Agronomy Journal最新文献_第2页

Bayesian-optimized experimental designs for estimating the economic optimum nitrogen rate: a model-averaging approach 估计经济最优氮肥用量的贝叶斯优化实验设计：模型平均方法

IF 2 3区农林科学

Agronomy Journal Pub Date : 2025-06-04 DOI: 10.1002/agj2.70087

Custódio Efraim Matavel, Andreas Meyer-Aurich, Hans-Peter Piepho

{"title":"Bayesian-optimized experimental designs for estimating the economic optimum nitrogen rate: a model-averaging approach","authors":"Custódio Efraim Matavel, Andreas Meyer-Aurich, Hans-Peter Piepho","doi":"10.1002/agj2.70087","DOIUrl":"https://doi.org/10.1002/agj2.70087","url":null,"abstract":"Field experiments play a crucial role in optimizing nutrient application strategies and determining the economic optimum nitrogen rate (EONR), aiding stakeholders in agricultural decision-making. These experiments tailor agricultural input management to maximize efficiency and sustainability, ultimately improving farm economics. However, the optimal setup of field experiments remains an ongoing debate, particularly regarding economic considerations such as the selection of treatment levels (design points), their spatial arrangement, and the number of replications required for statistical validity and cost-effectiveness. This study optimizes field experiments for estimating the EONR using a model-averaging approach within a Bayesian framework. We employed Bayesian inference and the No-U-turn sampler to integrate model averaging across multiple yield response models, improving robustness in EONR estimation. Stochastic optimization, specifically simultaneous perturbation stochastic approximation, was used to optimize experimental designs, and their performance was evaluated through Monte Carlo simulations. Our results show that optimized experimental designs significantly improve the precision of EONR estimates. Designs incorporating higher number of nitrogen levels provided the best trade-off between accuracy and efficiency, minimizing bias and mean squared error. Even with a fixed total number of plots (120), increasing the number of design points resulted in lower variance, demonstrating the efficiency of well-structured experimental designs. This research lays the groundwork for future developments in experimental methodologies with wide-ranging implications for agricultural economics and policymaking, ultimately supporting better-informed decision-making. Future work should integrate environmental constraints and account for real-world variability in treatment replication to further refine experimental optimization strategies.","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.70087","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213947","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

Insecticides in field pea benefit grain yield and protein concentration 田间豌豆杀虫剂有利于籽粒产量和蛋白质浓度的提高

IF 2 3区农林科学

Agronomy Journal Pub Date : 2025-06-04 DOI: 10.1002/agj2.70082

Samuel T. Koeshall, Perry R. Miller, Clain A. Jones, Kevin W. Wanner, Jeffrey A. Holmes

{"title":"Insecticides in field pea benefit grain yield and protein concentration","authors":"Samuel T. Koeshall, Perry R. Miller, Clain A. Jones, Kevin W. Wanner, Jeffrey A. Holmes","doi":"10.1002/agj2.70082","DOIUrl":"https://doi.org/10.1002/agj2.70082","url":null,"abstract":"Pea leaf weevil (Sinoa lineatus L.) (PLW) has established robust populations throughout the Northern Great Plains as field pea (Pisum sativum L.) has become a popular legume species in cropping systems across the region and has established itself as a major economic insect of concern for pea growers. Adult PLW feeds on leaflet margins after plant emergence, reducing yield potential. Following oviposition, PLW larvae utilize rhizobium nodules as their main food source, decreasing N fixation, N availability, and grain protein concentration. Chemical controls are available to control PLW infestations via seed coat or foliar insecticide. Previous research has shown the potential for reducing plant damage and increasing yield with chemical tools; however, little research has been conducted on the benefit that these chemical controls have on improving yield and protein. An experiment was established in Bozeman, MT, for 3 years to evaluate three rates (control, low, and high) of seed-coat-applied thiamethoxam and three application timings (control, early, and late) of foliar-applied lambda-cyhalothrin on pea grain yield, grain protein concentration, and protein yield. Spraying lambda-cyhalothrin increased grain yield by 162 (early) and 128 (late) kg ha−1, resulting in a mean net profit increase of $68.68 ha−1. Applying seed coat thiamethoxam resulted in elevated grain protein (p = 0.098) and protein yield levels (p = 0.072), with a $14 ha−1 net profit increase at the high rate via protein premiums. This study shows the agronomic benefits to pea producers of using seed-applied and foliar insecticides to mitigate PLW, thereby increasing yield and grain protein concentration.","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.70082","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144206658","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

Agronomic responses of transitioning organic grain rotations employing multi-tactic tillage and cover cropping strategies 采用多策略耕作和覆盖种植策略过渡有机轮作的农艺响应

IF 2 3区农林科学

Agronomy Journal Pub Date : 2025-06-04 DOI: 10.1002/agj2.70095

Ravi Teja K. R. Neelipally, Arjun Chhetri, Debasish Saha, Song Cui, Sindhu Jagadamma

{"title":"Agronomic responses of transitioning organic grain rotations employing multi-tactic tillage and cover cropping strategies","authors":"Ravi Teja K. R. Neelipally, Arjun Chhetri, Debasish Saha, Song Cui, Sindhu Jagadamma","doi":"10.1002/agj2.70095","DOIUrl":"https://doi.org/10.1002/agj2.70095","url":null,"abstract":"The transition from conventional to organic farming presents challenges and opportunities for enhancing agricultural sustainability. This study evaluated the impacts of four organic grain cropping systems, varying in tillage, cover crops, fertility management, and rotational sequence, on cover crop biomass, grain yield, and weed suppression over a 3-year transition period. The cropping systems included (i) maximum yield system (MYS) for maximizing production; (ii) sustainable yield system (SYS) for balancing yield and ecological benefits; (iii) ecologically conscious system (ECS) for maximizing ecological benefits; and (iv) low input system (LIS) for sustaining the system without external fertility inputs. Implemented in a 3-year rotation of soybean (Glycine max), wheat (Triticum aestivum), and corn (Zea mays), these treatments utilized a full-entry design with all three cash crop phases repeated annually. The MYS and SYS treatments achieved the highest cover crop biomass (7–12 Mg ha−1 Year−1) and weed suppression, while LIS had the lowest biomass (0–6 Mg ha−1 Year−1) and highest weed pressure. Fertilized treatments (MYS, SYS, and ECS) consistently produced satisfactory yields, with Year 3 averages of 4.66 Mg ha−1 for corn, 2.47 Mg ha−1 for full-season soybean, 4.06 Mg ha−1 for wheat, and 1.5 Mg ha−1 for double-crop soybeans. Also, agronomic outcomes (biomass and grain yield) of less-tilled SYS and ECS were on par with the most-tilled MYS system. Thus, this research highlights the potential for reducing tillage intensity in organic grain farming without compromising agronomic outcomes in the southeastern United States.","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213945","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

Nitrogen fertilization to malt barley enhances pea yield and quality, regardless of cover cropping, in the malt barley–pea rotation 在麦大麦-豌豆轮作中，不论覆盖种植与否，施氮均可提高豌豆产量和品质

IF 2 3区农林科学

Agronomy Journal Pub Date : 2025-06-03 DOI: 10.1002/agj2.70085

Upendra M. Sainju

{"title":"Nitrogen fertilization to malt barley enhances pea yield and quality, regardless of cover cropping, in the malt barley–pea rotation","authors":"Upendra M. Sainju","doi":"10.1002/agj2.70085","DOIUrl":"https://doi.org/10.1002/agj2.70085","url":null,"abstract":"Cover crop and N fertilization rate to malt barley (Hordeum vulgare L.) (NRMB) can affect soil residual NO3-N that may alter pea (Pisum sativum L.) growth, yield, and quality in the malt barley–pea rotation. The effect of cover crop (oat [Avena sativa L.) cover crop vs. none) and NRMB (0, 40, 50, 60, 70, and 80 kg N ha−1) were examined on soil residual NO3-N and pea growth, yield, and quality in the malt barley–pea rotation from 2014 to 2019 in the US northern Great Plains. Soil residual NO3-N content increased with increasing NRMB. Cover crop biomass yield was 33%–393% greater with than without NRMB in 2015 and 2016. Pea grain yield and N uptake were 40%–41% greater for 40 than 60 kg N ha−1 of NRMB in 2015 and 45%–167% greater for 70 than 0 kg N ha−1 in 2018. Grain test weight was 27% greater with than without NRMB in 2014 and 2019. Harvest index was 22%–29% greater for 70 than 40, 60, and 80 kg N ha−1 in 2014, but 18%–33% greater for 0 than 50 or 80 kg N ha−1 in 2017 and 2019. Nitrogen harvest index was 13%–14% greater for 0 than 50 and 60 kg N ha−1 in 2015 and 2019. Straw yield, N concentration, N uptake, and grain protein concentration were 10%–34% greater with than without NRMB. Nitrogen fertilization to malt barley enhanced pea yield and quality, regardless of cover cropping, in the malt barley–pea rotation in the northern Great Plains.","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.70085","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144206371","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

Sulfur fertilization sources for multisite sugarcane (Saccharum spp.) fields in Brazil 巴西多点甘蔗（Saccharum spp.）田的硫施肥来源

IF 2 3区农林科学

Agronomy Journal Pub Date : 2025-06-02 DOI: 10.1002/agj2.70088

Rafael Otto, Lucas Miguel Altarugio, Victor Xavier Rizzo, Estêvão Vicari Mellis, Sarah Tenelli, Johnny Rodrigues Soares, Sarah Mello Leite Moretti

{"title":"Sulfur fertilization sources for multisite sugarcane (Saccharum spp.) fields in Brazil","authors":"Rafael Otto, Lucas Miguel Altarugio, Victor Xavier Rizzo, Estêvão Vicari Mellis, Sarah Tenelli, Johnny Rodrigues Soares, Sarah Mello Leite Moretti","doi":"10.1002/agj2.70088","DOIUrl":"https://doi.org/10.1002/agj2.70088","url":null,"abstract":"Sulfur (S) deficiency in soils has become a common problem in Brazilian sugarcane (Saccharum spp.) fields due to high nutrient extraction by the crop without adequate replacement. Five field trials were conducted in Brazil over two consecutive ratoon cycles to evaluate S fertilizer sources and application rates and their residual effects on soil S availability and sugarcane yield. The treatments included (1) two S application rates (50 and 100 kg S ha−1), (2) four S sources (gypsum, elemental sulfur [ES], ammonium sulfate [AS], and polysulfate [PS]), and (3) a control (no S application). The PS and AS were applied in band over sugarcane rows, whereas gypsum and ES were broadcast during the first ratoon, subsequently, no S was reapplied and residual effects were assessed in the second ratoon. The broadcast application of gypsum at 100 kg S ha−1 increased the available soil S concentration after 6 and 12 months. However, S levels remained below 10 mg dm−3 after two ratoon harvests, regardless of the S source. Leaf S concentration increased after band application of PS at 100 kg S ha−1 in both ratoon cycles and after broadcast application of ES and gypsum (residual effect) in the second ratoon. Stalk yield increased by an average of 5–7 Mg ha−1 across sites in the first ratoon with S sources application. In the second ratoon, significant residual effects of S sources led to an increase in stalk yield, averaging 7–9 Mg ha−1 compared to the control. Our findings indicate that S fertilization should be applied annually, with sulfate-based fertilizers preferred in the short term. ES shows potential for long-term S supply.","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.70088","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197524","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

Low-input, interpretable models to forecast maize yield at multiple scales based on absorbed radiation 基于吸收辐射的低投入、可解释的多尺度玉米产量预测模型

IF 2 3区农林科学

Agronomy Journal Pub Date : 2025-06-01 DOI: 10.1002/agj2.70089

Martin Menendez-Coccoz, Diego H. Rotili, María E. Otegui, Gustavo Martini, María Paolini, Carlos Di Bella, Gervasio Piñeiro, Martín Oesterheld

{"title":"Low-input, interpretable models to forecast maize yield at multiple scales based on absorbed radiation","authors":"Martin Menendez-Coccoz, Diego H. Rotili, María E. Otegui, Gustavo Martini, María Paolini, Carlos Di Bella, Gervasio Piñeiro, Martín Oesterheld","doi":"10.1002/agj2.70089","DOIUrl":"https://doi.org/10.1002/agj2.70089","url":null,"abstract":"Most crop yield forecast models operate at coarse scales (e.g., county or region) or need extensive input data for finer resolutions. Here, we present maize (Zea mays L.) yield forecast models that require minimal user data and operate at field and regional scales throughout the growing season. Using 1853 maize field-years in Argentina, with known location, sowing date, and yield, our models leveraged absorbed radiation (from satellite imagery), temperature-based phenology, regional site-year properties, El Niño-Southern Oscillation (ENSO) phase predictions, and sowing period. At the field scale, our models achieved high accuracy at physiological maturity, with a mean error of 1 t ha−1 (16%). Yield forecasts were mainly driven by absorbed radiation during the reproductive phase and a regional factor. Early-season forecasts incorporated ENSO and sowing period, but with reduced accuracy. When scaled to regional forecasts, the models performed even better, with a mean error of 0.3 t ha−1 (4%). These results combine a novel case of yield forecast because of the low data requirements from users, high anticipation (30–90 days before harvest), and good levels of accuracy at both field and regional scales. Additionally, the models’ interpretability makes them valuable diagnostic tools for post-season analysis.","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144190865","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

Influence of no-till furrow opener and seed treatment on ultra-early wheat seeding systems 免耕开沟和种子处理对小麦超早播系统的影响

IF 2 3区农林科学

Agronomy Journal Pub Date : 2025-05-25 DOI: 10.1002/agj2.70084

Brian L. Beres, Zhijie Wang, Ryan Dyck, Steven Simmill, Warren Taylor, Kaitlyn Heidinger, F. Craig Stevenson

{"title":"Influence of no-till furrow opener and seed treatment on ultra-early wheat seeding systems","authors":"Brian L. Beres, Zhijie Wang, Ryan Dyck, Steven Simmill, Warren Taylor, Kaitlyn Heidinger, F. Craig Stevenson","doi":"10.1002/agj2.70084","DOIUrl":"https://doi.org/10.1002/agj2.70084","url":null,"abstract":"Ultra-early planting is an alternative practice that involves planting based on soil temperature, initiated once the trigger temperature of >0°C is observed, regardless of calendar date. Our previous research concluded that spring wheat (Triticum aestivum L.) grain yields are maintained or improved with enhanced yield stability when adopting this practice. However, a knowledge gap remains around the influence of furrow opener configuration and seed treatments to mitigate abiotic stressors related to cold soil and ambient temperatures. Thus, a 5-year experiment was conducted in Lethbridge, AB, to examine the effects of planting dates triggered by soil temperatures of 0°C, 2.5°C, 5°C, 7.5°C, and 10°C; seed treatment (tebuconazole, prothioconazole, metalaxyl, and imidacloprid vs. untreated); and furrow opener (knife vs. disc) on ultra-early planted spring wheat. Optimal grain yield was achieved when wheat was planted at a soil temperature of 0°C, irrespective of seed treatment and furrow opener type. A significant yield reduction was observed when wheat was planted at a soil temperature of 10°C. Wheat planted at soil temperatures of ≤7.5°C with a disc opener often resulted in high and stable yields, regardless of seed treatment. Grain protein concentration responses to soil temperature trigger were less consistent, but wheat planted at 10°C accumulated low and unstable concentrations. Seed treatment delayed emergence, flowering, and maturity; reduced head density; and ultimately lowered grain yield. Overall, spring wheat grain yield and protein concentration were optimized when planted at soil temperatures of ≥0 and ≤7.5°C using a disc opener, regardless of seed treatment adoption.","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.70084","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135542","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

Photoperiod and vernalization requirements in Argentinian oat genotypes 阿根廷燕麦基因型的光周期和春化需求

IF 2 3区农林科学

Agronomy Journal Pub Date : 2025-05-22 DOI: 10.1002/agj2.70078

Juan Ignacio Dietz, Laura Victoria Da Silva, Matías Schierenbeck, Martín Pardi, María Rosa Simón

{"title":"Photoperiod and vernalization requirements in Argentinian oat genotypes","authors":"Juan Ignacio Dietz, Laura Victoria Da Silva, Matías Schierenbeck, Martín Pardi, María Rosa Simón","doi":"10.1002/agj2.70078","DOIUrl":"https://doi.org/10.1002/agj2.70078","url":null,"abstract":"Understanding the response to temperature, vernalization, and photoperiod provides a significant advantage for optimizing the adaptability of oat (Avena sativa) genotypes to different production areas and sowing seasons in a climate change context. For this, two experiments were carried out in the Argentinian Pampas, where nine oat genotypes were sown on six sowing dates (from June to December, <10 h to >15 h photoperiod) and three vernalization treatments (40, 20, and 0 days at 4°C). Days from emergence to flowering were evaluated and then converted to growing degree days. The adjustment of duration from emergence to flowering using an average photoperiod was performed using bilinear regressions to determine the photoperiod sensitivity (Ps), threshold (Pt), and earliness per se. Our findings showed that genotypes were insensitive to vernalization, others with minimal requirements (<480 cold hours at 4°C) while materials with high requirements were not found, indicating a reasonably constrained range of variability. Different photoperiod responses were found between the genotypes explained by differences in Ps (slopes from −310°C days h−1 to −158°C days h−1) and Pt. Overall, vernalization was not strictly necessary for flowering across all genotypes or sowing dates, but its fulfillment significantly accelerated developmental transitions under long-day conditions.","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117976","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

Corn growth and yield response to starter fertilizer in phosphorus-sufficient soils 富磷土壤中玉米生长和产量对发酵剂的响应

IF 2 3区农林科学

Agronomy Journal Pub Date : 2025-05-22 DOI: 10.1002/agj2.70079

Larousse Dorissant, Jason Clark, Péter Kovács

{"title":"Corn growth and yield response to starter fertilizer in phosphorus-sufficient soils","authors":"Larousse Dorissant, Jason Clark, Péter Kovács","doi":"10.1002/agj2.70079","DOIUrl":"https://doi.org/10.1002/agj2.70079","url":null,"abstract":"Previous research on starter fertilizer application has shown significant grain yield improvement; yet the greatest responses often occur on fields below the critical soil phosphorus (P) threshold. This study aimed to (i) investigate the impacts of starter fertilizer placement on corn growth, nutrient uptake, and grain yield in P-sufficient soils and (ii) determine whether the timing of planting influences corn response to starter fertilizer placement across different growing environments. Field experiments were conducted at three locations in eastern South Dakota from 2021 to 2023, comparing an early with a normal planting date utilizing different starter fertilizer combinations, placements, and rates. Liquid fertilizers were used with and without zinc, placed in the seed in-furrow at a lower (IFL) and a higher (IFH) rates, 5 × 5 normal rate placement (5 × 5), a combination of IFL and 5 × 5 placement and a control treatment without starter fertilizer application, with nutrient rates 10, 15, 25, 35, and 0 kg P2O5 ha−1, respectively. The planting timing did not significantly influence corn response to starter fertilizer placement across the locations. Starter fertilizer placement, relative to the control, increased early-season growth stage by 3.2% and 2.3%, plant height by 0.75 and 3.1 cm, dry matter production by 83 kg ha−1, N and P uptake by 3.1 and 0.34 kg ha−1, respectively. However, these improvements did not translate into increased whole season crop physiological parameters or grain yield. Therefore, this result indicates that starter fertilizer application will not be necessary on P-sufficient soils for yield increased in eastern South Dakota.","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agj2.70079","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144118130","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

Response of potato tuber yield and uptake to potassium and nitrogen in sandy soils 沙质土壤马铃薯块茎产量和吸收对钾、氮的响应

IF 2 3区农林科学

Agronomy Journal Pub Date : 2025-05-22 DOI: 10.1002/agj2.70081

Simranpreet K. Sidhu, Ayush Sharma, Navdeep Kaur, Amanpreet Sandhu, Hayden Shellenbarger, Lincoln Zotarelli, Christian Christensen, Simon Riley, Lakesh K. Sharma

{"title":"Response of potato tuber yield and uptake to potassium and nitrogen in sandy soils","authors":"Simranpreet K. Sidhu, Ayush Sharma, Navdeep Kaur, Amanpreet Sandhu, Hayden Shellenbarger, Lincoln Zotarelli, Christian Christensen, Simon Riley, Lakesh K. Sharma","doi":"10.1002/agj2.70081","DOIUrl":"https://doi.org/10.1002/agj2.70081","url":null,"abstract":"Potassium (K) is essential for potato (Solanum tuberosum L.) production, influencing physiological processes, nutrient uptake, and tuber quality. This study evaluated the interactive effects of K and nitrogen (N) on potato yield and quality in Florida's sandy soils to determine optimal K application rates for maximum yield and improved N use efficiency. A 2-year experiment was conducted in a split-plot design with three N rates (168, 224, and 280 kg N ha−1) in the main plot and six K rates (0, 112, 224, 336, 448, and 560 kg K2O ha−1) in subplots in four replications in Hastings, FL. Results revealed a significant effect of seasons on the soil K availability, uptake, tuber yield, and nutrient use efficiency. The soil K levels and uptake increased with higher K application rates across all potato growth stages. Regression analysis identified optimum K rate of 425 and 535 kg K₂O ha−1 for total and marketable tuber yield, respectively. In the first season, total tuber yield increased by 33% and 38% at K application rates of 336 and 560 kg K₂O ha−1, respectively, compared to no K application. Tuber specific gravity was not affected by K rates, while the higher K application rates increased the N use efficiency and decreased benefit-cost ratio. The study concludes that K application rates above 425 kg K₂O ha−1 maximize potato tuber yield and enhance N efficiency, supporting the revision of K recommendations in sandy soils based on low K status.","PeriodicalId":7522,"journal":{"name":"Agronomy Journal","volume":"117 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144118177","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