The environment is the main factor affecting variations in phytochemicals and antioxidant activity in rice. The objective of this study was to evaluate the stability of grain yield, phytochemicals and antioxidant capacity of six rice genotypes. Six rice genotypes were evaluated in a randomized complete block design with three replicates at three locations in Trat, Bangkok and Sakon Nakhon provinces in July–October 2019. Data on grain yield, yield components, total phenolic content, ferulic acid and antioxidant capacity were recorded. Grain yield was highest for crops grown in Bangkok, whereas antioxidant activity was highest for crops grown in Bangkok and Sakon Nakhon. Hom Nang Nual 1 and Mali Nil Boran had the highest grain yield. Riceberry had the highest grain yield in Trat; it also had high levels of total phenolic compounds, ferulic acid and antioxidant activity. Mali Nil Boran, Mali Nil Surin and Riceberry had the most stable total phenolic content, ferulic acid and antioxidant activity, respectively. Information on the levels and variability of phytochemicals in rice enables the selection of genotypes with high and stabile phytochemicals for production and rice breeding.

Mid-season drought is increasingly recognized as a major constraint on tuber production in Jerusalem artichoke. The ability of different genotypes to maintain high yields under such conditions is a critical component of drought tolerance. This study aimed to investigate the effects of mid-season drought on tuber yield, biomass, harvest index, tuber water-use efficiency (WUEt), and biomass water-use efficiency (WUEb) across various Jerusalem artichoke genotypes with differing levels of drought tolerance. The experiment was conducted in pots using a 2 × 5 factorial combination in a randomized complete block design with four replications over two years. Factor A consisted of two water regimes: field capacity (FC) and mid-season drought. Factor B included five genotypes: JA 3, JA 125, JA 15, JA 89, and CN 52867. Mid-season drought significantly reduced tuber dry weight, biomass, WUEt, and WUEb, while increasing the harvest index. Significant differences were observed among genotypes for tuber dry weight, biomass, harvest index, WUEt, and WUEb under both water regimes. CN 52867 and JA 89 were characterized as drought-tolerant genotypes with high water-use efficiency and high yield potential. JA 3 was also noted for its lower yield reduction under stress. These three genotypes serve as valuable genetic resources for breeding programs aimed at developing progeny populations with enhanced yield potential and drought tolerance, particularly for mid-season drought-prone environments.

Sweet potato roots are rich in phytochemicals. The objective of this study was to evaluate the stability of number of storage roots, storage root dry weight, harvest index and anthocyanin and carotenoid contents of 10 sweet potato genotypes. Ten sweet potato genotypes were evaluated in a randomised complete block design with three replications at three locations in Surin province, including Rajamangala University of Technology Isan (RMUTI), Chomphra district and Sanom district during November 2022 to March 2023. Results indicated that the environment significantly influenced most traits, except for carotenoid content. Genotypes and genotype-environment interactions were significant for all traits. Number of storage roots was highest in genotypes found in RMUTI. Storage root yield and anthocyanin content was highest in genotypes found in Chomphra district, while harvest index and carotenoid content were highest in genotypes found in Sanom district. SR 2022/03 had the highest storage root yield across locations and in Chomphra district. KS 2022/07 had the highest harvest index and anthocyanin content across locations. SR 2022/10 had the highest anthocyanin content at RMUTI and also had the highest carotenoid content across locations. KS 2022/07 had the most stable storage root yield. SR 2022/01 had the most stable anthocyanin and carotenoid contents. Information on the levels and variability of phytochemicals in sweet potato enables breeders to select sweet potato genotypes with high and stable phytochemicals for sweet potato breeding.

Analyzing Success Factors in Developing Mobile Applications for Farmers in Thailand Using Analytic Hierarchy Process Technique

Sweet potatoes ( Ipomoea batatas L.) are a nutrient‐rich root crop with substantial nutritional, economic, and environmental benefits. This study assessed nine sweet potato genotypes across three distinct locations in Thailand to evaluate yield potential, adaptability, and environmental influences. Trials used a randomized complete block design with four replications. Location 1 (Thatum District) featured sandy soil with moderate pH, high salinity, and balanced nutrients but lower phosphorus (P) and nitrogen (N). Location 2 (Maung District) had sandy, acidic soil but was the most chemically fertile, with high P and potassium (K). Location 3 (Rajamangala University of Technology Isan, Surin Campus) had loamy sand with higher silt content, acidic pH, low P, K, and electrical conductivity (EC). Results highlighted significant yield differences influenced by soil and environmental variability. Genotype SR18003 achieved the highest yield and harvest index, demonstrating strong adaptability and commercial potential. Strong correlations between storage root traits (number, size, and weight) indicate their usefulness for selection. The study underscores the importance of tailored soil management and location‐specific genotypes in optimizing sweet potato production, contributing to resilient varieties, sustainable farming, and improved food security. Further research on genetics and agronomy can enhance breeding and cultivation systems.

This study investigated the photosynthetic, agronomic traits, and yields responses to different nitrogen regimes of sugarcane cv. Suphanburi 50 and examined their relationship with cane yield. Field experiment was conducted during October 2022–October 2023. Four nitrogen regimes, namely, 46.9 (N base), 93.8 (N base + 46.9), 140.7 (N base + 93.8), and 203.2 (N base + 156.3) kg N/ha were studied using a randomized complete block design (RCBD) with four replications in low‐fertility soil. Chlorophyll fluorescence (Fv′/Fm′), net photosynthetic rate (Pn), stomatal conductance (gs), transpiration (E), intercellular CO ₂ (Ci), transpiration efficiency (TE), and agronomic traits were measured at 4, 8, and 12 months after transplanting (MAT). Biomass, cane and juice yields as well as brix were measured at 12 MAT. Applying nitrogen fertilizer at 140.7 and 203.2 kg N/ha significantly increased Fv′/Fm′, Pn, gs, Ci, and TE at 4 and 8 MAT. Applying nitrogen at 203.2 kg N/ha tended to produce higher stalk numbers (6.05 stalks/stool), cane yield (106.3 t/ha), and juice yield (33,856 L/ha); however, these traits as well as brix were not statistically significant among nitrogen regimes. These enhancements were of 15.24%, 11.89%, and 5.82% for stalk numbers, cane yield, and juice yield, respectively, when compared with N base control. Correlation showed that Fv′/Fm′ ( r = 0.55 ^∗ ) and E ( r = 0.49 ^∗ ) positively correlated with cane yield at harvest. Several agronomic traits correlated with cane yield, including tiller number at 4 MAT ( r = 0.51 ^∗ ), and cane height, stalk number, stalk diameter, and green leaves number ( r = 0.41 ^∗ –0.60 ^∗∗ ) at 8 and 12 MAT. This study provides new insights into the physiological and agronomic performance of a juice‐type sugarcane cultivar grown in acidic sandy soils, offering valuable information for optimizing nutrient management and breeding strategies in juice sugarcane production.