Keanekaragaman Vegetasi Pohon pada Lahan Pekarangan di Desa Tambakrejo Kecamatan Jombang Kabupaten Jombang

Tambakrejo Village is an urban area located in the Jombang District. Tree vegetation continues to decline; one of the factors is the conversion of the function of yardland to residential areas. Changes in the land area will impact the structure of tree vegetation. This research was conducted by purposive sampling in 4 hamlets. Transects and species were included as random effects using the transect quadrat method (quadrat transect) by purposive sampling with tree size (10x10 m²). The data analysis was done qualitatively and quantitatively. Quantitative data analysis using vegetation analysis, namely: Importance Value Index (IVI), Dominance (C), and Diversity Index (Ĥ). Strata 3 tree vegetation H’ index in Tambakrejo Village, each hamlet is different, for Tambakberas Hamlet, H’ index value is 3.11%, Gedang Hamlet 2.97%, Nglungu Hamlet 2.91%, and for Petengan Hamlet 2, 89%. Most of the hamlets in Tambakrejo Village fall into medium-level diversity. INP index of Tambakberas Hamlet of 22.59% and lowest 2.07%. Gedang of 27.57% and lowest 2.84%, Nglungu of 19.76%, and lowest 2.86% Petengan of 28.79% and lowest 2.73%, The lowest Important Value Index is due to the transfer of the function of yard land for residential areas.

Efektivitas Cyhalofop-butyl Mengendalikan Gulma pada Budidaya Padi Sawah Tabela

High competition in the early growth phase will suppress growth and reduce rice yields. Presence of weeds in the rice field ecosystem needs to be controlled. Weed control with herbicides is more effective than other controls. This study aims to determine the effectiveness of the herbicide Cyhalofop-butyl in controlling weeds in the cultivation of direct seeds rice cultivation. The research was conducted in Sekaran village, Wonosari sub-district, Klaten district, Central Java. The method used was randomized block with seven treatments and four replications. The treatment consisted of a dose of the herbicide Cyhalofop-butyl 100 g.L^-1with levels: (50, 75, 100, 125, 150, and 175 L.ha^-1), mechanical weeding and control (no weeding). The results showed that Cyhalofop-butyl at a dose of 50–175 L.ha^-1 was effective in controlling the weeds of <em>Echinochloa crus-galli, Leptochloa chinensis</em> and other weeds at 3 weeks after application up to 6 weeks after application, without causing phytotoxicity effect on rice plants, herbicide Cyhalofop-butyl does not affect the growth and production of rice but reduces competition between weeds and rice plans. Herbicide Cyhalofop-butyl applied at a dose of 50 - 175 L.ha^-1provide rice grain yield of 10,25 - 11,50 kg per plot.

Respons Hasil Padi dan Hara Tanah Sawah terhadap Bakteri Pelarut Fosfat dan Pemfiksasi Nitrogen

The condition of unfertile paddy field due to excessive inorganic fertilizer application causing soil degradation. Fertilizing techniques using phosphate solubilizing and nitrogen fixer bacteria are breakthroughs that should be developed in paddy cultivation to increase fertility soil and harvest of rice. This research aims to study on phosphate solubilizing and nitrogen fixer bacteria ability to increase the harvest of rice by increasing chemical and biological fertility of soil. The research was conducted in the greenhouse of Sawah Baru experimental garden, IPB University. The design used was a completely randomized design with one factor that was dosage of inorganic fertilizers (NPK) with seven levels that were control, NPK 100%, NPK 0% + bacteria, NPK 25% + bacteria, NPK 50% + bacteria, NPK 75% + bacteria and NPK 100% + bacteria. Each stage was repeated four times, so there were 28 units. The results of phosphate solubilizing and nitrogen fixer bacteria could produce more rice grain 0.32 ton.ha^-1 than NPK 100% (recommended dose). Biological soil fertility improved with the increased population of bacteria, but there was no improved soil chemical fertility of soil.

Penilaian Status Kesuburan Tanah Desa Tijayan Kecamatan Manisrenggo Kabupaten Klaten

Tijayan Village is located in Manisrenggo District, Klaten Regency, which has an area of agricultural land in the form of rice fields which is 105.80 ha of 155.3 ha of the village area. The extent of agricultural land in Tijayan Village needs to be maintained to increase agricultural products ranging from rice, secondary crops, and horticulture commodities. The researcher found a lack of information about soil maintenance in Tijayan Village. Therefore, the researcher conducted this research to determine and study the soil fertility and soil management efforts based on the limiting factors of fertility in Tijayan Village. In addition, soil fertility assessment is based on a desk study, detailed survey, soil analysis, making fertility distribution maps, and descriptive analysis. Determination of soil fertility status based on Soil Research Guidelines published by Soil Research Center, Bogor Indonesia, with parameters of cation exchange capacity, base saturation, total phosphorus, total potassium, and C- organic. Map made by using the ArcGIS 10.4 application. The fertility of Tijayan Village is categorized as low soil fertility class. The limiting factors for soil fertility are soil cation exchange capacity 3.47 me/ 100 g until 12.33 me/100g, total potassium &lt; 10 mg/100g, and C- organic 1.213% - 2.286% . Consequently, management needs to be done by adding organic matter to the soil, fertilizing organically or inorganically, and the principle of healthy plant cultivation for rice fields.

Pengaruh Ragam Jarak Tanam terhadap Pertumbuhan dan Produksi Sawi Hijau Organik

Modifying cultivation techniques potentially enhances mustard physical qualities to attain the demanded marketable value. The reputation of organic mustard propels farmers to implement modified cultivation techniques to improve harvest quality further. Planting space is one of the modifiable technical cultivations to achieve sustainable crop production. This research used soil planting media from acid dry land to optimize agricultural land use and cow manure as primary fertilizer to implement organic farming. This research objective is to figure the effect of different planting spaces on the growth and productivity of mustard greens that applied organic cultivation method. The preliminary arrangement of the research was a single-factor randomized block design. The factors were studied with different planting spaces: control without planting spaces, planting space of 20x20, 25x25, 30x30, 35x35, and 40x40 cm2. The outcomes revealed that the mean values of mustard green plant height (13.38 cm) and the number of leaves (9 strands) had significant differences to the control treatment (10 cm plant height and seven strands number of leaf). The results showed that the optimum planting space of organic mustard cultivation was 40x40 cm2 which achieved significantly higher plant height and the number of leaves than the control without planting spaces. This research's planting space of 40x40 cm2 is appropriately suitable for monocropping systems in acid dry land. It can alter plant population and distribute environmental resources for sustaining crop growth and production.

Hubungan Serapan P dengan Pertumbuhan Setek Lada pada Aplikasi Kompos Ampas Tahu dan Jerami Padi

This research aims to determine the effect of tofu dregs compost and rice straw compost to growth of pepper cuttings. The research by experiment to determine the best dosage of tofu dregs compost and rice straw compost and to determine the relationship between P uptake and pepper cuttings growth. The experiment design was a factorial Randomized Complete Block Design consisting of two factors (dosage of dregs of tofu and rice straw compost) with 4 levels respectively, each of combination replicated 3 times. The dosage dregs of tofu compost are without dregs of tofu, 200, 250, and 300 g per plant). Dose of rice straw compost are without rice straw compost,75, 100, and 125 g per plant. The results showed that the combination tofu dregs compost and rice straw compost did not effect on all growth parameters. Application dregs of tofu compost of 300 g per plant and 75 g per plant of rice straw compost had an effect on the formation of roots and leaves. The relationship between growth and P uptake was not significant.

Keragaan beberapa Varietas Sorgum terhadap Aplikasi Kitosan Iradiasi

Sorghum is a versatile, drought-resistant cereal crop. Increasing sorghum production needs special attention, although Indonesia has the potential for sorghum development. Irradiated chitosan can be used as a plant growth promoter and organic fertilizer to improve the performance of sorghum. This study aims to provide recommendations for sorghum varieties that are suitable for development and planting in dry land and are known to be able to control pests organically with the application of chitosan irradiation with optimum concentration. The experimental design was a separate plot with sorghum varieties (Numbu, Keller, and Kawali) as the main plot and the irradiated concentrations of chitosan (without irradiation, 2, 4, and 6 ml.L^-1) as subplots. The results showed that the sorghum variety and the optimum chitosan irradiation concentration of 2.76 and 5.15 ml.L^-1 increased the dry weight of stover per plant by 93.04 g per plant and increased the sugar content of sorghum with Brix 15.03%. The varieties of Numbu, Keller, and Kawali significantly affected plant height, number of leaves, weight of 100 seeds, and plant fresh weight per plot or forage of sorghum.

Response of Basil (Ocimum basilicum) Growth and Yield to Planting Densities and Row Arrangements in Tomato-Basil Intercropping System

Wondo Genet area, which is located in the Sidama zone of south Ethiopia, is characterized by a rapidly increasing human population and scarcity of arable land per household. There is a need for developing an efficient cropping system to use the limited land efficiently and to enhance food security. An experiment was, therefore, was conducted at Wondo Genet Agricultural Research Center under irrigated during the 2018 cropping season to examine the growth and yield of sweet basil under different planting densities and row arrangements in tomato-sweet basil Intercropping System. The experiment was conducted with two basil row arrangements (one tomato row alternating with one basil row (1T:1B) or with two basil rows (1T:2B)) and four basil population densities (66666, 50000, 33333 and 16666 plants.ha^-1) factorial arrangement in RCBD with three replications each consisting of ten treatments. Results of the study indicated that the row arrangement by planting density interaction significantly influenced the yield of basil with the maximum dry herbal (341.49 kg.ha^-1) and essential oil (22.86 kg.ha^-1) yields were recorded at 100% basil population density with a 1T:2B row arrangements. The cropping system significantly influenced the essential oil content and essential oil yield of basil. The highest essential oil content (1.26%) and essential oil yield (21.83 kg.ha^-1) of basil were obtained at sole planting compared to that of intercropping (0.96%) and (15.36 kg.ha^-1) with tomato showing 23.81% and 29.64% reduction, respectively. Therefore, intercropping 100% basil population in tomato by 1T:2B row arrangements could be recommended for Wondo genet and similar agroecology area, based on its better compatibility and productivity.

Growth and Yield of Soybeans in Various Growing Media Composition and Inoculation of Rhizobacteria on Marginal Soils

Soybean is one of the leading commodities that is being developed in Indonesia. Today, the increase of soybean needs is not followed by its production capacity. Meanwhile, the area of productive land for soybean farming is decreasing due to land conversion for non-agricultural needs. One effort that can be an alternative is using marginal land by applying appropriate technology such as manure and biofertilizer. So that, it was necessary to know the composition of manure and biofertilizer, which was appropriate to increase the growth and yield of soybean plants on marginal soils. Complete Randomized Design was used in the experiment with two factors. The first factor was the ratio of manure: soil (v:v) there are 0:1, 1:1, 1:2, and 2:1. The second factor was rhizobacteria inoculum, which included without rhizobacteria, exogenous rhizobacteria, and indigenous rhizobacteria. Results showed that the composition of the best planting medium for growth and yield of soybean is manure: soil 1: 1 and 1: 2. The source of the rhizobacteria inoculum is not a significant difference to the soybean’s growth and yield. Manure and soil 1: 2 with indigenous inoculum tended to produce the best total number of nodules and effective root nodules. Manure and soil 1:1 with indigenous inoculum produce the best of seeds number. Manure and soil 1:2 or 2:1 with exogenous inoculum tended to produce the best seed index weight (g per 100 seeds).

Tanggapan Morfologis dan Fisiologis Jagung Varietas Lokal Tambin terhadap Berbagai Pupuk Organik

Food crops of local varieties are solutions to realize national food security. To boost the production of local corn varieties, various organic fertilizer is promising to develop. This research aimed to study the morphological and physiological response of local variety corn Tambin. The research used a completely randomized design (CRD) one factor with seven treatments: various fertilizers. Various fertilizers consist of no organic fertilizer, liquid organic, compost, cow manure, rabbit urine, chicken manure, and goat manure. The results showed that the application of various organic fertilizers did not affect morphological characters of the local variety of corn Tambin. In This study, the application of various organic fertilizers did not affect the morphological character of corn, including the height of the plant, the number of leaves, the diameter of the stem, the length of the leaves, and the angle of Tambin corn leaves. Application of cow manure, compost, chicken manure, and goat manure could increase the leaf area aged 3 WAP (week after planting) by 716.13 - 1086.52 g per plant. In physiological character, the application of various organic fertilizers could not increase the net assimilation rate, relative growth rate, chlorophyll content, and the specific leave weight. The application of all organic fertilizers, except liquid organic fertilizer, increased the dry weight of plants at the time of harvest by 2.97 – 36.81 g.