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<p>One way intentification food plant by intercropping systems. This study aims to determine effect differences in yield and find out what varieties maize growth and provide the best yield of intercropping maize varieties grown peanuts when planted in Additive Series. The study is based on Randomized Complete Block Design (RCBD), with one factor of maize varieties (V) with four replications. V01: Kancil monoculture peanut varieties, V02: monoculture Bisma corn varieties, V1-V6 : multiple varieties of maize cropping pattern Kancil peanut varieties (V1: Arjuna maize varieties, V2: Bisma corn varieties, V3: maize varieties Lamuru, V4 : maize varieties Srikandi Putih, V5: Sukmaraga corn varieties, and V6: maize varieties Gumarang). Analysis was performed by F test level 5 % and if the significant difference was followed by Duncan Multiple Range Test (DMRT) level 5%. The yield tend to be highest in groundnut V6 of 2.7 tons/ha and corn V4 of 5.03 tons/ha.</p>

Red ginger has not been cultivated intensively, so that there was a production decrease in 2018 of 4.24% from 2017. The increase in red ginger cultivation can be done by fertilizing organic fertilizers. This study aimed to obtain an effective dose of organic fertilizer in increasing the growth and yield of red ginger. From March to October 2020, the research was conducted at the UNS experimental area in Wonorejo Village, Jatiyoso, with an altitude of 778 masl. The study was conducted using a randomized complete block design (RCBD) with 1 factor and 5 treatments it is P0 (control), P1 (dose 1 kg. m−2), P2 (dose 1.5 kg. m−2), P3 (dose 2 kg. m−2), and P4 (dose 2.5 kg. m−2). The results showed that the application of organic fertilizer had an effect. The effective dose of organic fertilizer in increasing the growth and yield of red ginger was a dose of 2 kg. m−2.

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One of the effects of climate change is a decrease in land productivity and subsequently causes a decrease in crop production. The decrease in land quality will be higher with the use of inorganic fertilizers. Alternative solutions to these problems are the use of vermicompost fertilizers and PGPR. The aim of this research was to examine the role of Vermicompost fertilizers and PGPR on the growth and formation of bulbil tubers. The research design used Randomized Complete Block Design (RCBD) with 2 factors, the first factor was Vermicompost (5 tons ha−1, 10 tons ha−1, 15 tons ha−1, 20 tons ha−1), the second factor was PGPR (with PGPR and without PGPR), repeated as many as 3 times. The results showed that the combination of Vermicompost and PGPR significantly affected the number of bulbils, the combination of vermicompost 5 tons ha−1 + with PGPR produced the highest bulbils. Vermicompost and PGPR had no significant effect on plant height, net assimilation rate, fresh weight, bulb weight, number of bulbils, and number of bulbs. There was no significant interaction between the treatment of vermicompost and PGPR on plant height, net assimilation rate), fresh weight, bulb weight, and a number of bulbs.