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Purpose : Black soybean is a legume plant that has economic value on effective seeds and nodules, but out of the number of varieties that have been released until 2013 only 11 varieties are with agronomic height input innovation. The research objective is to obtain superior local genotype, as a source of new black soybean varieties, accompanied by compost and biochar-based agronomy practical innovations for sustainable agriculture. Research Method : The first treatment was compost-based agronomy innovation with biochar (B): b1 (1 t ha-1 +1 t ha-1) and b2:(1.5 t ha-1+ 0.5 t ha-1). The second treatment was 4 genotypes of local black soybean (G): KB1, KA3, CK5, KH4, and as a comparison was a Cikuray variety with each treatment repeated three times. Anova test results of factorial patterns and DRMT Duncan’s test at the 5% level. Findings : Anova test results of factorial patterns and DRMT Duncan’s test at the 5% level indicate that practical innovations based on compost and biochar agronomy accompanied by genotype have no effect. Both agronomy innovations b1 and b2 have the same effect on agronomic characters. Expected Genotypes that were superior to their agronomic character were shown by KH4 and KA3 genotypes with potential productivity of 3.28 t ha-1 and 3.19 t ha-1, and increased by 21% and 17.71%, respectively. The genotypes of KB1, KA3 and KH4 produced the same number of nodules compared to Cikuray varieties. Limitations : This research doesn’t study about soil condition after the experiment. Value : The novelty in this study is the use of low doses and directly applied to planting holes, obtained local genotypes superior agronomic characters for sources of new varieties, and obtained practical innovations based on compos and biochar agronomy for guidance for farmers who later selected regions as centers for varieties new black soybeans.

Agronomic Characteristics and Nodules from Black Soybean Genotypes Due to Application Compost and Biochar as Sustainable Agriculture