Respons Pertumbuhan dan Produksi Kailan (Brassica Oleraceae L.) pada Pemberian Berbagai Dosis Pupuk Organik Cair Paitan (Tithonia Diversifolia (Hemsl.) Gray )
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The objective of the research was to determine the growth and production of mustard with application of liquid organic fertilizer from paitan . Paitan has the potencial as the nutrition adder for plant because it can be rapidly decomposed and has many nutrients. Therefore, the application of liquid organic fertilizer from paitan is hoped to increase the growth and yield of mustard. This research conducted in Screen House, Faculty of Agriculture, University of Sumatera Utara, Medan on November 2013 to January 2014. The research used non-factorial randomized block design namely of liquid organic fertilizer treatment (4, 8,12,7, 14 and 21 ml/plant/aplication). Variable observed were leaf greeness scale, net assimilation rate, relative growth rate and fresh weight per plant. The result showed that the application of liquid organic fertilizer from Tithonia diversifolia significantly did not effect the growth and production of mustard. The best result showed by giving 8 ml/plant/application liquid organic fertilizer.