Pengaruh Panjang Hari, Asam Indol Asetat, dan Fosfor terhadap Tanaman Kedelai dan Kualitas Benih dalam Penyimpanan

The objective of this study was to investigate the effect of photoperiod, indole acetic acid (IAA), and phosphorus on soybean plant growth and seed quality during storage. The trial was carried out at Sebapo Experimental Station, Jambi, Center for Post Harvest Research and Development, The Ministry of Agriculture and Center for Forest Research and Development, The Ministry of Forestry, Bogor from November 2009 until June 2010. Split-split plot design was used consisted of three factors, i.e. photoperiods (12 and 14 hours 54 minutes) as the main plot, concentrations of IAA (0, 75, and 150 ppm) as subplot, and dosages of phosphorus (0, 60, and 120 kg P2O5 ha-1) as subplot. The result showed that photoperiod, IAA, and phosphorus application had significantly improved production and seed quality. The path analysis showed that the weight of 1,000 seeds affected other variables. The seed protein content has the largest path coefficient compared to other variables. The treatment of mother plant with 14 hours 54 minutes photoperiod combined with IAA of 150 ppm and P2O5 of 120 kg ha-1 resulted in the highest seed quality during 90 days of storage in room temperature

Rice Ratoon Yield Response to Main Crops Cutting Height in Tidal Swamp Using Direct Seeding System

This study was aimed to evaluate the effect of main crops harvest cutting height on the yield of rice ratoon in the tidal swamp by using direct seeding system. The experiment was conducted in Telang Sari village, District of Tanjung Lago, Banyuasin, South Sumatra Province from November 2013 to April 2014. It measured plots 4 x 5 m through a randomized block design with 5 replications. The treatment was main crops harvest cutting height of 10, 20, 30, 40 and 50 cm above the soil surface. The results showed that the effect of cutting height on rice ratoon yield depends on the condition of photosynthetic and the amount of remaining nodes on the main crops stubble as an emergence ratoon shoots. The main crops cutting height of 20-40 cm above the soil surface increased the number of productive tillers, grain weight per hill, yield per plot, ratoon ability to grow per plot, and the rice ratoon/main crops yield ratio in tidal land by using direct seeding system

Dampak Pemberian Pupuk Hayati Cair terhadap Pertumbuhan Bibit Kelapa Sawit (Elaeis guineensis Jacq.) pada Pembibitan Utama yang ditanam di Tanah Ultisol

Djafar et al, 2019. The Impact of Administering Liquid Biological Fertilizer on the Growth of the Palm Oil Seed (Elaeis quineensis Jacq.) in Main Nurseries Planted in Ultisol Land. pp. 193-197.The objective of this study was to see the impact of the use of liquid biological fertilizer on the growth of oil palm seedlings in the main nurseries planted in the Ultisol land. This study was conducted in Sukarami Vilaage, Alang-alang Lebar Subdistrict, Palembang City, from August 2011 to November 2011. The design of the study used was a randomized block design which was arranged factorially. The factors were the amount of fertilizer and the time to administer the liquid fertilizer. One factor consists of 4 subfactors of fertilizer dose (25%, 50%. 75%, and 100%); and the other one consists of 3 subfactors of fertilizer time (once in 5 days, once in 10 days, and once in 15 days). Each treatment was carried out with three replications. The variables observed in the plant growth were: plant height, number of leaves, stem diameter and total leaf area. The measurement was carried out every 3 weeks, until the seedlings were 3 months after planting. The study used polybags measuring 40 cm x 50 cm. The media of growth was in the from of top soil of Ultisol type, from former rubber plantation. Each polybag was filled with soil with a weight of 15 kg in dry air condition. Each polybag is labeled according to the treatment. The seeds used were from early 3-month- old nurseries. After the polybag was ready to be planted with the seedlings of 3 months old and it was placed in a open area in accordance with the treatment chart. Then it was treated and maintained. The results of the study showed that the fertilizer dosage and the time of fertilizer application and their interaction did not have an impact on the growth of the main seddlings