normal circumstances. Organic matter decomposition occurs with limited O2 supply, hence disturbing Carbon cycle which has a central role in the process and nutrient mineralisation. The research aimed w...
JOURNAL OF TROPICAL SOILS; Vol. 17 No. 3: September 2012; 253-257 | 2013
Phosphorous (P) contents in many soils are varies highly along with their ability to provide available P to plant growth. Soils may contain very high in total P, but low in available P due to high P adsorbed by soil matrix and all their adsorbing agents. This research which using natural materials w...
JOURNAL OF TROPICAL SOILS; Vol. 17 No. 3: September 2012; 245-252 | 2013
The main obstacle to increase rice yield in new opening paddy fields, is that high levels of dissolved ferrous ions(Fe2+) which toxic to plants. This research aimed to study the growth and yield of several rice cultivars tolerant toFe2+ in the new opening paddy fields with multi-packet technology. T...
JOURNAL OF TROPICAL SOILS; Vol. 17 No. 3: September 2012; 239-244 | 2013
Development of newly opened wetland rice fields both from dry land and wetland in Indonesia are important to meetrice growing demand, increase soil productivity, keep rural food security and provide jobs as well as generateincome. Most soils of newly opened rice fields are low in P and K contents, b...
JOURNAL OF TROPICAL SOILS; Vol. 17 No. 3: September 2012; 227-237 | 2013
Zinc and phosphorus are essential nutrients with low bioavailability in calcareous soils. Some plants exude organicacids to increase the solubility of these two nutrients. The objective of this study was to examine citrate exudation rates of different lupin (Feodora and Energy) and rapeseed (Dunkeld...
JOURNAL OF TROPICAL SOILS; Vol. 17 No. 3: September 2012; 219-225 | 2013