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Line sowing and deeper rotary tillage improve seedling establishment and wheat yield in rice–wheat rotation 行播和深轮作提高了稻麦轮作的成苗率和小麦产量
IF 2 3区 农林科学
Agronomy Journal Pub Date : 2025-07-25 DOI: 10.1002/agj2.70117
Wenjia Yang, Ruiqi Hao, Jichao Tang, Zhixiang Li, Bilin Lu, Xun Jiang
{"title":"Line sowing and deeper rotary tillage improve seedling establishment and wheat yield in rice–wheat rotation","authors":"Wenjia Yang,&nbsp;Ruiqi Hao,&nbsp;Jichao Tang,&nbsp;Zhixiang Li,&nbsp;Bilin Lu,&nbsp;Xun Jiang","doi":"10.1002/agj2.70117","DOIUrl":"https://doi.org/10.1002/agj2.70117","url":null,"abstract":"<p>Wheat (<i>Triticum aestivum</i> L.) yield is primarily limited by puddled and wet soil under the rice–wheat rotation system. This study was conducted to determine whether seedling establishment of wheat could be improved through adjusting sowing and tillage methods. The effects of broadcast or line sowing and shallow or deeper rotary tillage on the wheat seed distribution and germination in different soil layers, the variations of soil water content, and wheat growth characteristics were investigated at the Yangtze River basin, China. The results showed that compared to broadcast sowing, the seed germination rate of line sowing was increased by 5%–7% due to the more vertically uniform distribution of seeds in the 0- to 15-cm soil layer; furthermore, tiller number, aboveground biomass, leaf area index, relative leaf chlorophyll content, and root number were significantly higher under line sowing. Consequently, the wheat yield obtained using line sowing significantly increased by 9%–13% compared to using broadcast sowing. Compared to shallow rotary, deeper rotary not only improved the above values but also decreased soil water content by 5%–11% in 0- to 20-cm soil layers at the seedling stage, which was beneficial to the emergence of post-rice wheat seeds. The wheat yield under deeper rotary was 5%–12% higher than under shallow rotary. Among all treatments, the best performance of seed distribution and germination, wheat growth, and yield was observed for the combination of line sowing and shallow rotary. Therefore, it can be considered a favorable practice to improve seedling establishment and wheat growth in the rice–wheat rotation system.</p>","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144705539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Toward sustainable compost use: Prediction of organic matter via smartphone image analysis 迈向可持续堆肥使用:通过智能手机图像分析预测有机质
IF 2 3区 农林科学
Agronomy Journal Pub Date : 2025-07-20 DOI: 10.1002/agj2.70121
Satwik Pate, Kamma Donah, Somsubhra Chakraborty, David C. Weindorf, Geila S. Carvalho, Shovik Deb, Bappa Paramanik, Mona-Liza C. Sirbescu, D. P. Ray, Bin Li
{"title":"Toward sustainable compost use: Prediction of organic matter via smartphone image analysis","authors":"Satwik Pate,&nbsp;Kamma Donah,&nbsp;Somsubhra Chakraborty,&nbsp;David C. Weindorf,&nbsp;Geila S. Carvalho,&nbsp;Shovik Deb,&nbsp;Bappa Paramanik,&nbsp;Mona-Liza C. Sirbescu,&nbsp;D. P. Ray,&nbsp;Bin Li","doi":"10.1002/agj2.70121","DOIUrl":"https://doi.org/10.1002/agj2.70121","url":null,"abstract":"<p>Increased global emphasis on environmental sustainability and soil health requires efficient, accessible tools to evaluate compost organic matter (OM), a key contributor to soil quality and carbon/nutrient cycling. This study used smartphone image analysis to predict compost OM as an innovative, cost-effective alternative to laboratory methods. Utilizing 157 compost samples across North America, this research integrated smartphone-acquired images and machine learning (specifically, random forest models applied to features such as color, texture, spatial descriptors, and geographic location extracted from the images) to predict OM content. Results showed that dry samples yielded robust predictive performance (validation <i>R</i><sup>2</sup> = 0.75, root mean square error [RMSE] = 5.63%, ratio of performance to inter-quartile distance [RPIQ] = 2.97); moist samples faced challenges due to moisture-induced variability (validation <i>R</i><sup>2</sup> = 0.35, RMSE = 9.14%, RPIQ = 1.83). The better performance of dry samples was attributed to reduced surface reflectance and more stable visual features, which allowed for more accurate prediction—highlighting the importance of pre-processing in practical applications. Integrating color, texture, spatial features, and geographic location enhanced model accuracy, underscoring the importance of regional variability in compost characteristics. This smartphone-based method empowers compost producers—especially those without access to laboratory facilities—to conduct rapid, nondestructive, and on-site compost quality assessment.</p>","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144666382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Production and scavenging of reactive oxygen species in plant cells under cadmium stress 镉胁迫下植物细胞活性氧的产生和清除
IF 2 3区 农林科学
Agronomy Journal Pub Date : 2025-07-17 DOI: 10.1002/agj2.70116
Ying Hu, Huichun Wang
{"title":"Production and scavenging of reactive oxygen species in plant cells under cadmium stress","authors":"Ying Hu,&nbsp;Huichun Wang","doi":"10.1002/agj2.70116","DOIUrl":"https://doi.org/10.1002/agj2.70116","url":null,"abstract":"<p>Cadmium (Cd) causes the excessive accumulation of reactive oxygen species (ROS) in plant cells, inhibits plant growth, and reduces crop productivity (e.g., grain yields). However, our understanding of Cd migration, ROS accumulation, and the underlying mechanisms in plant cells remains limited. In this review, we summarize findings from peer-reviewed articles and their references regarding the mechanisms of Cd transport and adsorption in plant cells, plant responses to Cd toxicity, and future research directions to address current knowledge gaps. Cd migration within plant cells typically progresses through the cell wall, plasma membrane, cytoplasm, vacuolar membrane, and vacuole. Excess ROS produced by plant cells are primarily scavenged through enzymatic and non-enzymatic reactions. Further, nitric oxide signaling and sulfur metabolism play crucial roles in mitigating Cd toxicity. Additionally, crop responses to Cd can vary across different field experiments due to environmental factors. Establishing long-term field experiments can help minimize environmental interference in the response of crops to Cd. An interdisciplinary research approach has been employed to elucidate the mechanisms of energy metabolism involved in ROS scavenging. Simultaneously, addressing the problem of unclear signal transduction requires the identification of new ROS and redox sensors, redox relays, and regulatory hubs. Therefore, future research could focus on targeting Cd transport regulatory genes and cellular signaling pathways in plant cells to mitigate Cd toxicity, enhance plant productivity, and protect ecosystems.</p>","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.70116","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144647271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Impact of soybean defoliation on canopy recovery, yield, and seed quality 大豆落叶对冠层恢复、产量和种子品质的影响
IF 2 3区 农林科学
Agronomy Journal Pub Date : 2025-07-16 DOI: 10.1002/agj2.70105
Md. Rasel Parvej, Shaun Casteel, Mark Zarnstorff, James H. Houx, Mark A. Licht
{"title":"Impact of soybean defoliation on canopy recovery, yield, and seed quality","authors":"Md. Rasel Parvej,&nbsp;Shaun Casteel,&nbsp;Mark Zarnstorff,&nbsp;James H. Houx,&nbsp;Mark A. Licht","doi":"10.1002/agj2.70105","DOIUrl":"https://doi.org/10.1002/agj2.70105","url":null,"abstract":"<p>Soybean [<i>Glycine max</i> (L.) Merr.] yield loss from hailstorms depends on the growth stage when hail occurs and the magnitude of plant damage. We evaluated how soybean canopy recovery, yield, and seed quality were affected by simulated hail damage in Iowa and Indiana from 2016 to 2018. Five levels of hail damage were simulated by defoliating 0%, 25%, 50%, 75%, and 100% leaves at the full-pod (R4) and beginning of seed-fill (R5) stages. Canopy closure was similar for plants with 0%–50% defoliation but significantly reduced for plants with 75% and 100% defoliation. The normalized difference vegetation index (NDVI) and normalized difference red edge index (NDRE) predicted defoliation levels better than canopy closure, with NDRE being more sensitive for detecting canopy variation among defoliation rates. Soybean yield and yield components decreased quadratically with increasing defoliation severity. Yield loss was minimal with 25% defoliation, regardless of growth stage or location. Soybean yield declined more with 100% defoliation at the R5 stage (80%–83%) compared to the R4 stage (67%–79%). The yield loss when plants were defoliated greater than 25% was due to a reduction in seed numbers (up to 54–88 seeds plant<sup>−1</sup>) and seed weight (up to 0.022–0.052 g seed<sup>−1</sup>). Defoliation at both stages minimally affected seed protein but decreased oil concentrations when defoliation reached 75%–100%. Soybean yield and seed quality loss should not be an issue of concern for fields with up to 25% hail defoliation damage at the R4–R5 stages. Results will help refine crop insurance guidelines, improving damage assessment for farmers.</p>","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.70105","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prior to termination, the rye cover crop increased the soil methane sink 终止前,黑麦覆盖作物增加了土壤甲烷汇
IF 2 3区 农林科学
Agronomy Journal Pub Date : 2025-07-16 DOI: 10.1002/agj2.70118
Shailesh Pandit, Graig W. Reicks, Janet Moriles-Miller, Deepak R. Joshi, Sharon A. Clay, David E. Clay
{"title":"Prior to termination, the rye cover crop increased the soil methane sink","authors":"Shailesh Pandit,&nbsp;Graig W. Reicks,&nbsp;Janet Moriles-Miller,&nbsp;Deepak R. Joshi,&nbsp;Sharon A. Clay,&nbsp;David E. Clay","doi":"10.1002/agj2.70118","DOIUrl":"https://doi.org/10.1002/agj2.70118","url":null,"abstract":"<p>Even though the impact of cover crops on soil moisture has been well documented, little work has investigated the resulting impact on methane emissions. Therefore, the objective was to determine the influence of a dormant seeded rye (<i>Secale cereale</i>) cover crop on soil temperatures, soil moisture, inorganic N, and total CH<sub>4</sub>-C emission in a well-drained frigid soil from the start of growth in April/May through corn's (<i>Zea mays</i>) V4 growth stage. In this study, soil moisture, temperature, CH<sub>4</sub>-C, and N<sub>2</sub>O-N fluxes were measured near-continuously. The rye cover crop: (1) reduced the water-filled porosity in the surface 5 cm in 2018 and 2020; (2) did not influence soil temperature prior to corn's V2 growth stage, increased the soil temperature between the V2 and V4 growth stages in 2019, and reduced the soil temperature in 2020; and (3) reduced (<i>p</i> &lt; 0.01) the CH<sub>4</sub> flux prior to corn seed emergence (VE) in 2018, 2019, and 2020. Over the 3 years, rye reduced (<i>p</i> = 0.04) CH<sub>4</sub> flux (increased soil methane sink) by 6.4 g (ha × day)<sup>−1</sup> prior to VE and reduced (<i>p</i> = 0.02) carbon dioxide equivalence (CO<sub>2</sub>e) from −1.9 to −11.9 kg CO<sub>2</sub>e ha<sup>−1</sup>. These decreases accounted for 22.3% of the CO<sub>2</sub>e derived from N<sub>2</sub>O (53.4 kg CO<sub>2</sub>e-N<sub>2</sub>O) and suggest that the rye cover crop induced reductions in CH<sub>4</sub> emissions need to be considered in carbon intensity calculations.</p>","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.70118","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144647186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Polyhalite as an alternative potassium fertilizer for sweetpotatoes 多卤石作为甘薯的替代钾肥
IF 2 3区 农林科学
Agronomy Journal Pub Date : 2025-07-15 DOI: 10.1002/agj2.70114
Lily Kile, Alex Woodley, Luke Gatiboni, David Suchoff
{"title":"Polyhalite as an alternative potassium fertilizer for sweetpotatoes","authors":"Lily Kile,&nbsp;Alex Woodley,&nbsp;Luke Gatiboni,&nbsp;David Suchoff","doi":"10.1002/agj2.70114","DOIUrl":"https://doi.org/10.1002/agj2.70114","url":null,"abstract":"<p>Polyhalite is a mineral that contains a significant source of potassium (K). Muriate of potash (MOP) is a widely used, well-characterized, and available source of K fertilizer. This study evaluated polyhalite as a source of K fertilizer compared to the more commonly used MOP by measuring yields, nutrient uptake, and soil K in Covington sweetpotato (<i>Ipomoea batatas</i>) production. MOP and polyhalite were applied at increasing rates (32.5, 62, 126, and 188 K<sub>2</sub>O ha<sup>−1</sup>) to determine optimum application rates and comparative yield responses between sources. Yield regression showed a quadratic response to fertilizer application regardless of source, with a peak marketable yield of 37 t ha<sup>−1</sup> at approximately 100 kg K<sub>2</sub>O ha<sup>−1</sup>. Fertilizer rates above 100 kg K<sub>2</sub>O ha<sup>−1</sup> resulted in a decline in yields. MOP initially released a higher amount of K than polyhalite, highlighting differences in early-season K solubility. There were no differences in root or leaf tissue concentrations of K, calcium (Ca), and magnesium (Mg) in response to treatments; however, polyhalite treatments did result in increased sulfur storage in leaf and root tissue. These findings suggest that polyhalite can be used as an alternative source of K with comparable responses to the MOP in sweetpotatoes, and that polyhalite can be used as a slow-release fertilizer or source of sulfur.</p>","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.70114","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimizing inorganic nitrogen extraction method to evaluate alternative cropping strategies 优化无机氮提取方法评价替代种植策略
IF 2 3区 农林科学
Agronomy Journal Pub Date : 2025-07-15 DOI: 10.1002/agj2.70120
Olufemi Adebayo, Vesh R. Thapa, April Ulery, Meagan Schipanski, Rajan Ghimire
{"title":"Optimizing inorganic nitrogen extraction method to evaluate alternative cropping strategies","authors":"Olufemi Adebayo,&nbsp;Vesh R. Thapa,&nbsp;April Ulery,&nbsp;Meagan Schipanski,&nbsp;Rajan Ghimire","doi":"10.1002/agj2.70120","DOIUrl":"https://doi.org/10.1002/agj2.70120","url":null,"abstract":"<p>Nitrogen (N) is essential for all land plants, but crops use only ∼50% of the fertilizer N, the rest being lost to the environment. Accurate estimation of soil N and optimizing N fertilizer management are critical for enhancing agricultural sustainability and profitability. This study compared the performance of five extraction methods: distilled water (DW) at room temperature (25°C), and 1 and 2 M potassium chloride (KCl) extractions conducted either cold (25°C) or hot (100°C for 4 h) to evaluate their performance in estimating inorganic N. The most practical methods identified through this comparison were then used to assess inorganic N responses to eight cover crop treatments, including single species, binary mixtures, and multispecies combinations with two compost levels (0 and 16.8 Mg ha<sup>−1</sup>) in a semiarid agroecosystem. Results revealed that all KCl-based methods extracted significantly more inorganic N than DW. In January samples (before compost application), no difference was observed between 1 M cold and hot KCl. However, during the July sampling, 1 M hot KCl extracted significantly more inorganic N, ranging from 25% to 440% higher than 1 M cold KCl in compost-amended soils. No significant differences were observed among cover crop treatments. While 1 M cold KCl remained effective in early season, 1 M hot KCl better captured compost-enhanced N availability later. Compost consistently improved inorganic N, underscoring its role in nutrient management. Tailoring extraction methods to management practice and seasonal timing can enhance N assessment and support sustainable nutrient management.</p>","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.70120","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rye performance in central Iowa under different seeding and nitrogen fertilizer rates 不同施氮量和播种量对爱荷华州中部黑麦产量的影响
IF 2 3区 农林科学
Agronomy Journal Pub Date : 2025-07-09 DOI: 10.1002/agj2.70112
Cecilia Crespo, Robert W. Malone, Anna Radke, John L. Kovar, Bryan D. Emmett, Gary W. Feyereisen, Kelly R. Thorp, Tom Richard, Peter L. O'Brien
{"title":"Rye performance in central Iowa under different seeding and nitrogen fertilizer rates","authors":"Cecilia Crespo,&nbsp;Robert W. Malone,&nbsp;Anna Radke,&nbsp;John L. Kovar,&nbsp;Bryan D. Emmett,&nbsp;Gary W. Feyereisen,&nbsp;Kelly R. Thorp,&nbsp;Tom Richard,&nbsp;Peter L. O'Brien","doi":"10.1002/agj2.70112","DOIUrl":"https://doi.org/10.1002/agj2.70112","url":null,"abstract":"<p>The inclusion of a harvested winter cereal before soybean [<i>Glycine max</i> (L.) Merr.] can increase productivity and sustainability of a cereal-soybean rotation. Still, literature disagrees on proper seeding and fertilizer rates of the winter cereal for efficient production of both crops in the rotation. This study aimed to evaluate rye (<i>Secale cereale</i> L.) spring green ground cover, biomass production, and nitrogen (N) accumulation in a rye-soybean rotation, using three seeding rates (20, 40, and 60 kg ha<sup>−1</sup>) and three N rates (0, 30, and 60 kg N ha<sup>−1</sup>) from 2021 to 2023 in central Iowa. Remote sensing was used to assess rye growth. Green ground cover was up to 42% higher in the highest seeding rate (60 kg ha<sup>−1</sup>). Conversely, rye biomass production was not affected by seeding or N rates and averaged 3.0 ± 1.1 and 4.9 ± 1.3 Mg ha<sup>−1</sup> in the first and second growing seasons, respectively. Rye N accumulation increased 0.13 and 0.51 kg N ha<sup>−1</sup> for each kg N applied in the first and second growing seasons, respectively. Soybean yield was similar among treatments but 19%–38% lower than the county average production, especially in the second growing season due to limited precipitation. This study provides new evidence that rye biomass production can be optimized with low inputs, whereas higher seeding rates increase spring green ground cover. However, because of reduced soybean yields, further studies are needed to evaluate rye harvest time and alternative soybean varieties to optimize soybean production after rye for central Iowa conditions.</p>","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144589713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Impact of calibration strategy and data on wheat simulation with the DSSAT-Nwheat model 标定策略和数据对DSSAT-Nwheat模型小麦模拟的影响
IF 2 3区 农林科学
Agronomy Journal Pub Date : 2025-07-09 DOI: 10.1002/agj2.70111
Ashifur Rahman Shawon, Ahmed Attia, Jonghan Ko, Emir Memic, Ralf Uptmoor, Bernd Hackauf, Til Feike
{"title":"Impact of calibration strategy and data on wheat simulation with the DSSAT-Nwheat model","authors":"Ashifur Rahman Shawon,&nbsp;Ahmed Attia,&nbsp;Jonghan Ko,&nbsp;Emir Memic,&nbsp;Ralf Uptmoor,&nbsp;Bernd Hackauf,&nbsp;Til Feike","doi":"10.1002/agj2.70111","DOIUrl":"https://doi.org/10.1002/agj2.70111","url":null,"abstract":"<p>Cropping system models (CSMs) are valuable tools for analyzing genotype, environment, and management (G × E × M) interactions in crop production. To apply a CSM in a new region with specific soils, climate, and cultivars, proper calibration and evaluation are required. However, calibration methods vary widely, often depending on modelers' expertise and approach. This study compares three calibration strategies for the DSSAT-Nwheat model using two datasets: one including yield components (1000-kernel mass, ears per m<sup>2</sup>, grain number per m<sup>2</sup>) alongside phenology and grain yield, and another excluding yield components. The datasets cover ∼100 site-years of winter wheat (<i>Triticum aestivum</i>) data from German pre-registration trials and field experiments. The calibration approaches were (1) stepwise calibration of phenology, biomass, and yield, (2) simultaneous calibration of multiple genetic coefficients, and (3) a hybrid approach combining elements of both. The Time-Series cultivar coefficient estimator tool was used for implementation. Including yield component data improved model accuracy, reducing root mean square error (RMSE) by up to 10% for key variables such as phenology (3.4–5.5 days). Future wheat yield projections under selected climate scenarios varied by strategy and dataset, ranging from 6376 to 7473 kg ha<sup>−1</sup> in fertile, wet soils and 6108 to 6757 kg ha<sup>−1</sup> in poorer, dry soils. These results highlight the impact of calibration strategy and dataset choice on model performance. Transparent calibration practices are essential for improving CSM reliability in regional agricultural analysis under diverse environmental conditions.</p>","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.70111","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144589516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Manure use benefits and barriers according to agricultural stakeholders 根据农业利益相关者的说法,粪肥使用的好处和障碍
IF 2 3区 农林科学
Agronomy Journal Pub Date : 2025-07-08 DOI: 10.1002/agj2.70110
MaryGrace Erickson, Erin Cortus, Rick Koelsch, Leslie Johnson, Melissa L. Wilson, Dan Andersen, Mara Zelt, Amy Millmier Schmidt
{"title":"Manure use benefits and barriers according to agricultural stakeholders","authors":"MaryGrace Erickson,&nbsp;Erin Cortus,&nbsp;Rick Koelsch,&nbsp;Leslie Johnson,&nbsp;Melissa L. Wilson,&nbsp;Dan Andersen,&nbsp;Mara Zelt,&nbsp;Amy Millmier Schmidt","doi":"10.1002/agj2.70110","DOIUrl":"https://doi.org/10.1002/agj2.70110","url":null,"abstract":"<p>Using manure as a crop fertilizer promotes recycling of locally available organic nutrients and reduces needs for manufactured inorganic fertilizers. However, the factors that motivate and constrain manure use are unclear. To explore stakeholder perceptions, we designed a quantitative survey assessing potential benefits and barriers to manure use, knowledge of manure impacts, and preferred information resources. Using mailing lists and mass media, we distributed the online survey to a broad sample of crop farmers, animal feeding operation managers, and public and private sector advisors in the United States and Canada (<i>n</i> = 709 responses). In addition to computing descriptive statistics, we examined associations between participant role and years of experience with response choices using cumulative logistic and log-binomial models. Overall, respondents rated manure as highly beneficial to crop yields, soil fertility, soil physical properties, and soil biological properties, but shared mixed perceptions regarding the impacts of manure on environmental quality. The most frequently identified barriers to manure use were (1) the cost of manure transportation and land application, (2) odors and air quality impairment, and (3) the timeliness of manure application. Respondents reported they were likely to use scientific information sources and their professional networks in making manure nutrient management decisions. Additionally, we found that role and years of professional experience were often associated with response choices, illustrating distinct extension and education needs of different stakeholder segments. Our results indicated wide recognition of manure benefits to crop yields and soil properties and suggested that practical barriers may often limit manure use.</p>","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 4","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.70110","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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