Abstract
Firmansyah MA, Bhermana A. 2020. Characterization of earthworms (Lumbriscus terestris) population under several area of shallots cultivation. Jurnal Lahan Suboptimal : Journal of Suboptimal Lands 9(2): 208-217.In General, the problem of shallot commodities development was still used common farming without considering land suitability and other specific soil condition including aspect cultivation. The objective of this study was to clasify several lands characteristics for shallots cultivation and to observe earthworm (Lumbriscus terrestris) population based on their land suitability classes. The methodology used was land evaluation approach and field observation. This study was performed during  rainy season in 2018 at three locations with different soils, namely, peat soils/Histosol (IST), buried soil of Quartzipsamment above peat soils (ENT), and dry land of Dystropept (EPT). The population of earthworms is obtained by digging up an area of 1 m2 with depth of 20 cm at in four places of location of study. The calculation of earthworms is conducted by hand sorting. The results showed that the highest land suitability class at EPT S3tr, rt, nr, while for other locations are not suitable. The location of IST is classified into N3fb with several limiting such as flooding hazard during rainy season, while for ENT location, classified into Nrt, limiting factor is rough texture. High suitability class is not identical with high earthworm population density. Cultivation aspect that is able to increase soil pH become neutral condition and lower pesticide application affect earthworm populations. ENT locations that have neutral soil pH with lower pesticides applcation have the highest earthworm populations. Earthworm population density from high to low involve ENT> IST> EPT or 74> 33> 31 tails/m2.
Highlights
In Central Kalimantan, shallot has been cultivated since 2013 (Firmansyah and Anto, 2013)
For earthworms found on river banks of Kahayan river and Barito river in Central Kalimantan, shows that shallow ground water surface with rough texture are not suitable for earthworm habitats (Firmansyah et al, 2014)
The objective of this study was to clasify several lands characteristics for shallots cultivation and to observe earthworm (Lumbriscus terrestris) population based on their land suitability classes
Summary
In Central Kalimantan, shallot has been cultivated since 2013 (Firmansyah and Anto, 2013). One of several important factors that should be taken into account for farming activities is land suitability and other related factors that influence crop growth. This study was conducted in order to obtain further information about land condition under areas of shallot cultivation. The land condition for crop growth of shallot with high inputs of organic fertilizers, inorganic fertilizers and pesticides may affect earthworm populations, in the soils. For earthworms found on river banks of Kahayan river and Barito river in Central Kalimantan, shows that shallow ground water surface with rough texture are not suitable for earthworm habitats (Firmansyah et al, 2014)
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