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Articles by Akmal
Total Records ( 2 ) for Akmal
  Nasaruddin , Muh Farid , Akmal , Ifayanti Ridwan and Muhammad Fuad Anshori
  Background and Objective: Utilization of soybean plants as cover crops under oil palm trees is one of the solutions to maintain food security in Indonesia. Therefore, the objective of this research was to study the effect of organic matter derived from the Oil Palm Empty Fruit Bunches (OPEFB) and Trichoderma harzianum + Pleurotus ostreatus (Tri-Po) combination to the leaf physiological properties and productivity of soybean planted under 4 years old oil palm stands. Materials and Methods: A factorial design with Randomized Complete Block Design was employed as environmental design. The first factor was OPEFB compost consisting of three levels and the second factor is the Tri-Po combination which consists of four levels. The treatments were repeated three times resulted in 36 experimental units. Observations focused on some physiological characteristics and agronomical characters of the soybean. Results: The results showed that the use of OPEFB compost applied with Trichoderma harzianum and Pleurotus ostreatus improved the biological, physical and chemical characteristics of the soil, enhanced the physiological performance and productivity of soybean plants. The combination of 10 kg ha–1 OPEFB and 4g:6g Tri-Po was the best formula to improve the physiological characters of soybean leaves grown under oil palm stands. Conclusion: The research can increase the land economic value of smallholder or palm oil industry and increased the soybean supply for domestic demand.
  Akmal , Novirman Jamarun and Mardiati Zain
  Background and Objective: Manure accumulation in open areas for long periods of time promotes the synthesis of ammonia (NH3) by microbes and its emission to the atmosphere. Forage plants are used as ammonia trapsin poultry farms. This study aims to evaluate the potential of planting dwarf elephant grass and Gliricidia sepium around poultry farms to trap ammonia. Methodology: This study used a complete randomized design with a 2×3 factorial pattern with 6 replications as follows: Factor A: Two species (Dwarf elephant grass and Gliricidia sepium) and Factor B: The distance of the cages from the laying hen (1.5, 3 and 100 m). The parameters measured were the dry matter forage yield, plant height, protein content, ammonia concentration and in vitro dry matter digestibility. Results: The dry matter production of dwarf elephant grass was higher than that of Gliricidia sepium (0.5 vs 0.24 kg pot–1), but for the other parameters, such as the plant height, protein content and dry matter digestibility, the values for Gliricidia sepium were higher than those for dwarf elephant grass. Regarding the plant’s distance from the cage, a distance of 1.5 m yielded the highest levels of dry matter, forage yield, plant height, protein content and in vitro dry matter digestibility. The ammonia concentration at the cage of the laying hen was 7.7 ppm and at a distance of 3 m was 0.88 ppm. Conclusion: Gliricidia sepium was effective at absorbing air borne NH3. Plants 1.5 m from the laying hen cage showed the best results.
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