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This plant has a very large opportunity to be developed on ex-mining land, considering that this plant is an adaptive non-timber forest product plant that grows and produces naturally without inoculation (injection) on ex-mining land: limestone, nickel, rocky sand, tin and coal. and added witharbuscular mycorrhizal fungi (AMF) and liquid organic fertilizer such as Yomari on Aquilaria malacensis Lamk. AMF is able to increase root growth, root range, so that it can facilitate roots to absorb water and nutrients through external hyphae and later obtained quality seeds which have many and strong roots. Yomari liquid organic fertilizer has high organic and nutrient content, can increase soil organisms and improve soil pH and. This study aimed to obtain the best interaction between the dose of AMF and the concentration of Yomari liquid organic fertilizer on the growth of Aquilaria malacensis Lamk seedlings. in the ex-limestone mine soil, the best dose of AMF was obtained on the growth of Aquilaria malacensis Lamk seedlings. in limestone ex- mining soil and the best concentration of Yomari organic fertilizer on the growth of Aquilaria malacensis Lamk. in the former limestone quarry. This research was conducted from June to November 2022 in the nursery of the Faculty of Agriculture, Andalas University. This study used a factorial experimental method in a Completely Randomized Design (CRD) with 2 factors, namely the first factor was the administration of the AMF dose which consisted of 5 levels: 0.0 grams (C0); 15 grams (C2); 30 grams (C3) and 45 grams (C4) and the second factor concentration of Yomari organic fertilizer consisted of 5 levels: 0.00 ppm (Y0); 25.00 ppm (Y1); 50.00 (Y2); 75.00 ppm (Y3) and 100.00 ppm (Y4), each treatment level consisted of 4 replications. Observational data in the form of qualitative and quantitative data were analyzed using the F-test at a significance level of 5%. The different effects on the treatment were analyzed by further test of LSD at 5% level. Observations were made including: percentage of live seedlings, increase in seedling height, increase in number of leaves, widest leaf width, root weight, and percentage of roots infected by AMF on lime-mined soil media. There is an interaction between the dose of AMF and the concentration of liquid organic fertilizer on the growth of agarwood-producing plant seeds (Aquilaria malacensis Lamk.)) on the ex-limestone mining soil. Giving a dose of AMF 45 grams with a concentration of 100 ppm liquid organic fertilizer was the best in increasing the percentage of life, increasing the number leaves, increase in plant seed height, widest leaf width, percentage of agarwood-producing plant seeds infected with AMF.

Potato (Solanum tuberosum L.) is a plant prefetch queue of five seasonal vegetables that are much in demand in Indonesia. Potato needs tend to increase every year in line with population growth and development of the food processing industry are made from raw potatoes. In general, potato production in Indonesia is still relatively low and still do to meet their import requirements. But the government has always sought to boost the national potato production. One of the efforts to improve potato production with the use of Plant Growth Promoting Rhizobacteria (PGPR) and fungi Mycorrhizal Fungi (AMF). The use of microorganisms PGPR and Mycorrhizae naturally associated with plant roots and have the ability to improve plant growth. The purpose of this study is to obtain the best interaction between species rhizobacteria and mycorrhiza on the growth of potato plants. This study is a two-factor factorial experiment with three replications in a randomized block design. First factor is type rhizobacteria which are without rhizobacteria, RZ3.L2.1, RZ3.L2.2, RZ3.L2.5. The second factor is the type of mycorrhizal wich are Glamus mycorrhiza, mycorrhizal and mycorrhizal Acaulospora sclerocystis, Data were analyzed by analysis of variance and DNMRT 5%. The results showed that the best treatment for the growth of the potato crop is rhizobakteria RZ3.L2.2 with mycorrhizal glamus.

The aim of this study was to determine the concentration of 2,4-D growth regulator and the most effective BAP for the formation of callus for endemic patchouli plants in western markets, namely Akasesi Situak in vitro. The research has been carried out at the Andalas University Faculty of Agriculture Tissue Culture Laboratory, in September November 2018. The method used is Random Trap Design (RAL) with 2 treatment factors, namely 2,4-D (0, 0.5, 1, 1.5, and 2 mg). / l) and BAP (0, 0.5, 1, 1.5, and 2 mg / l), the total consists of 25 treatments with 3 replications with codes namely A1S1, A1S2, A1S3, A1S4, A1S5, A2S1, A2S2, A2S3, A2S4 , A2S5, A3S1, A3S2, A3S3, A3S4, A3S5, A4S1, A4S2, A4S3, A4S4, A4S5, A5S1, A5S2, A5S3, A5S4, A5S5. Data were statistically analyzed by F test at 5% real level. If F count is greater than F table 5%, then proceed with Duncan's New Multiple Range Test (DNMRT) at the level of 5%. The results of the study show that on the treatment of A3S3 (1.0 mg / l 2.4-D + 1.0 mg / l BAP), A3S4 (1.0 mg / l 2.4-D + 1.5 mg / l BAP), A3S5 (1.0 mg / l 2.4 -D + 2.0 mg / l BAP) and A4S1 (1.5 mg / l 2.4-D + without BAP) produce explants. whereas in other combination treatments up to 30 days of observation did not produce patchouli plants in the Situak Accession plant.

The purpose of this study was to determine the effect of cobalt-60 gamma ray irradiation which could expand the genetic security of white taro cultivars (Xhanthosoma sagittifolium (L)). This research has been carried out in June - September 2018 at the Center for Isotope and Radiation Applications, the National Atomic Agency (BATAN) Jakarta, and the Experimental Garden of the Faculty of Agriculture, Andalas University, Padang. Experimental method of gamma cobalt-60 ray irradiation with 0 gray dose; 30; 60; 90; and 120 gray, observations with Single Plant using Student test t test at level 5%. The results showed that the Ld 50 (Lethal dose 50) value, at the level of Gammacell 220 light irradiation (Cobalt-60) occurred in 60 gray, leaf color variation only occurred at irradiation rates of 30 and 90 gray while for plant heights occur at all levels of irradiation.

The purpose of this study was to evaluation of several local rice genotypes in the Mandailing Natal Province of North Sumatra. This studay was and has been conducted from April 2017 to October 2017. Data observed in the form of quantitative data and qualitative data of local rice plants. The results showed that rice cultivars were found in various regions in Mandailing Natal District with a high variety of characteristics. Sampling was done by purposive sampling from 23 sub-districts in Mandailing Natal District. Data observed in the form of quantitative data and qualitative data of local rice plants. The results showed that rice cultivars were found in various regions in Mandailing Natal District with a high variety of characteristics. The sigudang genotype was the best genotype with a total grain weight of 82.6 grams. Genotype Sisorang have a good agronomic appearance.

Salak (Salacca edulis), commonly known as snake fruit, is one of Indonesia's local fruit preference with a promising commercial prospect for the development of horticultural product. This fruit is a superior fruit commodity of Padang Sidempuan which has been recognized nationally. A significant change of geographical altitudes from lowland to highland supported the salak growth when planted in South Tapanuli. This study was aimed to evaluate the phenotypic variability as well as its correlation of salak planted in three different subdistricts of South Tapanuli representing low, mid and highlands. Sampling was conducted using purposive sampling method where 30 accessions of salak were collected from all those three subdistricts in South Tapanuli. Both qualitative and quantitative traits were statistically analyzed and evaluated for its phylogenetic using NTSYS 2.02. According to the phylogenetic analysis, 37 morphological traits resulted in a similarity coefficient ranging from 0.34-0.68. Of all accessions tested, two accessions (MC4 and MC5) were closely clustered with a coefficient of 0.68. Moreover, 7 traits were positively correlated to sugar content, including plant height,number of fruit bunch, length and width of leaflet, number of leaf, fruit weight and flesh thickness.

The purpose of this study was to obtain The best dose of Arbuscular Mycorrhizal Fungi (FMA) and the best maize varieties for the growth and high yield of plants in coal mining tailings. This research was conducted using a completely randomized factorial design with 2 treatments. The first factor was the dose of arbuscular mycorrhizal fungal (6 treatments). The second factor was 4 varieties of corn. Data was analyzed statistically using the F-test at the 5% significance level. Significant differences were further tested using Duncan’s Multiple Range Test also at the 5% level. Parameters measured were: percentage of roots infected with the Arbuscular mycorrizal fungi during growth and at the time of harvest, kernel with per plant. A dose 25 grams of FMA was the best dose for growth and yield of Bisi-2 with avarage production 179,8 gram per plant in coal mining tailings.