Ilmu Pertanian (Agricultural Science)
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Pengaruh Pemberian Kapur dan Ukuran Bulbil Terhadap Pertumbuhan Iles-Iles (Amorphophallus muelleri Blume) pada Tanah Ber-AL Tinggi
No full textKemampuan Tumbuh Kembali Pucuk Tananam Teh yang Dipangkas Setelah Tanaman Mengalami Cekaman Kekeringan
No full textPeranan Parasitoid Telur dan Varietas Padi dalam Pengendalian Hama Terpadu Penggerek Batang Padi Kuning
No full textLand Resources Inventory In Developing Countries : A Problem of Collecting and Generating Relevant Data A Typical Case of Atmospheric Water Balance Inventory.
No full textPlant Species Composition and the Carrying Capacity of Grazing Fields in Taman Jaya West Java
No full textThe influence of urease and nitrification inhibitor on loss of N and oil palm harvest in peat
Get PDFOil palm is one of intensively planted in Indonesia, large-managed for industrial oil palm. This study aimed to know the influences of urease and nitrification inhibitor on loss of N and oil palm harvest in peat. The research was conducted at Sukamandang Village Coconut Plantation, Seruyan Tengah District, Seruyan Regency, Central Kalimantan Province. The research used a single factor of field experimental method with Randomized Completely Block Design (RCBD). Urea and ZA fertilizer were used in this study with the following treatment: N0= Without N, N1= Urea (195 kg.ha-1 N), N2= Urea + 0.12% NBPT-NPPT (195 kg.ha-1 N), N3= Urea (156 kg.ha-1 N), N4= Urea + 0.12% NBPT-NPPT (156 kg.ha-1 N), N5= Ammonium Sulfate (427 kg.ha-1 N), N6= Ammonium Sulfate + 0.8% DMPP (427 kg.ha-1 N), N7= Ammonium Sulfate (324 kg.ha-1 N), N8= Ammonium Sulfate + 0.8% DMPP (324 kg.ha-1 N). The research result indicated that the use of NBPT and DMPP inhibitors did not affect N levels in the leaves and the free fatty acids. Urea + NBPT treatment had no N loss for about 30%–50% which was lower than urea without N, whereas ammonium sulfate + DMPP had smaller N loss than all treatments without N fertilization. Fertilization using urea + NBPT and ammonium sulfate + DMPP increased the production of FFB and yield of oil palm
Morphological characters of root and yield of three cocoa (Theobroma cacao L.) clones in the field with dead-end trench
Get PDFCocoa (Theobroma cacao L.) is a perennial crop originated from tropical regions, divided into Criollo, Forastero, and Trinitario. Demand for cocoa has increased, but the productivity is still low. The increase in production could be achieved by improving crop management and using superior clones. RCC-70, RCC-71, and KKM-22 are recommended as the superior cocoa clones. Dead-end trench can reduce erosion and surface run-off as well as improve rooting and soil organic matter sequestration. The objectives of this research were to study the effects of dead-end trench application on morphological characters of roots and yields of three cocoa clones and to determine which cocoa clone(s) performed a signifificant yield increase with the application of dead-end trench. The research was conducted in August 2018–April 2019 at Pagilaran Ltd. cocoa plantation in North Segayung Production Unit, subdistrict Tulis, Batang, Central Java. The experiment was arranged in a randomized complete block design with two factors and three replications as block. The first factor was dead-end trench application (with and without dead-end trench application) and the second factor was cocoa clones (RCC-70, RCC-71, and KKM-22). This study showed that application of dead-end trench and clones significantly increased root fresh weight, root dry weight, seed fresh weight, and seed dry weight, but had no significant effect on fruit diameter, fruit length, root length, and root surface area. RCC-70 clone, coupled with the application of dead-end trench, resulted in the highest seed dry weight compared to RCC-71 and KKM-22 clones
Response of upland rice (Oryza sativa L.) cultivars to different shade levels in sandy soil
Get PDFThe study aimed to determine the response of upland rice under different shade levels. The experiment was conducted in Srigading village, Sanden District, Bantul Regency, Yogyakarta from July 2016 to March 2017. The experimental design applied was the split-plot design with three replications. The main plot was the shade level consists of three levels i.e. 0%, 25% and 50%. The sub plot was the upland rice cultivar consists of three levels i.e. ‘Inpago 8’, ‘Situ Patenggang’, and ‘Batutegi’. The results showed that some variables observed changes due to shade that are make increased the plant height and leaf area. The maximum number of tillers and the number of productive tillers in the 50% shade treatment decreased, as well as the total plant dry weight and the productivity. Other observation such as root/shoot ratio, panicle length, percentage of filled grain per panicle, number of filled grains per panicle and 1000-grains weight upland rice showed no significant difference