Rice is the staple food and its cultivation requires a specific land condition. The population growth, urbanization, and plantation expansion together with socio-economic development are the driving factors of the riceland decline in Deli Serdang Regency of North Sumatera, Indonesia. As a consequence, likely availability and sustainability of rice production are threatened. Hence, it is important to understand how the future landuse and population change will affect the riceland area and production. In the lack of spatially simulated information for the future which could be useful in planning the riceland areas, the study objectives were to project the landuse change by 2040 under three scenarios, Business as Usual (BAU), Potential Riceland Protection (PRP) and Conservation Oriented (CO), and to investigate the impact of consumption demand on the sustainability of rice production. Landsat satellite data of 2009 and 2018, several spatial GIS data, and survey data were analyzed in ArcGIS, Dyna-CLUE, and SPSS software to generate the landuse classification and to simulate the future landuses; while the population projection by 2040 was derived from a Geometric Model. The results showed that forest and riceland areas will decrease with the continuous increase of plantation and urban areas under BAU scenario, but could be protected and increased under PRP scenario. The sustainability of rice production depends not only on the total riceland area, but also the productivity, the population growth, the consumption rate, and the policy. The simulated results of three scenarios serve as an important input to planning for protecting the riceland areas and thus sustained rice production in Deli Serdang Regency.
This research was conducted to determine the characteristics of the rice farming system in Serdang Bedagai Regency and to recommend policies to increase the contribution of rice agribusiness to rural development. The studies carried out included the existing technology used by farmers, production, productivity, cropping index, analysis of farming system and distribution, and marketing of products. The research method used in this study is a survey method with a purposive sampling technique to 40 farmer respondents. Structured interviews were also conducted with traders, rice mill entrepreneurs, and policymakers. The data analysis used in this research is qualitative and quantitative analysis. Qualitative analysis is used to find an overview of the technology, production, productivity, cropping index, and marketing and to explain the costs and income of rice farmers which are described descriptively. The quantitative analysis used is the analysis of farm costs and income, which are the ratio of revenue and costs (R/C ratio) analysis and the cost per kg milled dry grain. The results showed that the cultivation technology used by farmers was varied, there were 23 villages whose rice productivity was still below 5 tons/h, 10 villages in 3 sub-districts had the cropping index still below 2, the R/C ratio of rice farming was 1.45, where the cost to produce 1 kg of milled dry grain in Serdang Bedagai Regency, on average are IDR 3,099. Meanwhile, the distribution and marketing of the harvest were controlled by big rice mill entrepreneurs.
As the third highest of harvested area for maize among regencies in North Sumatera Province, Simalungun Regency shares significant contribution for the total production. Unfortunately, there is a declining trend of production for five years influencing by total harvested area and productivity. These two factors are the justification to conduct this study with the aims to identify the potency of land resource for maize by measuring land-limitation factors and to introduce new varieties. Soil physic and chemical data were collected from field survey and laboratory analysis, and GIS and Evaluation System for Land Suitability tools were operated to detect the land potency. Meanwhile, Random Block Design with three replications performed to determine the well-adapted varieties. The results show that Simalungun Regency has 165,311 ha of high potency of land for maize and 238,834 ha and 26,952 ha has low and no potency of land, respectively. Nutrient retention and erosion hazard are the predominant limitation factors. Especially for adaptive-variety testing, this study found that Srikandi Kuning provides the highest productivity, 7.79 t/ha, that insignificantly difference with Bisma, Gumarang, Arjuna and Sukmaraga by 7.44, 7.27, 7.06 and 6.89 t/ha respectively. Conversely, Krisna has the lowest productivity, 4.98 t/ha, which is lower than provincial level. Applying land conservation measures and adopting new/tolerant variety be able to support sustainable maize production.
The purposes of this study were to identify the potency of citrus farming and to recommend citrus seeding development policy in North Sumatra Province. The method used in this study was desk study, and secondary data was analyzing descriptively. Citrus seeding is one of the keys to the success of citrus farming. North Sumatra Province is one of the centers for citrus development in Indonesia. The seed is one of the keys to the success of farming. Currently, citrus development in North Sumatra is still constrained by the availability of seeds. Only a few proportions of the seeds that are currently used by farmers were from local breeders and usually carried out if there was a government program. The shortage of citrus seeds came from outside of North Sumatra Province as the Bangkinang citrus variety which is parent stock source was not guaranteed. One of the citrus types in North Sumatra Province is called ‘siam madu’ citrus. The opportunity for siam madu citrus seeding development was feasible, considering that siam madu citrus was very popular for citrus farmers.
The cropping index of rice is one of determining factors to increase rice production. In certain areas of Deli Serdang Regency, the rice crop has high possibility of being sowed three times annually. Unfortunately, some parts of this regency still have a low cropping index, then affecting the stagnant production. Hence, this study was conducted to identify the determinant variables and explain their relationship with rice cropping index and also to construct the strategic actions to increase the rice cropping index. This study was conducted in six districts with 180 total respondents, using household-based survey method. The descriptive statistics analysis and Pearson correlation analysis were performed using the SPSS tool to achieve the objectives. The result shows that frequency of flood occurrence on riceland, productivity, total income from agricultural sector, number of household member, age, education level, distance of irrigation channel to the riceland and the irrigation status are the significant determinants of rice cropping index. In addition, some strategic actions that have to introduced to the local government and the farmers are sowing the adaptive varieties which is tolerant on flooding condition; using the precise planting calendar to find the exact schedule for planting time; planting the certified variety that gives high productivity; increasing the capacity building, especially the cultivation skill, through following the technical guidance; cconstructing the irrigation system and repairing/maintaining the irrigation infrastructures; and harvesting the water to support the sustainable water for riceland.
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