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One very important element in agriculture is water. The availability of water must be guaranteed so that plants can grow throughout the year. The lack of water availability means that crops cannot be produced throughout the year, causing farmers to become inadequate. Engineering irrigation is one of the systems that can regulate water availability throughout the year, but not all regions in Indonesia have such irrigation. Sambirejo Village is one of the villages in Langkat Regency which still utilizes a rainfed irrigation system. The main problem from Sambirejo Village, especially the Karya Tani Farmer Group, which is a service partner, is the unavailability of water to irrigate rice fields during the dry season. This unavailability of water causes a reduction in the productivity of farmers who are supposed to harvest three times to only twice a year. Through community service activities carried out the construction of borehole irrigation in Sembirejo Village. This method utilizes ground water as a source of water supply during the dry season. Drilled well irrigation can be enjoyed directly by farmers in the vicinity of the service area, and in the dry season the water needs for plants are available.

The spirit of advancing the regional economy in creating regional creative endeavors with various innovations combined through a combination of motifs, colors, models in accordance with current developments without losing the characteristics of local culture so that the preservation of ulos woven cloth becomes the host in its own region. To be able to achieve these goals, the government and the community jointly take local development initiatives by using all the potential they have by not forgetting the culture that is the main base of regional creative economic development that includes the readiness of human resources, the availability of natural resources that foster innovation and creativity, creating entrepreneurs, and creating renewable resources for the welfare of society. The existence of this activity can produce a variety of products that can attract consumers. Bags, wallets, bracelets, hats and other accessories are the result of training of weaving craftsmen in Samosir Regency.

Development planning in Indonesia is directed to create a society that is more prosperous, prosperous and equitable. Policy development is implemented to achieve high economic growth potential and by utilizing existing resources. But the fruits of development have not been felt evenly and sometimes there are regional disparities. This study aims to identify and analyze the influence of PDB, population, development expenditure and unemployment rate on the imbalance of economic development between districts / cities in North Sumatra. The data used is panel data from the year 2011 -2018 on 25 districts / cities in the province of North Sumatra. Sources of data from the Central Statistics Agency of North Sumatra Province with method Fixed Effect, with testing conducted by classical assumption test and statistical tests. With the help of Eviews 6.0 program data processing, data analysis results showed that the PDB variable is negative and significant effect at α = 10%, variables of population and development expenditure has positive and significant at α = 10%, while the unemployment rate did not significantly influence the disparity of economic development in North Sumatra. Regression results on the model is R-Squared = 0.994995, which means that the independent variables affect the dependent variable was 99.49% and the remaining 0.52% is influenced other variables outside the model are analyzed.