Soybean (Glycine max (L) Merril) is one of the agricultural commodities to help the food crop of the Indonesian people. Soybeans are one of the commodities that support the implementation of food crop diversification programs and support national food crop security. Increasing soybean productivity in ultisols can be done through liming using eggshell powder. This experiment has been implemented at Jalan Muhammad Hatta, RT 02, RW 08, Pauh, Padang, West Sumatera from October 2020 to March 2021. The purpose is to get the best eggshell powder dose to increase the growth and yield of the soybean on ultisol. The experiment method uses a complete random design (RAL) with 5 levels of eggshell powder treatment 0; 25; 50; 75; 100 g / plant. Data on the observation are analyzed statistically with the F test at a 5% level. If the F count of treatment is greater than the F table, proceed by the test DNMRT at α level of 5% level. The results showed the use of eggshell powder affected the growth and yield of soybean in ultisol to a dose is 25 g /plant.

The implementation of intercropping is one alternative that can be done to increase the diversity of crops cultivated by farmers, due to the increasing activity of land conversion and limited ownership. The practices of growing several types of crops on the same land and time can provide several advantages. The plantation of corn and shallot on the same field and at the relatively same time will contribute to meet the community's needs for food and feed, especially during the current covid-19 pandemic. The use of various spacing of shallot within corn plantations is expected to increase income and land-use efficiency. The results showed that narrow space of shallots (10 cm × 15 cm) gave a higher unit area yield, and a wider space (20 cm × 20 cm) gave a higher land equivalence ratio comparing to other plant spacing (10cm × 15cm, and 10cm × 20cm).

This research is an advanced stage of exploration and characterization of job tears plants in West Sumatera Province. This study aimed to evaluate the nutrition content of six local job tears accessions of West Sumatra. The experiment used a completely randomized design (6 treatments and 4 replications) and was conducted from June until September 2022. The material was the seed from six accessions local job’s tears of West Sumatera, namely PTA- 1, KKD-3, PH-4, BTA-2, GT-2, and TJR-2. The data was analyzed using the F-test at 5%, and if there were significant differences, it was continued by analyzing DNMRT at 5%. Nutrition tests on ash and water content using the Gravimetric method, protein content using the Khjedal method, fat content using the Soxhlet method, and carbohydrate content using the by-difference method. The results showed that the PTA-1 accession had the highest percent ash content and the BTA-2 accession had the highest water content. The PTA-1, PH-4, BTA-2, GT-2, and TJR-2 accessions contained the best percentage of protein levels. In contrast, the PTA-1, KKD-3, PH-4, GT-2, and TJR-2 accessions have the highest rate of fat content, and the highest percentage of carbohydrate levels was found in the KKD-3 accession.