To study the effects of different manure levels and two branch management methods on organic production of Schneider squash, an experiment was conducted at Research Farm of Ferdowsi University of Mashhad, Iran, during years 2005 and 2006. A split plot arrangement based on randomized complete block design with three replications was used. Treatments consisted of four manure levels (10, 15, 20, 25 t ha-1) and two branch management methods (with and without wood pole), which were allocated to main plots and subplots, respectively. Results showed that branch management method without wood pole was better than branch management method with wood pole. The first year results showed that increases in manure level had significant effect on fruit and seed yields (p<0.05). However, these traits were not significantly affected by manure levels in the second year. For both years, there were no differences in seed numbers due to manure levels. Seed oil content was slightly increased when manure level was increased from 10 to 25 t ha-1. This study showed that use of 20 t ha-1 manure is a suitable organic production system of Schneider squash which give a suitable yield whit high seed oil content, without using chemical fertilizers.

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