Feronia limoni (Wood-apple) is one of the most researched plants containing bioactive compounds that have biological activity. So far, research on chemical compounds and fruit activity of F. limoni is often carried out using laboratory analysis, such as chromatographic analysis. This study aimed to assess the ability of NIRS to predict organic compounds contained in F. limoni based on its spectrum. Intact F. limoni samples were obtained from five different geographical origins in Aceh Province. Spectra data in form of absorbance spectrum were acquired using a portable sensing device NIRS instrument PSD FTNIRS i16 in wavenumbers 4000-10000 cm-1 or in the wavelength range from 1000 to 2500 nm with resolution windows of 0.02 nm and optical gain 4x. The results showed that NIRS was able to classify F. limoni samples based on geographical origins with the maximum explained variance of two PCs is 93%. Moreover, the respective wavelength related to this classification is 1090, 1270,1390, 1459, 1602,1713, 1912, and 2211 nm which corresponds to C-H, O-H, C-H-O, N-H stretching. It is related to acids, carbohydrates, and the fibre content of F. limoni samples from bent and stretched along the near-infrared region.

Climate change that occurs globally in agriculture causes fail crops production, causing losses for farmers. This loss can be minimized by using rice straw mulch to reduce soil temperature and protect the soil from direct solar radiation on lettuce land. This study will examine whether treatment with rice straw mulch can affect soil temperature in lettuce land. The research was conducted at Nudira Fresh Green House PT. Nudira Sumber Daya Indonesia, Warnasari Village, Pangalengan Subdistrict, Bandung District, West Java. This research was conducted from March 1, 2022 to August 31, 2022. The data of this study used a factorial 4 x 2 Randomized Block Design with 3 replications. Factor I was the thickness of rice straw mulch 0 t ha− 1 (R0), 4 t ha−1 or 0.48 kg plot−1 (R1), 6 t ha−1 or 0.72 kg plot−1 (R2), and 8 t ha−1 or 0.96 kg plot−1 (R3) and factor II was the dose of cow manure (F1) and compost (F2) each 20 t ha−1 or 2.4 kg plot−1. The results showed that the application of rice straw mulch with the organic fertilizer has not significant effect on soil temperature in lettuce land. However, the application of rice straw mulch at a dose of 8 t ha−1 slightly better results in decreasing soil surface temperature at a depth of 0 cm, although not significantly different.

As the largest maritime country globally, Indonesia has a variety of potential marine biota that can be explored as a source of nutrition and raw materials for medicine. As one of the marine biota, Sea cucumbers have been widely recognized by the public as a medicine for treatment from generation to generation. With the breadth and variation of Indonesian waters’ characteristics, it is possible to have differences in the nutritional and bioactive content of various types and sources of sea cucumber. This study analyzes the compounds in Holothuria atra, and Holothuria scabra dried sea cucumbers using Near-Infrared Spectroscopy (NIRS). Spectrum data of dried sea cucumber samples were obtained from the absorbance spectrum in the wavelength range of 780 nm - 2500 nm with a resolution of 0.02 nm and 32 scans. The spectrum data is then projected onto principal component analysis (PCA) to extract data and observe similarities between the two samples. The results showed that there was no difference between the Holothuria atra and Holothuria scabra dry samples in terms of the spectral data showing their molecular bonds. However, the essential chemical structure related to the content of sea cucumbers is vibrating in the Near-infrared region, especially in the waves 1147, 1310, 1452, 1667, 1819, 1920, and 2235 nm, indicates the presence of molecular bonds C-H, O-H, C-O, C-H-O, N-H, and S-H. Based on the results obtained, it can be concluded that NIRS has the potential to analyze and determine several quality attributes of sea cucumber samples with further calibration modeling.

Lettuce is one of the most popular horticultural crops. It is necessary to make an effort to increase lettuce production to meet market demand. One of the efforts is engineering cultivation systems through rice straw mulch and organic fertilizers application. The aims of studied to determine the effect of rice straw mulch and organic fertilizer on growth and production of lettuce. The research was conducted at Nudira Fresh Green House, PT. Nudira Sumber Daya Indonesia, Warnasari Village, Pangalengan Subdistrict, Bandung District, West Java. This study used factorial randomized block design with 3 replications. There were 2 factors with 8 treatment combinations. Factor I was mulch dose: control, 4 t ha−1 rice straw mulch, 6 t ha−1 rice straw mulch, 8 t ha−1 rice straw mulch. Factor II was organic fertilizer types: 20 t ha−1 cow manure, and 20 t ha−1 compost. The results showed that the rice straw mulch dose and organic fertilizer type did not significantly effect on plant height, leaves number, production per plant sample, and production per plant plot. Application of 8 t ha−1 rice straw mulch was able to increase plant height, production per plant sample, and production per plant plot. The cow manure application was able to increase plant height, leaves number, production per plant plot, and production per plant sample compared to using compost.