This research was conducted with the objective of determining the interaction effect of chicken manure and NPK fertilizer doses on the growth and production of cucumber plants. The experimental design used was a Randomized Complete Block Design (RCBD) with two treatment factors, namely the application of chicken manure and NPK fertilizer, where each treatment was replicated 3 times. The data collected included parameters such as plant height, number of fruits per plant, fruit weight per plant, fruit length per plant, and fruit diameter per plant. The obtained data was then analyzed using Analysis of Variance (ANOVA) and further tested using Duncan's Multiple Range Test (DMRT). The results showed that the interaction between chicken manure and NPK fertilizer did not have a significant effect on all observed growth parameters. However, the combination of both fertilizers provided more optimal overall results compared to their separate use, especially in increasing the number and weight of fruits. Keywords: cucumber, chicken manure, NPK fertilizer
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