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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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This research was aimed to get the role of nitrogen and the role of substitution synthetic nitrogen with organic nitrogen on red ginger cultivation. The research was conducted from March to September 2020 at Wonorejo, Jatiyoso, Karanganyar. The research was carried out using randomized complete block design (RCBD) with 1 factor, 4 treatments, and 6 repetitions namely P0 (Control), P1 (0.3 ton ha-1 ZA), P2 (0.15 ton ha-1 ZA + 1.99 ton ha-1 organic fertilizer), and P3 (3.98 ton ha-1 organic fertilizer). The data will be analyzed using analysis of variance and continued with a DMRT level of 5% if there is a significant difference. The result showed that the substitution of ZA (Zwavelzure Ammonium) fertilizer with organic fertilizer increased the yield of red ginger cultivation. The use of organic fertilizer with 3.98 ton ha-1 increased the number of leaves, the number of saplings, fresh and dry strawweight, fresh and stored rhizomes weight, and the length of rhizomes..

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.

Porang (Amorphophallus muelleri Blume) is a plant that produces tubers and is widely found in various parts of Indonesia such as Central Java, East Java and East Nusa Tenggara. Porang is used to make glue, food and cosmetics. The high demand for porang requires intensification and expansion of the area to be carried out. The target of land expansion is marginal land, as well as intercropping on forest land or by agroforestry. Appropriate light intensity can increase plant growth and yield. The research was carried out from March to July 2020 in the Perum Perhutani BKPH Pojok, in sonokeling(Dalbergia latifolia) forest, Kemadoh Batur Village, Tawangharjo in Grobogan district. This one factor study used a Randomized Completely Block Design (RCBD) with 4 levels. The treatment factors were light intensity due to shade by sonokeling : (P1) 100% light intensity, (P2) 75-90% light intensity, (P3) 50-74% shading intensity, and (P4) 25-49% light intensity. Each treatment was repeated 6 times, each experimental unit consisted of 3 plants. Data were analyzed using 5% variance test and continued with 5% DMR test if there was a significant difference. Up to 25-49% the light intensity of the  sonokeling shade does not affect the growth and yield of porang plants.

Plant spacing affects the number of plants, the process of receiving sunlight, water and nutrients which also affect the process of photosynthesis and assimilation between plants. The aim of this research was to examine the effect of different plant spacing and to evaluate plant spacing that could increase the growth and yield of hybrid corn. This research was conducted in UNS experimental field Jumantono, Karanganyar from June-November 2019. Design utilization was experimental method with Randomized Completed Block Design (RCBD) of 1 factor, consist of 4 levels, the treatment was 60 cm × 30 cm (J1); 60 cm × 40 cm (J2); 60 cm × 50 cm (J3); and 60 cm × 60 cm (J4). There was replicated 6 times. The result showed that plant spacing of 60 cm × 60 cm has increase on cob weight with husk, cob weight without husk, number of cobs per plant and grain yield per plant compared with plant spacing of 60 cm × 30 cm. The plant spacing treatment of 60 cm × 60 cm can improve quality of yield per crop but have not been able to increase the quantity of hybrid corn yield.