Flood is general phenomenon found in most areas of Indonesia. This can obstruct rice crop cultivation on lowland swamp areas. Fertilization strategy is one of the efforts to increase rice crop growth and production on flooded condition. The objective of this research was to determine the best fertilization strategy on vegetative stage related to rice crop growth and production under flooded condition at two types of lowland swamp. The experimental design used in this research was split-plot design with three replications. The main plot was fertilization treatment consisting of P1 = base fertilization, P2 = fertilization before flooded, P3 = fertilization after flooded and P4 = fertilization before and after flooded. The subplot was rice variety which consisted of V1 = Inpara 3, V2 = Inpara 5, V3 = IR 64 and V4 = Ciherang. The results showed that fertilization strategy was capable of increasing rice crop growth and production under flooded condition at two types of lowland swamp. Rice variety Inpara 5 added with fertilizer before flooded on shallowbackswamp and fertilizer addition before and after flooded on middle-backswamp was the best treatment that had produced rice yield with magnitude of 4.48 and 3.43 t ha -1 , respectively.
, using Randomized Block Design with two treatment factors and three replications for each treatment. The first factor was rice varieties (V): V1 = IR 64; V2 = Inpara 5. The second factor was fertilizer (N): N0: without submergence, all N fertilizer was given during planting; N1: all N fertilizer dose was given during planting; and N2: 1/2 dose of N fertilizer was given during planting; the rest was given at 42 days after planting. The submergence was during 7-14 days after planting; N3 = the entire dose of N fertilizer that was given during planting, N4 = 1/2 the dose of N fertilizer that was given during planting, and the rest was given at 42 days after planting. The submergence was during 7-14 and 28-35 days after planting. The results showed that the management of nitrogen fertilizer application had effect on rice growth and production which experienced dirty water submergence stress; the application of 1/2 dose of N fertilizer given during planting had the best effect on rice growth and production; the longer the submergence period for rice variety, the higher the effect on rice growth and production.
Gribaldi et al, 2018. Effort in Increasing the Growth and Production of Gambas through Adjusting the Planting Distance and Weeding Time on Dry Land. JLSO 7(2): Luffa acutangula (angled loofah) provide great benefits so that it is popular and consumed by the public. The increasing of L. acutangula production continues to be carried out in line with increasing market demand, one of them is through the improvement of cultivation techniques, such as fertilizer application, spacing and time for weeding. This study aimed to determine the increase in growth and production of L. acutangula plants at various planting distances and weeding time. This study used a randomized block design which was arranged through factorial with three replications. The factors studied consisted of: plant spacing (J), spacing of 40 cm x 50 cm (J1), spacing of 60 cm x 50 cm (J2), and spacing of 80 cm x 50 cm (J3). Weed weeding treatment (P) consists of: No weeding (P0), weeding at 15 DAS (days after sowing) (P1), weeding at 25 DAS (P2), weeding at 35 DAS (P3), and weed-free (P4). The results showed that the treatment of plant spacing and weeding time affected the plant growth and production. Spacing at 40 cm x 50 cm resulted in the best of plant growth and yield, and weeding at 35 DAS and weed-free plant produced the best growth and yield.
This study aims to determine the effect of regulating the provision of nitrogen fertilizer on several rice varieties on the growth and yield of rice in ratoon system at the Tidal swampland. A split plot design was employed in this experiment. The main plot was nitrogen fertilizer application (N) consisting of N1, N2, N3, and N4. The subplot is rice varieties (V) consisting of Inpari 30 (V1), Inpara 3 (V2), Inpari 33 (V3), Inpari 43 (V4) and Hipa 5 Ceva (V5). The results showed that ½ dose nitrogen fertilization given at planting + ½ dose at primordia had a good effect on the growth and yield of the main crop, whereas 1/3 dose nitrogen fertilization given at planting + 1/3 dose at primordia + 1/3 dose at harvest tends to have a good effect on ratoon yield. Variety Hipa 5 Ceva produced highest yield of unhusked rice (i.e. 4.9 tons ha-1 for the main crop and 2.71 tons ha-1 for ratoon) at (N3): 135 kg N ha-1 fertilizer, when ½ dose was given at planting + ½ dose at primordia. The variety Hipa 5 Ceva with various nitrogen fertilization strategies provided the highest total grain yield in the ratoon system at tidal swampland.
Penggunaan bibit kelapa sawit yang bermutu akan menentukan keberhasilan jangka panjang pengelolaan perkebunan kelapa sawit. Salah satu faktor yang menentukan keberhasilan pembibitan kelapa sawit di tingkat prenursery adalah ketersediaan air yang cukup. Bila terjadi kekurangan air dapat mengakibatkan penyimpangan pertumbuhan dan menghasilkan bibit yang tidak prima. Penelitian ini bertujuan untuk melihat kemampuan sabut kelapayang dikombinasikan dengan pupuk bokasi kotoran ayam untuk menahan air di dalam polibag terhadap pertumbuhan bibit, menggunakan Rancangan Acak Kelompok (RAK)yang disusun secara faktorial, terdiri dari dua faktor perlakuan dan tiga kali ulangan. Faktor pertama adalah bobot sabut kelapa (S) terdiri dari 3 level yaitu :S0 =0 g, S1 = 25 g dan S2 = 50 g per polibag. Faktor kedua bobot pupuk bokasi kotoran ayam (B) terdiri dari 4 level yaitu B1 = 50g,B2 = 100 g,B3 = 150gdan B4 = 200 g per polibag.tanah yang digunakan dalam penelitian ini adalah tanah Ultisol (PMK seberat 10 kg per polibag. Hasil penelitian menunjukkan bahwa penambahan sabut kelapa 50 gdan bokasi kotoran ayam 200 g per polibag seacra tunggal memberikan pengaruh yang nyata terhadap pertumbuhan bibit kelapa sawit di pre nursery, namun tidak terdapat interaksi diantara kedua perlakuan.
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