| Penulis/Author |
TRI MULYA HARTATI (1) ; Prof. Dr. Ir. Bambang Hendro Sunarminto, S.U. (2); Prof. Dr. Ir. Sri Nuryani Hidayah Utami, M.P., M.Sc. (3); Prof. Dr. Ir. Benito Heru Purwanto, M.P., M.Agr. (4); Dr. Agr. Makruf Nurudin, S.P., M.P. (5); KRISHNA AJI (6) |
| Abstrak/Abstract |
One of the indicators of land productivity assessment is soil fertility.
The causes of infertile soil have been widely reported. This study
aimed to evaluate soil fertility using the Soil Fertility Capability
Classification (SFCC) approach and to determine the relationship
between soil morphological and physiochemical properties and soil
fertility. The research was conducted in North Galela Sub-district,
North Halmahera Regency. The research framework began with the
interpretation of thematic maps, surveys, field observations, and the
making of soil fertility evaluation maps. Soil sampling was carried out
based on the stratified random sampling method and supported by
laboratory measurements according to USDA international standards.
The research result showed that the research area had 14 soil fertility
statuses. The fertility classes having the most significant limiting
factor were loamy texture (Ø<0>15% rock outcrop, moderate salinity
(0.2-0,4 mS cm-1), Na saturation >15%, and a rather steep slope (14%)
with Lithic Eutrudepts type. Both of these classes have a top layer
texture, and the bottom layer contains clay <35%, with limiting factors
of hard layer inhibiting root to a depth of 50 cm, extremely low
nutrient reserve, low electrical conductivity (EC) and high Na. The
limiting factors found in North Galela Sub-district were hard rootrestricting
layer, exchangeable K, electrical conductivity, Na
saturation, slope, and gravel. |
