Penelitian ini bertujuan untuk mengetahui pengaruh pemberian pupuk kompos nibung terhadap pertumbuhan dan hasil tanaman sawi caisim Varietas Kumala pada 2 Kali musim tanam.
Penelitian ini disusun dengan mengunakan rancangan acak kelompok (RAK) dengan 1 (satu) faktor yaitu takaran pupuk kompos nibung dengan 4 ulangan. Level perlakuan yang akan digunakan yaitu :T0 Control = 0 (gr/petak-1 ); T1 = kompos nibung 1000 (gr/petak-1 ); T2 = kompos nibung 1500 (gr/petak-1 ); T3 = kompos nibung 2000 (gr/petak-1 ); T4 = kompos nibung 2500 (gr/petak-1 ). Musim tanam kedua tidak dilakukan pengaplikasian pupuk kompos nibung.Data dan pengambilan data dilakukan di penanaman tanaman sawi pertama dan juga penanaman yang kedua, pengamatan yang dilakuan antara lain:tinggi tanaman (cm), jumlah daun (helai/tanaman), kehijauan daun tanaman sawi (SPAD 502), bobot panen segar tanaman (gr/tanaman) dan bobot kering tanaman sawi (gr/tanaman).Data yang diperoleh akan dianalisis secara statistik dengan ANOVA (Analysis of Varians) taraf 5 % untuk mengetahui pengaruh perlakuan. Apabila terdapat parameter yang berpengaruh maka dilakukan uji Beda Nyata Terkecil (BNT) Taraf 5% untuk mengetahui beda antar perlakuan.
Hasil penelitian menunjukkan musim tanam pertama dan musim tanam kedua memberikan pengaruh nyata terhadap tinggi tanaman (cm), jumlah daun (helai/tanaman), bobot panen segar tanaman (gr/tanaman) dan bobot kering tanaman sawi (gr/tanaman) namun berpengaruh tidak nyata terhadap kehijauan daun tanaman sawi (SPAD 502). Perlakuan pupuk kompos nibung takaran 2500 (gr/petak-1 ) memberikan nilai tertinggi terhadap tinggi tanaman (cm), jumlah daun (helai/tanaman), bobot panen segar tanaman (gr/tanaman) dan bobot kering tanaman sawi (gr/tanaman).
Kata kunci: pupuk organik, kompos nibung, sawi caisim, musim tanam, budidaya

This study aimed to determine the effect of compost nibung on growth and yield Varieties of mustard plants caisim Kumala in two planting seasons. The study prepared by using treatment randomized block desing (RAK) with 1 (one) factors which fertilizer compost nibung with four replicationsThe level treatment that will be used are of : T0 Control = 0 (gr/plot-1 ); T1 = Compost nibung 1000 (gr/plot-1 ); T2 = Compost nibung 1500 (gr/plot-1 ); T3 = Compost nibung 2000 (gr/plot-1 ); T4 = Compost nibung 2500 (gr/plot-1 ).The aecond planting season is not done applying compost nibung. Data and data collection was done in the first mustard crop cultivation and planting of the second, the observations made include : Plant height (cm),The number of leaves of the plant (leaf/plant), leaf mustard plants (SPAD 502), The weinght of the fresh harvest plant (g/plant), and weight of harvested dry mustard plant (g/plant). Data obtained will be analyzed statistically by ANOVA (Analysis of Variance ) lavel of 5 % to determine the effect of treatment. If there are parameters that affect the test conducted by the Least Significant Difference (LSD) Taraf 5 % to determine the difference between the treatment. The results showed in the first growing season and the second cropping season significant effect on Plant height (cm),The number of leaves of the plant (leaf/plant), The weinght of the fresh harvest plant (g/plant), weight of harvested dry mustard plant (g/plant) not yet effect on the green leaf mustard plants (SPAD 502). Nibung compost treatment doses in 2500 (gr/plot-1 ) provides the highest value againstPlant height (cm),The number of leaves of the plant (leaf/plant), The weinght of the fresh harvest plant (g/plant), weight of harvested dry mustard plant (g/plant) yet no reat effect on the green leaf mustard plants. Keywords: organic fertilizers, mustard, nibung Compost, plants caisim, gorwing season, cultivation