Shallots can produce optimally in locations that are suitable for growing conditions. Until now, East Kalimantan province still lacks around 7,000 tons of shallots every year, even though the potential land resources in this province are suitable for the development of shallots. Therefore, to support agricultural development, especially shallots in KutaiKartanegara Regency, East Kalimantan Province, an adaptation test of several superior varieties was carried out, in Liang Ilir Village Kota Bangun District, KutaiKartanegara Regency from August to October 2019. The research objective was to determine the adaptation of four superior varieties of shallots in specific location conditions in Kutai Kartanegara Regency. The research design was a randomized block design (RBD) with four shallot varieties, namely Pikatan, Katumi, Bima-Brebes, and Local, which was carried out on four implementing farmers as replications. The adaptation of Shallots using tubers, spacing 20 x 15 cm²; dolomite lime 1.5 t ha⁻¹; manure 15 t ha⁻¹; Urea 150 kg ha⁻¹; SP-36 amount of 200 kg ha⁻¹; NPK 250 kg ha⁻¹ and pest control. The research results showed that the productivity of shallots from four varieties ranged from 12-14 t ha⁻¹.

Agricultural liming is a central issue in tackling soil acidity problems in tropical soils. A study on liming in a 1,845.2 ha sub-watershed Kemuning, Jember employing Exchangeable Alumunium (Al-dd) and Effective Cation Exchange Capacity (eCEC) methods. Our results showed that the average need for lime is 0.26-3.2 tons/ha in calcite and 0.9-3.5 tons/ha in dolomite form based on the Al-dd method. Furthermore, using the Effective CEC method, the average need for lime is 1.2-3.2 tons/ha. Based on the Al-dd way, there is an area of 336.4 ha that requires lime of 470.9 tons, while using the effective CEC method, there is a 676.2 ha area that takes lime 946.7 tons. There are differences in the location and amount of lime required in the two calculation methods.

Tropical climatic conditions accompanied by high rainfall are supporting factors for soil acidification in Indonesia's drylands. One of the conventional management technologies that are most widely used to improve soil acidity is liming. This study observed the effectiveness of various doses of Aglime ameliorant for improving acid soil and its effect on the growth of maize (Zea mays L.). The study was conducted in Pasar VI Kwala Mencirim Village, Sei Bingai District, Langkat Regency, North Sumatra from June to October 2020. The experimental design of this study was a non-factorial randomized bock design consisted of 7 treatments of Aglime ameliorant dosage with four replications. The results showed that the application of various doses of Aglime ameliorant was able to increase soil pH, height, and maize production which the highest pH value, height, and production were obtained at Aglime dose of 5 tons Ha-1 (AL 5). The effectiveness of Aglime ameliorant to increase soil pH is reflected in the relative agronomic effectiveness (RAE) which is overall > 95% (101,7 – 274,5%) for the tested Aglime dose of 1 to 5 tons per hectare (AL1-AL5).