Jakarta, the nation’s capital of Indonesia, has 414 hectares of rice fields. The fields generally owned by developers that are not been used/idle land. In general, the existing cropping index of the land is only 1-2 which has potential to be improved. The main of this research was to obtain a model of agricultural technology innovation package to increase rice productivity and field cropping index in Jakarta throught the application component of’ Jajar Legowo (Jarwo) Super’ technology. The observation data consisted of primary and secondary data on the characteristics of cropping patterns for a year. The data were processed using descriptive and economic analysis was tested based on the Revenue Cost Ratio (R/C). The results of research showed that the application package or component of Jarwo Super technology showed an increase in the planting index by 0.3-0.8 and also an increase in productivity ranging from 5 t/ha to more than 7 t/ha. Based on the R/C analysis, the application of component of Jarwo Super’s technology package increases the cropping index from 1.83 to 2.32. It means that the introduced cultivation technology can improve farm efficiency every planting season and increase farmer income every year.
Soybean is a commodity which is less desirable for farmers to be planted yet it has an increasing high demand for processed food products made from soybean (tofu, tempeh, soy sauce, soy milk, etc.). As a strategic commodity,innovations are needed to provide solutions in order to maintain soybean production, especially in dry land. The purpose of this study was to assess the level of production of several soybean varieties grown using the intercropping system (turiman) with corn on suboptimal dry land. The study was conducted in East Lampung during the 2nd planting season from December 2019 to March 2020. The soybean varieties planted are Dena, Devon, Anjasmoro, and the local one (Tanggamus). The varieties of corn planted are the local existing one. The intercropping system used a corn-soybean pattern of 2 rows of corn and 7 rows of soybeans (Jale 2-7). The corn planted with zigzag pattern. The land area used for intercropping crops is 1 ha. The results showed that the intercropping system between soybeans and corn provided optimal soybean and corn production. The average soybean production was 1.548 kg/ha. The highest soybean production was the Devon variety (2,141 kg/ha) intercropping with corn (BS-18). Meanwhile, the Anjasmoro variety yielded 1.249-1.775 kg/ha, Dena variety yielded 1.428-1.541 kg/ha, and the local Tanggamus variety yielded 971-1.790 kg/ha. Corn production was 11.879-18.672 kg/ha of wet shelled corn. The average corn production was 15.110 kg/ha. The corn-soybean (Jale 2-7) intercropping system was able to optimize the use of dry land based on rainwater irrigation. This innovation contributed to the improvement of the cropping index from CI = 100 to 150-200.
Halotolerant bacteria are reported as a potential biostimulant to mitigate saline stress on various crops. The mechanism of halotolerant bacteria in elevating plant growth under saline stress is associated with their plant growth-promoting (PGP) traits. This study evaluated the activity of single-strain halotolerant phosphate-solubilizing bacteria and its consortia with halotolerant bacteria that were able to fix nitrogen and produce ACC deaminase in alleviating salinity stress on Zea mays seedlings under in vitro conditions. One single strain and five consortia of bacterial isolates were tested for seedling growth assay under four salinity levels (0, 60, 80, and 100 mM). In vitro assay showed that halotolerant bacteria B1 (Vibrio alginolycticus) and all consortia significantly increased root number at 60 mM salinity level. Consortium B3 (V. alginolyticus+Salinicola zeshunii) was also able to improve the fresh weight of seedlings significantly (by 63.3%). Moreover, inoculation of consortium B3 affected more proline and soluble sugar accumulation in Z. mays seedlings when compared to uninoculated seedlings. We conclude that the application of a consortium of halotolerant bacteria V. alginolyticus+S. zeshunii was potentially used in improving Z. mays growth in slightly and moderately saline areas.
Jakarta as a metropolitan area has rice fields spread across three urban areas. The rice marketing was usually conducted directly over harvest time, either to collectors who come to the harvest location or sell them to Subang or Indramayu. The aim of the study was to examine rice profitability and marketing in Jakarta. The study was carried out in three regions of Jakarta, namely North, West and East of Jakarta, through survey method. The respondents were 46 farmers with direct interview techniques. The profitability of rice farming was analyzed by using cost and revenue analysis, while rice marketing was analyzed by using qualitative descriptive. The results showed that rice farming in Jakarta was still profitable with the R/C ratio greater than one. The marketing chain of rice in Jakarta was generally very short. The farmers mostly sold the rice directly to large traders (Jakarta-Outside Trader; 85%), only a small proportion (15%) sold to regional collectors. As much as 90% of the grain was sold to the traders and 10% was used as seed or consumption. The selling price of rice was determined by traders based on quality of grain. The non-hulled rice price ranged Rp 4200-4500 per kg.
Swampland agroecosystem is a potential area for rice extensification program in order to increase food production. This study aimed to examine the growth and yield of several rice varieties planted in swampland agroecosystems in Mesuji Regency, Lampung Province. The experiment was conducted from November 2020 until March 2021. The planting location was in Tanjung Mas Jaya Village, Mesuji Timur District, Mesuji Regency, Lampung Province. The rice varieties planted were IAARD’s Superior varieties (Cilamaya Muncul, Inpara-2, Inpara-8, and Inpari IR Nutrizinc), multinational varieties (Mapan and Supadi) and existing local variety (Kebo). The observed variables were components of the growth and production of rice plants. The data were analyzed using Duncan test. The results showed that the yield was significantly different between the rice varieties planted. The lowest rice yield was obtained from the Inpara-2 variety (7.573 ton ha-1 of HDG). The highest yield of rice was in the Kebo variety (10.400 ton ha-1 of HDG). In order to gain optimal rice production in an area, it is necessary to use superior varieties of rice that have been adaptive to the local area.
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