Jurnal Ilmiah Pertanian http://journal.unilak.ac.id/index.php/jip <p>Jurnal Ilmiah Pertanian (JIP) is an open-access journal that publishes original research articles on agricultural advances and various other agricultural resources at the local level to increase global awareness.. <br><br>Initially, the Jurnal Ilmiah Pertanian (JIP) was published twice yearly, every February and August. However, starting with Volume 19, 2022, Jurnal Ilmiah Pertanian (JIP) is a triannual journal published every March, July, and Dec.&nbsp; It is published electronically via the journal website. ISSN (Print) 1829-8346 ISSN (Online) 2502-5988</p> en-US [email protected] (Indra Purnama) [email protected] (Indra Purnama) Wed, 02 Aug 2023 00:00:00 +0000 OJS http://blogs.law.harvard.edu/tech/rss 60 Enhancing soil and pakcoy (Brassica rapa subsp. Chinensis) nutrient content: investigating the effects of chicken manure compost and bioactivator combinations on various doses http://journal.unilak.ac.id/index.php/jip/article/view/12176 <p>Chicken manure compost serves as a valuable source of organic fertilizer. This study aimed to investigate the effects of different combinations of chicken manure compost and bioactivators on soil and plant nutrient content. Additionally, it sought to examine the relationship between fertilizer dosage and soil and plant nutrient levels, as well as determine the optimal treatment combination of chicken manure compost and bioactivator variations at different doses. In this study, the plant used was pakcoy. The study utilized a randomized group design with two factors. The first factor involved different compost types: A1 (chicken manure compost), A2 (chicken manure compost + N21 bioactivator), and A3 (chicken manure compost + local microorganism (MOL) solutions from banana weevil). The second factor encompassed varying doses of organic fertilizer, 5, 10, 15, and 20 tons ha<sup>-1</sup>, respectively for D1-D4. The findings revealed that composting chicken manure with different bioactivators and doses led to increased soil nutrient levels and noticeable effects on plant nutrient content. However, no interaction was observed among the combined treatments. The treatment combination of chicken manure compost and MOL solutions from banana weevil yielded the highest average plant nutrient content. Applying chicken manure compost with different bioactivators and doses influenced soil nutrient levels.</p> Trisia Wulantika, Yun Sondang, Rina Alfina, Ngakumalem Sembiring, Sentot Wahono, Wiwik Hardaningsih, Yefriwati, Ritawati, Febria Fitri Copyright (c) 2023 Jurnal Ilmiah Pertanian https://creativecommons.org/licenses/by/4.0 http://journal.unilak.ac.id/index.php/jip/article/view/12176 Wed, 02 Aug 2023 00:00:00 +0000 Influence of green manure (Leucaena leucocephala) dosages on eggplant (Solanum melongena) growth and yield across diverse soil types http://journal.unilak.ac.id/index.php/jip/article/view/13547 <p>Eggplant cultivation displays versatility across various soil types. However, nutrient depletion, a result of excessive chemical fertilizer utilization, presents a growing concern. The integration of green manure into agricultural practices, catering to diverse soil types, can remediate this nutrient loss. The purpose of this study was to investigate eggplant growth and yield responses to differing green manure quantities across varying soil types. Employing a factorial experimental method, this research was structured in a completely randomized design (CRD). Two independent variables were evaluated: green manure dosage, with three levels (30 g/plant (D1), 60 g/plant (D2), 90 g/plant (D3)), and soil type, also classified into three categories: Latosol (T1), Grumusol (T2), and Regosol (T3). Data interpretation was conducted using analysis of variance, followed by the Tukey test, each executed at α = 5% significance level. Outcomes indicated a notable interaction between green manure dosage and soil type concerning the leaf area and root fresh weight parameters. The optimal combination emerged as a 30 g/plant green manure dosage applied to Regosol soil type. Notably, individual treatments exerted divergent effects on eggplant growth parameters, though no significant impact on eggplant yield parameters was observed. This research underscores the interplay between green manure usage and soil type in cultivating eggplants, adding value to sustainable agricultural practices.</p> <p>&nbsp;</p> Anggit Kurniawan, Titin Setyorini, Valensi Kautsar Copyright (c) 2023 Jurnal Ilmiah Pertanian https://creativecommons.org/licenses/by/4.0 http://journal.unilak.ac.id/index.php/jip/article/view/13547 Fri, 04 Aug 2023 00:00:00 +0000 Boosting strawberry yield and fruit sweetness with humic substances and biofertilizer in soilless cocopeat-based culture http://journal.unilak.ac.id/index.php/jip/article/view/13242 <p>Farmers usually apply more chemical fertilizers to enhance the yield of strawberries in soilless culture. Humic substances and biofertilizers are now considered essential nutrient sources in sustainable agriculture. The objective of the greenhouse experiment was to observe the effect of humic and fulvic acid (humic substances), and biofertilizer on root growth, nitrogen (N) and phosphor (P) of the growing media, populations of N-fixing and P-solubilizing bacteria in the root zone, and yield of strawberry grown in the cocopeat-based substrate. The experiment was set up in a randomized block design consisting of seven treatments and four replications. The treatments included humic acid, fulvic acid, and biofertilizer in single or combined applications. All data were subjected to analysis of variance and followed by Duncan's Multiple Range Test with p&lt;0.05. All treatments received 50% of the recommended dose of NPK fertilizer. The results showed that all treatments did not affect root length and dry weight. Mixed application of humic substances and biofertilizer together with NPK fertilizer increased total N and P as well as the population of N-fixing bacteria in the growth substrate. Still, P-solubilizing bacteria did not grow in the cocopeat-based substrate. Moreover, mixing humic substances and biofertilizer increased strawberries' fruit yield and sweetness levels.</p> Reginawanti Hindersah, Ratna Ayu Permata Aini, Mieke Rochimi Setiawati, Tualar Simarmata, Diky Indrawibawa, Masako Akutsu Copyright (c) 2023 Jurnal Ilmiah Pertanian https://creativecommons.org/licenses/by/4.0 http://journal.unilak.ac.id/index.php/jip/article/view/13242 Sat, 05 Aug 2023 12:54:45 +0000