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Articles by Mira Ariyanti
Total Records ( 2 ) for Mira Ariyanti
  Mira Ariyanti , Syariful Mubarok and Yenni Asbur
  Background and Objective: The study of cover crop in oil palm plantation is more emphasized on its function as soil and water conservation. Cover crop utilization is one of agronomic practice to protect soil surface from any damage caused by rainfall on to the soil surface. Rooting system of the cover crop is able to hold the rain water and in turn maintaining soil water content. This study is aimed to study the effect of Asystasia gangetica (A. gangetica) as cover crop in mature oil palm plantation toward soil water content. Materials and Methods: Research was conducted in mature oil palm plantation. The experiment was conducted by constructing 4×2 m experimental plot between rows of oil palm. The experiment consisted of 2 levels of treatment namely planting cover crop A. gangetica and without planting cover crop. It was repeated 3 times. Hydrological parameter data, precipitation, initial soil water content (SWC), SWC during the experiment at specified soil depth (10, 20, 30, 40 and 50 cm) were observed from each trial plot. Soil water content (SWC) was measured using a sensor that connected with GardSens. Results: The results showed that A. gangetica caused soil water dynamics at the depth 0-20 cm that was at rhizosphere of cover crop. This has a good impact on the water availability of oil palm especially in dry periods when the rate of rainfall less than 60 mm/month. Conclusion: It was concluded that cover crop was able to conserve rain water and increased the water infiltration into the soil. This indicates that cover crop was potentially used to maintain and improve the availability of water requirement for the oil palm plantation.
  Yuyun Yuwariah , Nyimas Poppy Indriani , Mira Ariyanti , Elia Azizah and Dedi Ruswandi
  Background and Objectives: Intercropping of maize with sweet potato is one of cropping systems to improve land use efficiency of maize and sweet potato. The goals of the research were to study G×E interaction and to select adaptive maize hybrid for intercropping with sweet potato. Materials and Methods: Two experiments were set up in Bandung, Indonesia during rainy and dry season. The genetic materials were 13 new and one commercial check hybrids. These materials were cultivated based on a split plot design arrangement with two replications which the main plot comprised maize sole cropping and maize/sweet potato inter-cropping and the sub-plot was the hybrid. Data analysis covered the analysis of variance of maize hybrid in the maize sole cropping and in the intercropping system with sweet potato during both rainy and dry seasons. Homogeneity of variance error was tested using Bartlett test. Combined ANOVA was pursued to determine the interaction of G×E interaction (GEI) when variance errors were homogenous. Adaptability of maize hybrids was determined using genotype and genotype-environment interaction (GGE) biplot analysis. Results: The adaptive maize for intercropping with sweet potato was selected based on their land equivalent ratio (LER) and competitive ratio (CR). Genotype 3×4 was selected as potential hybrid variety for intercropping with sweet potato. Conclusion: The G×E interaction (GEI) plays an important role for male flowering and yield as well as genotype in this study. Selection of stable and adaptive maize hybrid variety for intercropping with sweet potato requires further multi-environment evaluation in several locations in Indonesia.
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