Agrosystems, Geosciences & Environment最新文献

{"title":"Effects of land uses and slope gradients on soil physicochemical properties in Woynwha watershed, Northwest Ethiopia","authors":"Workineh Ejigu Mesfin,&nbsp;Degitu Wassie,&nbsp;Temesgen Gashaw Tarkegn,&nbsp;Yihenew G. Selassie,&nbsp;Eyayu Molla","doi":"10.1002/agg2.70135","DOIUrl":"https://doi.org/10.1002/agg2.70135","url":null,"abstract":"<p>Soil quality degradation has become a major problem that results in low agricultural productivity and increasing food insecurity in sub-Saharan Africa. Improving our understanding of how different land uses and slope positions affect soil properties is critical for developing best land management practices. The objective of this study was to examine effects of land uses and slope gradients on physicochemical properties of the soil in the Woynwha watershed, Northwest Ethiopia. Composite soil samples were collected from 0- to 20-cm depth in three major land uses (natural forest, cultivated, and grazing lands) and three slope positions (upper, middle, and lower) with three replications using an auger. In addition, undisturbed soil samples were collected using a core sampler for bulk density analysis. The collected soil samples were analyzed following standard procedures. The variation in soil properties among land uses and slope positions on soil properties was determined using analysis of variance. Means comparison was performed using the least significant difference test at a 5% significance level. The results revealed that land use types and slope gradients showed statistically significant (<i>p</i> &lt; 0.01) differences in sand, silt, clay, bulk density, pH, available phosphorus (Av P), total nitrogen (TN), organic carbon (OC), cation exchange capacity (CEC), and exchangeable bases of the studied soil. The highest mean values of bulk density (1.64 g cm⁻³) and lowest total porosity (37.67%) were measured under grazing lands at steeper slopes. On the other hand, the highest total porosity (64.30%), clay (59.33%), silt (21.33%), soil pH (6.62), OC (3.58%), TN (0.32%), CEC (51.20 cmol_c kg⁻¹), Ca²⁺ (11.27), Mg²⁺ (2.50), K⁺ (1.63), and Na⁺ (0.43 cmol_c kg⁻¹) were observed in the lower slopes of natural forest. The highest (6.0 mg kg⁻¹) and lowest (2.33 mg kg⁻¹) contents of Av P were recorded in croplands of lower slopes and grazing lands of upper slopes, respectively. Hence, we conclude that integrated nutrient management and sound land use planning should be implemented for improving soil fertility and crop productivity in the study area and others having similar environment. However, soil properties variability under different depths and agroecologies needs to be examined through further research.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70135","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144214166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distribution and association of factors affecting onion purple blotch disease epidemics in northwestern Ethiopia","authors":"Mitku Bitew,&nbsp;Getnet Yitayih,&nbsp;Girmay Aragaw","doi":"10.1002/agg2.70144","DOIUrl":"https://doi.org/10.1002/agg2.70144","url":null,"abstract":"<p>Onion (<i>Allium cepa</i> L.) is an important food bulb crop used for various dishes and medical purposes. However, purple blotch disease limits productivity and production of onion in onion-growing regions. Thus, this research was conducted to assess the distribution and intensity of purple blotch of onion and determine the associations of disease parameters with biophysical factors. A total of 130 onion fields from four districts in two zones were surveyed during the 2022/23 cropping season to measure disease and biophysical data during the survey periods. The associations of disease parameters and biophysical factors were analyzed using the binary logistic regression model by employing the SAS GENEMODE procedure. The survey results confirmed 100% prevalence of purple blotch. The highest disease incidence and severity were assessed from Gondar Zuria (37.13% and 23.01%) and Libokemkem (36.24% and 21.34%) districts, respectively. High disease incidence (&gt;45%) and severity (&gt;25%) were strongly associated with bulbing and maturity crop growth stages, field size (&gt;0.25 ha), blub previous crop, late October transplanting, more than six times fungicide application, and less than four times land preparation. Lower disease incidence (≤45%) and severity (≤25%) had a strong association with early December transplanting, more than four times land preparation, fungicide spray (≤6 times), field size (≤0.25 ha), and fields previously planted with cereals. Thus, these practices could be considered management options to reduce the impact of the disease in onion-growing areas in northwestern Ethiopia and other similar areas of the country. Future research on pathogenic variability is required to develop long-term disease management strategies.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70144","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144214167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Genetic variation, genotypic and phenotypic correlation, heritability, and path coefficient analysis of yield and yield-related traits in bread wheat (Triticum aestivum L.) varieties at Gitilo Dale, Western Ethiopia","authors":"Morketa Gudeta,&nbsp;Bulti Tesso,&nbsp;Negash Geleta","doi":"10.1002/agg2.70115","DOIUrl":"https://doi.org/10.1002/agg2.70115","url":null,"abstract":"<p>The experiment was conducted at Gitilo Dale, Western Ethiopia, with the objectives to determine the extent of genetic variability, the association of traits, heritability, and their direct and indirect associations with grain yield and yield components under rainfall conditions. Twenty-five bread wheat (<i>Triticum aestivum</i> L.) varieties were arranged in a randomized complete block design, and data were collected for 14 agro-morphological traits. The results from the analysis of variance showed that varieties were highly significantly different for 14 traits. The mean ranges were higher for biological yield, grain yield, days to maturity, plant height, days to heading, hectoliter weight, and 1000-kernel weight in decreasing order of importance. High estimates for genotypic and phenotypic coefficients of variation (&gt;20%) were observed for grain yield, biological yield, and harvest index. Higher (&gt;60%) estimates of heritability values coupled with genetic advance as a percentage of the mean were observed for grain yield, biological yield, and harvest index. At the genotypic level, biological yield, harvest index, productive tillers per plant, kernels per spike, and spikelets per spike exerted positive direct effects and significant and positive associations with grain yield. Similarly, at the phenotypic level, biological yield, harvest index, total tillers per plant, productive tillers per plant, kernels per spike, spikelets per spike, and spike length exerted positive direct effects and significant positive associations with grain yield, indicating they are the most important traits for indirect selection of varieties for higher grain yield improvement. The four top-performing bread wheat varieties identified in the study were <i>Liban</i>, <i>Shorima</i>, <i>Abola</i>, and <i>Taye</i>. Future research should be done over locations and years by including more bread wheat genotypes to investigate the extent of genetic variability and traits associations with grain yield and other yield components to enhance the yield of bread wheat.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70115","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144191099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Response of floral hemp production to fertilizer nitrogen and phosphorus rates","authors":"Tina Sullivan,&nbsp;Matt Yost,&nbsp;Dakota Boren,&nbsp;Earl Creech,&nbsp;Grant Cardon,&nbsp;Bruce Bugbee","doi":"10.1002/agg2.70124","DOIUrl":"https://doi.org/10.1002/agg2.70124","url":null,"abstract":"<p>Few studies have evaluated the fertilizer requirements of floral hemp (<i>Cannabis sativa</i> L.). When hemp production was first legalized in Utah in 2019, many growers had questions about fertilizer requirements. Some crop consultants were advising growers that hemp required extremely high N and P rates for optimal production. The objective of this study was to evaluate N and P requirements of outdoor irrigated floral hemp production in the Intermountain West. A field study was established in 2020 near Logan, UT, replicated in 2021, and expanded in 2022. In 2020–2021, three treatments included a control (university fertilizer guidelines for corn [<i>Zea mays</i> L.] given no reference for hemp) and 112 kg N ha⁻¹ or 112 kg P₂O₅ ha⁻¹ above the control. The 2022 trial was expanded to include five fertilizer N levels, four fertilizer P levels, and a nonfertilized control. Female Trump hemp clones were transplanted in late May and harvested in September and October in all years. The results from 2020–2021 showed no harvest index (leaf and flower biomass: total aboveground biomass), biomass yield, stem yield, and cannabinoid concentration increases due to N or P above the recommended rates for corn. The results from 2022 were similar, and the nonfertilized control had the same oil and floral yield as all fertilized treatments. Collective interpretation indicates that hemp does not require more applied inorganic N or P than recommendations for corn and that fertilizer responsiveness may be limited. Further, excessively high N and P fertilizer rates should not be recommended for outdoor hemp.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70124","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144179240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of agro-ecological zones on soil phosphorus fractions in central Nepal","authors":"Dinesh Khadka,&nbsp;Keshab Raj Pande,&nbsp;Bhaba Prasad Tripathi,&nbsp;Roshan Man Bajracharya","doi":"10.1002/agg2.70141","DOIUrl":"https://doi.org/10.1002/agg2.70141","url":null,"abstract":"<p>Soil plays a pivotal role as the primary repository of phosphorus (P) in terrestrial ecosystems. Sequential fractionation, a widely employed technique, is applied to provide comprehensive insights into the properties and behavior of P within soil systems. Despite this, a knowledge gap persists regarding the distinct P pools existing in Nepalese soils. This study, therefore, aimed to explore how agro-ecological zones influence the soil P fractions in central Nepal. A total of 225 soil samples were collected, with an even distribution of 75 samples from each zone encompassing the high-hills, mid-hills, and Terai plains across diverse locations in central Nepal. The sequential fractionation method was employed to characterize the P pools in the soils. The results indicated significant differences in the soil parameters across agro-ecological zones, including soil pH, organic matter, texture, available P (Olsen P, Bray-1 P, and Mehlich-3 P), inorganic P fractions (loosely bound P, aluminum-bound P, iron-bound P, reductant soluble P, and calcium-bound P), organic P fractions (labile P, moderately labile P, fulvic acid P, humic acid P [HA-Po], and non-labile P), as well as residual P and total P. The mid-hills exhibit higher levels of most P fractions, followed by the high-hills and Terai. In the high-hills and Terai, HA-Po was identified as a primary reservoir of total P, while in the mid-hills, residual P dominates. The long-term indigenous P supplying capacity follows a decreasing order: mid-hills &gt; high-hills &gt; Terai. The adoption of indigenous P-releasing practices is beneficial in the mid-hills. The Terai soil, characterized by high P mining, necessitates more critical P management than other zones. Overall, this study offers important insights into how the diversity of agro-ecological zones affects P fractions, which can help guide the development of more effective soil P management practices for sustainable agriculture.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70141","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144179239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Genetic diversity among black cumin (Nigella sativa L.) accessions based on quantitative and qualitative traits","authors":"Solomon Kassaye Ejigu,&nbsp;Wosene Gebreselassie Abtew,&nbsp;Ermias Lulekal Molla","doi":"10.1002/agg2.70106","DOIUrl":"https://doi.org/10.1002/agg2.70106","url":null,"abstract":"<p>To investigate the genetic diversity in black cumin (<i>Nigella sativa</i> L.), a total of 64 genotypes were tested in an 8 × 8 simple lattice design at Sirinika Agricultural Research Center for two consecutive years during 2022/2023 and 2023/2024. Analysis of variance revealed the presence of significant difference among the genotypes for all quantitative traits except capsule length and diameter. The variation of the genotypes for seed yield was between 0.66 and 1.69 t ha⁻¹ with a mean of 1.02 t ha⁻¹. The genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) for 16 traits are estimated in the range between 3.81% and 49.84% and 6.50% and 50.90%, respectively. <i>H</i>² and advance as percentage of mean (GAM) ranged from 19.18 to 98.25 and 4.67% and 100.70%, respectively. High to moderate estimates of GCV, PCV, <i>H</i>², and GAM were observed for all parameters except days to bud formation, days to maturity, capsule length, and capsule diameter. Seed yield showed positive and significant correlation with almost all parameters. The first five PCAs accounted for 72% of the total variability, in which PCA1 contributed 32% and PCA2, PCA3, PCA4, and PCA5 exhibited 13%, 12%, 8%, and 7% contributions to the total variability, respectively. The qualitative data showed high variability except flower color, plant growth type, and stem hairiness. The cluster analysis for qualitative traits was classified into five groups. The research results clearly showed that there was sufficient diversity among the genotypes, which can be exploited for the future black cumin improvement program.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70106","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144171533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impacts of farming management on soil health and water quality in Kentucky","authors":"Sandeep Airee,&nbsp;Atanu Mukherjee","doi":"10.1002/agg2.70134","DOIUrl":"https://doi.org/10.1002/agg2.70134","url":null,"abstract":"<p>Use of synthetic chemicals for crop production negatively impacts soil and water quality in Kentucky, including eutrophication and water pollution. However, field research data on these aspects in Kentucky are scarce, and the main challenges in conducting field or on-farm research include lack of different farming management under the same farmland and lack of willingness of the regional farmers to take part in the research studies. This qualitative review aims to compare the effects of various nutrient sources on water quality and soil health in Kentucky. Survey data indicate that in Kentucky, intensive agricultural practices, including heavy machinery and chemical fertilizers, contribute to soil degradation and adversely impact water quality. The state's agricultural landscape, dominated by small family farms, influences localized water quality impacts, highlighting the need for sustainable farming practices. Kentucky's agricultural practices show a significant shift toward reduced tillage and increased manure usage from 2017 to 2022. However, the preliminary source of nutrients remains the usage of fertilizers while very little farm-scale research data on leaching and surface runoff exist. Limited research shows manure application relates to elevated levels of nitrate, phosphate, and ammonium in water. Scarcity of data, including the absence of on-farm relevant studies, hinders comprehensive insights into profitability, adoption barriers, and socioeconomic impacts that are crucial for promoting effective sustainable agriculture in Kentucky and remains a significant knowledge gap.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70134","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144171269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determining a water budget for an established tailwater recovery system in the Mississippi Alluvial Plain","authors":"Amanda M. Nelson,&nbsp;Paul Rodrigue,&nbsp;Matthew T. Moore,&nbsp;Christopher D. Delhom","doi":"10.1002/agg2.70137","DOIUrl":"https://doi.org/10.1002/agg2.70137","url":null,"abstract":"<p>In the Mississippi Alluvial Plain, also known as the Delta, tailwater recovery (TWR) on-farm storage (OFS) systems are a best management practice to address both water quality and quantity issues. TWR/OFSs are surface water capture and irrigation reuse systems, consisting of a ditch to capture surface water and often a reservoir to store captured water and pumps to move surface water from the ditch into either an OFS reservoir or to irrigate nearby fields. To determine if established TWR systems are an effective way to reduce groundwater use, a ditch-only TWR system in Sunflower County, MS was equipped with velocity and flow meters, water level loggers, and rain gauges. The objective of this study was to determine a fully measured water budget for an older TWR system. This study found 22% of the total applied irrigated water over two growing seasons was from the collected tailwater runoff. During the 2023 growing season, only 15.5% of the input water was lost from the system through the outflow pipe, indicating that 84.5% of the input water (precipitation plus irrigation) during the growing season was retained in the soil, utilized for plant growth, or was recirculated in the TWR. After a decade of use, the studied TWR system is meeting its dual purpose of reducing groundwater pumping and enhancing residence times, which could have water quality and hydrologic benefits.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70137","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144171240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrating cover crops and targeted herbicide applications in cotton production","authors":"Tristen H. Avent,&nbsp;Jason K. Norsworthy,&nbsp;Thomas R. Butts,&nbsp;Gerson Drescher","doi":"10.1002/agg2.70132","DOIUrl":"https://doi.org/10.1002/agg2.70132","url":null,"abstract":"<p>Cover crops are part of integrated weed control management to help mitigate herbicide resistance evolution. Targeted sprays from the John Deere See &amp; Spray are currently not recommended in cover crops. Experiments were conducted yearly from 2022 to 2024 in Keiser, AR, to evaluate targeted applications (TAs) with cover crops in cotton (<i>Gossypium hirsutum</i> L.). Treatments assessed the main effect of winter cover crop (fallow, cereal rye [<i>Secale cereale</i> L.], or hairy vetch [<i>Vicia villosa</i> Roth]), herbicide application methods (nontreated, broadcast [BC], TA + BC residuals [TA + BCRs], or TA only), and the interaction on cotton tolerance, weed control, and herbicide savings. Cereal rye generally aided weed control efforts across the weeds evaluated, and there were instances of herbicide savings at the preemergence and mid-postemergence (MPOST) timings when using TA or TA + BCR relative to BC. In some instances, TA POST + RES reduced weed control. At layby, TA-only applications reduced Palmer amaranth control by 5–10 percentage points in winter fallow systems compared to the BC in 2022 and 2023. In 2024 at MPOST, low herbicide savings occurred in the winter fallow cover systems (2.9%), whereas TA + BCR saved 29.4% and 26.5% for cereal rye and hairy vetch, respectively. In conclusion, See &amp; Spray improved environmental stewardship and could detect and treat weeds in standing cover crop biomass, providing comparable control to the BC application at the end of the season (≥92% for all species).</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70132","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144171268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling rice leaf area index and canopy height in the US Mid-South region","authors":"Ellie Kuhn,&nbsp;Beatriz Moreno-García,&nbsp;Michele L. Reba,&nbsp;Kusum Naithani,&nbsp;Benjamin R. K. Runkle","doi":"10.1002/agg2.70139","DOIUrl":"https://doi.org/10.1002/agg2.70139","url":null,"abstract":"<p>Crop growth modeling plays a critical role in addressing the global challenges of food scarcity, carbon cycling, and water management. By simulating crop development from environmental factors, these models help predict harvest yield and carbon or water cycle terms and thus can inform policy and investment decisions. However, for some agricultural regions, such as the US Mid-South, there is a lack of comprehensive data specific to rice (<i>Oryza sativa</i>) cultivars and their growing conditions. Here, we use 30 field seasons of observational data to predict leaf area index (LAI) and canopy height (H_can), key inputs for crop growth models, for numerous rice cultivars grown under different conditions in east-central Arkansas. Our results show that a peaked response to the accumulated growing degree day (LAI: <i>R</i>²= 0.83, root mean square error (RMSE) = 0.97 m² m⁻²; H_can: <i>R</i>²= 0.90, RMSE = 10.9 cm) is a better functional form than one without temperature information, that is, driven only by days after planting (LAI: <i>R</i>²= 0.73, RMSE = 1.22 m² m⁻²; H_can: <i>R</i>²= 0.83, RMSE = 14.5 cm). Additionally, predictions from a cultivar-agnostic model are comparable to the predictions from cultivar-specific models, suggesting that the broader cultivar-agnostic model is sufficient and can be widely applied to rice production systems in this region. Such a generalized model can support yield prediction efforts, disentangle carbon cycle terms, or be used for crop stress detection.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70139","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}