The research aimed tostudy determine the effect of plant growth regulator and dominance Paclobutrazol against this type of weeds in potato fields. Weed identification is done by using squares method using a rectangular plot with a size of 1 x 1 m and then the data were analyzed using the formula SDR. The results obtained are 21 species of weeds that grow at the age of 0 WAP (before if the land), 4 WAP (before application Paclobutrazol) and 8 WAP (after application Paclobutrazol). Dominace most in before if the land is Pennisetumpurpupoides with a value of SDR 41.10%, in the period of 4 WAP Chips are Ageratum conyzoides L dominace's with a value of SDR 24.58% and weeds Setariabarbata land dominace's research in the period 8 WAP Chips with value SDR 26.78%.

Potato plants are horticultural crops of vegetables are widely used community for the nutrient content is high enough. Characterizaion of morphology and anatomy and chlorophyll content of plants grown in vitro is different from in vivo. The purpose of this study is to see characterization of morphology, anatomy and chlorophyll content of potato plants in vitro and in vivo. This research has been done on plants tissue culture laboratory of the Faculty of Agriculture and the Basic Laboratory Andalas University, Padang from July to October 2019. Research of the experiment by observing the morphology, anatomy and chlorophyll content of the potato plant. Observations were made of the morphology of the potato plant in vitro and in vivo. For anatomical observations carried out with a microscope and chlorophyll test with a spectrophotometer. The results showed that there were differences in morphology, anatomy and chlorophyll content of the potato plant in vitro to in vivo. Stomata on the upper surface of the leaf are fewer than the bottom of the leaf. Chlorophyll content of the potato plant in vitro less than in vivo.

Potato var. Cingkariang is originated from Municipality Agam the Province of West Sumatra. This variety has low water content that is good for specific food process such as potato chips and crackers. However, the productivity is low compared to other varieties in Indonesia. Attempts should be made to increase the productivity of potato var. Cingkariang including the introduction of indigenous rhizobacteria to induce better growth and yield. The application of indigenous rhizobacteria is proven to be an easy and environmentally-friendly way to support sustainable agricultural system. This experiment was aimed at determining isolate of rhizobacteria suitable for increasing the growth and yield of potato var. Cingkariang. The experiment was carried out at the experimental station of BPTP Sukarami, Solok from July to November 2018. A completely randomised block design was assigned with three blocks and five treatments as follows: without rhizobacteria, isolate RZ.3.L2.1, isolate RZ.3.L2.2, isolate RZ.3.L2.5, and isolate RZ.1.L2.3. Data were analysed with analysis of variance and mean separation was tested according to HSD 5% level. Results indicated that the isolates did not affect the growth and yield of potato though isolate RZ.3.L2.5 was the best to promote the growth and yield of potato var. Cingkariang.

The potato plant is a primary horticultural crop that can be used in place of food diversification. The study’s goal is to find the best interaction between rhizobacteria and mycorrhizal on the growth and yield of the potato plant. This study was conducted at the Andalas University, Padang Faculty of Agriculture’s Microbiology and Plant Physiology Laboratories and experimental garden Institute Assessment and Agricultural Technology in Sukarami Solok, from July to December 2018. A 2-factor factorial design with replication and a fully randomized design was employed CRD. The type of rhizobacteria is the first factor: no Rhizobacteria, RZ.1.L2.3, RZ.3.L2.1, RZ.3.L2.2, RZ.1.L2.3, and the second factor is Multispora, Acaulospora, Glomus SP2, and Sclerocystis. Each treatment was replicated three times, consisting of 60 experimental units. The data were analyzed using the STAR application whit a 5% F test, and if significantly different, followed by a 5% HSD test. The outcome demonstrated an interaction between rhizobacteria and mycorrhizal on the fresh weight of the tuber.