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Siti Mutmainah
Widya Gama Mahakam Samarinda
Agriculture, Biological Sciences & Forestry

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Changes In Sub Optimal Soil Nutrient Status By Adding Liquid Organic Fertilizer From Tofu Wastewater And Lemongrass: Perubahan Status Hara Tanah Lahan Sub Optimal Dengan Penambahan Pupuk Organik Cair (Poc) Air Limbah Tahu Dan Serai Wangi Siti Mutmainah
Agrifarm : Jurnal Ilmu Pertanian Vol 9 No 1 (2020): July
Publisher : Universitas Widya Gama Mahakam

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (360.414 KB) | DOI: 10.24903/ajip.v9i1.906

Abstract

This study aims to determine the nutrient levels of Liquid Organic Fertilizer (POC) Wastewater and Lemongrass Wastewater and soil nutrient status sub-optimal land after incubation for 21 days. Sub-optimal land is land that naturally has low productivity, therefore it is necessary to add nutrients in both organic and inorganic fertilizers to change nutrient status in the soil. Organic fertilizer in liquid form is one type of fertilizer that can facilitate the absorption of nutrients. Tofu wastewater has an unpleasant odor, one of the efforts that will be made to reduce the odor is by adding fragrant lemongrass in making liquid organic fertilizer. Based on the results of the study note that the total macro nutrient levels (N + P2O5 + K2O) Liquid Organic Fertilizer Wastewater and Lemongrass Wastewater is 0.17% with a degree of acidity 4.39. Suboptimal soil nutrient status after incubation for 21 days with different concentration treatments namely 10%, 30% and 50% addition of Liquid Organic Fertilizer tofu waste water and lemongrass experience changes in potassium nutrient status at concentrations of 0%, 10 %, 30% and 50%, while the phosphorus changes at concentrations of 30% and 50%, but not nitrogen.
Robusta Coffee Growth Response to Application of Various Liquid Organic Fertilizers in Replacing C-Organic and N-Total Soil Siti Mutmainah
Agrifarm : Jurnal Ilmu Pertanian Vol 9 No 2 (2020): December
Publisher : Universitas Widya Gama Mahakam

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (104.495 KB) | DOI: 10.24903/ajip.v9i2.988

Abstract

The Ministry of Agriculture through the Agricultural Quarantine Agency (2019) stated that Robusta coffee has contributed 41% of the country's foreign exchange, with an average export frequency of 102 times per month, and will continue to increase. In connection with the growth in export volume of robusta coffee, coffee farmers need additional substances for the soil in the form of nutrients to be able to meet the soil nutrient needs for coffee from planting to harvest. Organic fertilizer in liquid form is one type of fertilizer that can be an option, in addition to facilitating nutrient absorption. This study aims to determine the response of various liquid organic fertilizers at certain concentrations to the vegetative growth of robusta coffee. The content of C-organic and total Nitogen in the soil which has been given the addition of gamal liquid organic fertilizer and tofu wastewater with the addition of citronella can provide a very significant difference in the vegetative growth of robusta coffee plants at the age of 60 HSP at plant height, and 90 HSP in diameter. stem and number of leaves (strands). Based on the results of laboratory tests carried out, it was also known that the macro and micro nutrient content in the soil with the addition of poc of tofu wastewater which was given citronella had a good content compared to the control and soil conditions with the addition of gamal liquid organic fertilizer.
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