We demonstrated experimentally that coconut husk ash is an excellent mineral fertilizer for immature coconut hybrids on developed peat, providing potassium (K) in particular. Coconut husk ash performed as well as potassium chloride (KCl) in a proportion of 2-2.5 to 1. At four years, 99% of coconut palms fertilized with husk ash, 92% of coconut palms fertilized with KCl and 26% of control palms were sexually differentiated. The cumulative yield in the first two harvesting years more than trebled between control palms (26 nuts per tree) and the palms fertilized with KCl (93 nuts per tree) or husk ash (105 nuts per tree). This is an important result, given the intensity of K deficiency and the increasing cost of imported fertilizers. Although coconut husk ash will never totally replace K fertilizer, it can recycle a substantial proportion of nutrients in a coconut plantation. It now remains to optimize its use on an estate level, by examining the feasibility and cost-effectiveness of its mass production and determining conditions for maximum efficiency.

Currently E-learning emerges as a new paradigm in the field of modern education and many studies have shown empirical evidence that it can effectively improve employee competency and performance. This study aims to identify and analyze the latest studies related to the implementation of E-learning from 2018 to 2023 to explore and see how far the phenomenon of the development of the E-learning method is when viewed from three timeframes, namely during the period before the Covid-19 pandemic, namely 2018 -2019, then during the Covid-19 pandemic, namely 2020-2022 and during the period after the Covid-19 pandemic in 2023 using the Systematic Literature Review (SLR) method with the help of Publish or Perish, Mendeley, Zotero, and Microsoft Excel tools. The results showed that of the 61 articles selected based on article searches in 2018-2019 (before the covid19 pandemic), 2020-2022 (during the covid19 pandemic), in April 2023 (after the covid19 pandemic), so that 9 articles were obtained that met quality assessment. Utilization of E-learning as a means of training and learning can improve employee competency. With the implementation of E-learning, employees can implement the skills or abilities that have been acquired which make employees more capable in responding to job demands. The e-learning process as a medium for employee training and development is able to provide a comprehensive learning experience for employees. E-learning is used as an alternative or a solution to face-to-face training to increase employee competence.