<![CDATA[This study is intended to evaluate the impact of product differentiation and customer relations on the increase in organic fertilizer sales volume in the Sidoarjo Regency area. A quantitative approach was applied through a survey involving 120 participants, namely farmers and organic fertilizer traders in the area. Sample selection was carried out by stratified random sampling technique. Information collection was carried out through a questionnaire, then processed using multiple linear regression analysis with the support of SPSS software version 25. The findings of the study revealed that product differentiation had a significant positive effect on the increase in organic fertilizer sales, with a coefficient of 0.458 (p<0.05). Similarly, customer relationships showed a significant positive impact on the increase in sales, with a coefficient of 0.412 (p<0.05). Simultaneously, product differentiation and customer relationships contributed significantly to the increase in organic fertilizer sales, with a percentage of 71.6% (R² = 0.716), while the remaining 28.4% were influenced by external variables that had not yet been explored. This study suggests that organic fertilizer makers in Sidoarjo Regency continue to innovate in product differentiation and strengthen long-term ties with consumers to encourage higher sales.]]>
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