Judul: Quality Losses Of Rice Due To Delay In Harvesting And The Use Of Differensial Drying Method (Case Study In Wajo District South Sulawesi)
Abstrak: Delay the harvest are often done by farmers in Wajo, South Sulawesi. It is caused by the lack of manpower and climate change. Delay the harvest can cause quality and quantity loss of grain. The longer of delay harvest resulting a decreased percentage of head grains, increased of broken grains, groats and damage grains. Sun drying after threshing is a hereditary habit of the farmers in Wajo. The objective of this study were to : (1) analyze the effect of delay in harvesting followed by threshing on rice quality losses, (2) analyze the effect of drying with lamporan and tarpaulin on rice quality losses, (3) measure the quality of rice Ciliwung varieties produced, and (4) calculate the economic value added of rice Ciliwung varieties. This study was carried out in Wajo district South Sulawesi, varieties of Ciliwung was selected as sample of rice. The results showed the percentage of damaged and yellow grains without delay (P0) were 2.25 and 0.27%, delayed 3 days (P1) were 5.8 and 0.77%, delayed 6 days (P2) were 6.95 and 1.03%, and delayed 10 days (P3) were 13.25 and 1.48%. The results of quality loss analysis of head grains with 3 days delayed (P1) was 1.29%, 6 days delayed (P2) was 2.82%, and 10 days delayed (P3) was 5.56%. These results showed that the lowest quality loss of head grains 1.76% was drying on lamporan and 3 days delayed (A1P1), while the highest 6.33% on was drying lamporan and 10 days delayed (A1P3). The rice quality measurement of Ciliwung varieties from Wajo district of South Sulawesi was categorized in III, IV and V of rice quality standard based on SNI No. 01-6128-2008. The ratio of value added in postharvest handling of this research was categorized in intermediate economic value added (16 to 40%) and low<15%. The ratio of each treatment were 16.85, 15.13, 10.51, and 7.84%.
Keyword: delay harvesting, grain drying, rice quality, value added

Judul: Rice Yield Loss at Harvesting to Threshing Stages in Darma  District, Kuningan Regency, West Java
Abstrak: Padi merupakan komoditas yang penting karena sebagai sumber utama pemenuhan kebutuhan energi. Kehilangan hasil yang disebabkan oleh teknis penanganan panen dan pascapanen yang tidak tepat dapat mengurangi hasil produksi padi dan menyebabkan kerugian besar bagi petani. Analisis kehilangan hasil padi perlu dilakukan untuk menekan kehilangan hasil. Penelitian ini bertujuan menganalisis kehilangan hasil dari tahapan pemanenan hingga perontokan di Kecamatan Darma, Kabupaten Kuningan. Penelitian dilaksanakan pada bulan Januari 2024 di lahan sawah yang berada di Desa Darma dan Desa Karanganyar, Kecamatan Darma, Kabupaten Kuningan. Pengukuran kehilangan hasil padi dilakukan dengan membandingkan produksi gabah yang diperoleh antara petak kontrol dengan petak perlakuan. Petak kontrol berukuran 2,5 m x 2,5 m sebanyak lima petak yang terletak di dalam petak perlakuan yang berukuran 25 m x 25 m. Pemanenan hingga perontokan padi pada petak kontrol dilakukan secara teliti dan hati-hati untuk menghindari kehilangan hasil. Pemanenan hingga perontokan padi pada petak perlakuan dilakukan sesuai dengan metode dan kebiasaan petani setempat. Kehilangan hasil padi di Kecamatan Darma sebesar 4,88% lebih rendah dan berbeda nyata dengan kehilangan hasil padi nasional tahun 2014 sebesar 16,47%. Kehilangan hasil padi di Desa Darma sebesar 3,49% lebih rendah dan berbeda nyata dengan kehilangan hasil padi di Desa Karanganyar sebesar 6,29%., Rice is an important commodity because it is the main source of meeting energy needs. Yield losses caused by improper harvest and post-harvest handling techniques can reduce rice production and cause huge losses for farmers. Analysis of rice yield loss needs to be done to reduce yield loss. This research aims to analyze yield loss from harvesting to threshing stages in Darma District, Kuningan Regency. The research was conducted in January 2024 in paddy fields located in Darma Village and Karanganyar Village, Darma District, Kuningan Regency. Measurement of rice yield loss was carried out by comparing grain production obtained between control plots and treatment plots. The control plots were 2.5 m x 2.5 m in size as many as five plots located inside the treatment plots which were 25 m x 25 m in size. Harvesting to threshing of rice in the control plots was done carefully and cautiously to avoid yield loss. Harvesting to threshing of rice in the treatment plots was done according to the methods and habits of local farmers. Rice yield loss in Darma Sub-district of 4.88% was lower and significantly different from the national rice yield loss in 2014 of 16.47%. Rice yield loss in Darma Village was 3.49% lower and significantly different from rice yield loss in Karanganyar Village at 6.29%.
Keyword: Ciherang, pascapanen, Intani

Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology