<![CDATA[Limited water availability and soil organic matter are the main causes of low dry land productivity and are the main challenges in efforts to develop them. Green mustard plants, which have a short harvest period and are quite adaptable to the environment, are suitable for development in dry land and are expected to reduce the risk of crop failure due water deficit. One source of organic material that is easily available at the farmer level is cow dung manure. This fertilizer is also able to help provide nutrients, increase the availability of moisture and microorganisms in the soil. It is hoped that the combination of the use of cow dung manure with mustard plants can be an afternative solution and efforts to increase the productivity of dry land. The research aims to determine the possibility of using cow dung as a source of organic fertilizer in the cultivation of green mustard on dry land. The research is based on a Randomized Block Design consisting of nine treatments with four replications. Treatments included a combination of different ages of seedlings without cow dung manure as a control; difference in seed age with 7.5 tons Ha-1 of cow dung manure and difference in seed age with 15 tons Ha-1 of cow dung manure. The data obtained were analyzed using variance and if there were significant differences, it was continued with the HSD test at the 5% level. The research result showed that applying cow dung manure can increase the growth and yield of green mustard on dry land. Seedlings aged 10 days after showing combined with the addition of 15 tons Ha-1 of cow dung manure can produce a fresh weight of 21.15 tons Ha-1 or 95.56% of the average potential productivity]]>
