Contribution of the effect of cow manure and biofertilizer bio-extrim and their interaction on the performance of Brassica chinensis L.

Abstract Pakchoy ( Brassica chinensis L. or rapa subsp. ) experienced a decreased production and productivity. Sustainable agriculture could be the solution using organic fertilizer cow manure biofrtilizer Bio-ekstrim. The objective of this research was to determinine contribution effect bio-extrim their interaction on performance Pakchoy. A factorial randomized complete block design with three replications used at experimental garden Agriculture Faculty Universitas HKBP Nommensen in Medan. seeds Nauli F1 variety used. Ripe 0, 10, 20, 30 t/ha. Bio-extreme dosage were 50, 100 l/ha. Observed data plant height, number leaf, weight whole harvest plot, selling plants. result revealed that estimated variance component blocks, cow, Bio-ekstrim, error contributed 1.97, 72.50, 0.28, 9.74, 15.50% total variation (100%). combination (30 t/ha) Bio-ekstrim (50 l/ha) best produce highest plants i.e 15.14