Agrosystems, Geosciences & Environment最新文献

{"title":"The role of vegetation, drying, and rewetting on water and sediment phosphorus concentrations in an experimental ditch channel experiment","authors":"Ethan D. Pawlowski,&nbsp;Lindsey Witthaus,&nbsp;Jason M. Taylor,&nbsp;Matthew T. Moore,&nbsp;Sarah McNamara,&nbsp;Eric Stevens,&nbsp;Quentin D. Read","doi":"10.1002/agg2.70168","DOIUrl":"10.1002/agg2.70168","url":null,"abstract":"<p>Intermittent drying and rewetting of agricultural drainage ditch networks along with vegetation presence play a significant role in phosphorus (P) fate and transport to the receiving water bodies. To examine how vegetation influences the response of P transport to drying and rewetting, we lined six low-gradient (0.01% slope) stainless steel experimental ditches with alluvial sediment and planted vegetation (rice cutgrass, <i>Leersia oryzoides</i>) in three ditches while maintaining bare sediment in the other three ditches. We then added a 26-g P pulse to each ditch and recirculated the ditch water for maximum retention prior to draining. Three subsequent wetting periods, separated by 10-day drying periods, used water with no added P that flowed through the ditches (i.e., water did not recirculate). We monitored discharge, water quality, and P concentrations during the initial P addition and subsequent rewetting periods. Sediment properties, including water-extractable P, were sampled before and after each rewetting period. The vegetated ditches rapidly removed P from the water column, but similar total removal was observed in all ditches following the first wet period. Subsequent rewetting periods released concentrations between 14 and 45 µg P L⁻¹ in both treatments. Integrated release rates showed 99% P retention in the vegetated ditches and 98% retention in unvegetated ditches after all wet and dry cycles. Water-extractable P was not found to be significantly different based on channel feature, vegetation presence, or time. Our results suggest P is likely retained in both vegetated and unvegetated low-gradient ditches with intermittent flow regimes and similar sediment properties.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70168","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144615088","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 variability assessment of post-flowering drought stress tolerance in selected sorghum (Sorghum bicolor L. Moench) genotypes","authors":"Yirgalem Tsehaye,&nbsp;Fetien Abay,&nbsp;Taye Tadesse,&nbsp;Kassahun Bantte,&nbsp;Temesgen M. Menamo","doi":"10.1002/agg2.70142","DOIUrl":"10.1002/agg2.70142","url":null,"abstract":"<p>Drought is a severe abiotic stress that significantly limits crop production in sub-Saharan Africa. Different sorghum (<i>Sorghum bicolor</i> L. Moench) genotypes respond differently to pre-flowering and post-flowering drought stresses. In Ethiopia, post-flowering has significant influence on yield reduction. The aim of this study was to assess the response of 216 sorghum accessions under post-flowering drought stress and non-stress conditions. The experiment was conducted at Melkassa Agricultural Research Center and Werer Agricultural Research Center in Ethiopia, using a row-column design with two replications under stress and non-stress conditions. The results from both sites indicated a significant difference among accessions in both water-stress and well-water regimes, suggesting that the tested accessions were diverse. While the phenotypic variance was higher than the genetic variance for all characters under study, the narrow range of difference indicated that most of the characters were less influenced by the environment. Stress tolerance index, mean productivity, geometric mean productivity, harmonic mean productivity, and yield index were identified as appropriate indices to select drought-tolerant sorghum accessions. The data from both sites on drought tolerance indices showed that drought stress in sorghum can significantly reduce grain yield. Selection by these indices can help identify a genotype with desirable yield in both stress and non-stress conditions. Based on significant associated indices, cluster analysis showed that the accessions tended to group into four clusters: tolerant, semi-tolerant, semi-sensitive, and sensitive. Among all accessions, Acc#222888, Acc#28546, and Acc#216739 were identified as the most drought-tolerant in both research sites, and they might be a potential source of genetic material for drought tolerance. The study highlights the importance of evaluating sorghum genotypes for post-flowering drought resistance under different irrigation conditions to identify potential sources of genetic material for breeding programs aimed at developing drought-tolerant sorghum varieties.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70142","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614981","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":"Fire effects on the composition of soil seed bank and soil properties in Iran","authors":"Rouhollah Rezaei,&nbsp;Abbas Ahmadi,&nbsp;Nourollah Abdi,&nbsp;Hamid Toranjzar","doi":"10.1002/agg2.70133","DOIUrl":"10.1002/agg2.70133","url":null,"abstract":"<p>Fire is a frequent phenomenon in rangelands and because of its complicated and different effects on natural ecosystems, it has great importance. Awareness of such fire effects on vegetation cover in point of rangeland management after fire is important and helps better understanding and sustainable management of rangelands. Fire effects on soil seed bank (SSB) is a fundamental subject in ecology and phytosociology. These seeds have a vital role in the maintenance and reclamation of deteriorated rangelands and also in plant composition improvement in plant communities. This study was conducted to evaluate the effect of fire on vegetation, SSB, and soil properties in Sarkhalaj rangelands of Kangavar, Kermanshah province. One year after the prescribed fire, in two areas of the control (grazing exclosure) and prescribed fire, the percentage of canopy cover and soil properties were sampled on transects with a systematic random approach. Seed bank samples were sampled on these transects in two depths of 0–5 and 5–10 cm. The sampling was repeated after burning the canopy. After greenhouse cultivation, germinated seedlings were identified and the composition and density of SSB and soil properties were determined. The results indicated that compared to before the prescribed fire, the diversity, richness, and evenness indices were significantly reduced. The results of SSB in the depth of 0–5 cm showed that prescribed fire decreased the diversity and species richness indices. Moreover, at 5- to 10-cm depth, prescribed fire had no significant effect on diversity indices. At 0- to 5-cm depth, the prescribed fire increased the pH, carbon/nitrogen (C/N) ratio, electrical conductivity, and Mg and decreased the organic matter%, and N%. However, at 5- to 10-cm depth, the prescribed fire had no significant effect on the soil's physiochemical properties. Overall, it could be said that by changing the site conditions, both in terms of the space required for the establishment of new species and by changing the soil properties, the prescribed fire caused a change in SSBs in the area. This study indicated that seeds stored within the soil under certain shrub species are at a high risk of mortality during prescribed fire. Thus, successful post-fire recovery does not rely on the seed bank reservoir under these shrubs.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70133","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614983","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":"Agronomic performance of Camelina sativa under waterlogging conditions","authors":"Andrés Locatelli,&nbsp;Sebastián R. Mazzilli","doi":"10.1002/agg2.70180","DOIUrl":"10.1002/agg2.70180","url":null,"abstract":"<p><i>Camelina sativa</i> (L.) Crantz produces high-value oil when grown on marginal soils. However, its growth characteristics under waterlogged conditions are still unknown. This study evaluates the agronomic performance and genetic variability of 13 camelina genotypes subjected to waterlogging during the pre-flowering stage. The experiment simulated outdoor waterlogging conditions, contrasting two treatments: waterlogging conditions for 16 days, which began when the plants reached the inflorescence emergence stage on the main stem, and a well-drained treatment in two sowing dates (early and late). In the late sowing date, the interaction between waterlogging and higher temperatures determined that no genotype under waterlogging produced grain. A significant decrease in grain yield was observed across all genotypes due to waterlogging at the early sowing date, with a reduction of 87%. This decline was attributed to a reduction in silicle number and aboveground biomass. The study identified genetic variability, indicating the potential for breeding waterlogging-tolerant varieties. However, no intermediate measures (canopy leaf greenness and leaf temperature) were found to be associated with waterlogging behavior. The study underscores the importance of early sowing in mitigating the compounding effects of high temperatures and waterlogging. Future research should prioritize understanding the physiological factors, improve the ability to select tolerant genotypes, and evaluate strategies for crop integration within production systems.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70180","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144606604","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":"A pedo-isotopic approach to study sandy soils of the Brazilian Cerrado in Piauí State","authors":"Ronny Sobreira Barbosa,&nbsp;Ozeas S. Costa Jr.,&nbsp;Vanessa Martins,&nbsp;Yuri Jacques Agra Bezerra da Silva,&nbsp;Ygor Jacques Agra Bezerra da Silva,&nbsp;Paulo Henrique Dalto,&nbsp;Poliana Rocha D'Almeida Mota,&nbsp;Vinicius Vasconcelos,&nbsp;Gabriela Bielefeld Nardoto","doi":"10.1002/agg2.70176","DOIUrl":"10.1002/agg2.70176","url":null,"abstract":"<p>Sandy soils dominate Brazil's Cerrado biome in Piauí State, yet their organic carbon (OC) stabilization mechanisms and landscape-driven pedogenesis remain poorly understood. To clarify this topic, the present study proposes a pedo-isotopic approach to characterize six representative Brazilian Cerrado soils derived from sedimentary rocks in Piauí State and improve the understanding of the effects of landscape on the source of OC, dynamics of organic matter, mineralogy of the clay fraction, and stabilization of OC in this environment. To achieve these goals, we assessed the morphological, physical, chemical (including stable isotope ratios of carbon [δ¹³C] and nitrogen [δ¹⁵N]), and mineralogical attributes of samples collected from six soil profiles representing regions of the Parnaíba and São Francisco Sedimentary Basins. Results revealed that C₃ plants were the primary OC source (<i>δ</i>¹³C: −27‰ to −22‰), with plateau soils retaining more C₃-derived OC due to mineral-organic interactions. We also observed that Al₂O₃ in clay fractions correlated strongly with <i>δ</i>¹³C and <i>δ</i>¹⁵N, indicating its key role in OC stabilization. Another important finding was that the isotopic boundaries distinguished sub-environments, with plateau soils showing higher Al₂O₃ and OC stability than foot slopes. The absence of gibbsite highlighted unconventional pathways for Al₂O₃-OC associations in sandy soils. We conclude that the proposed pedo-isotopic approach is an accurate alternative method for investigating the effects of landscapes on the source and stabilization of OC, dynamics of organic matter, and clay mineralogy.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70176","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144606621","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":"Effects of liming on soil physical and chemical properties in Europe and North America: A review","authors":"Priscillar Wenyika,&nbsp;Rebecca Oiza Enesi,&nbsp;Linda Yuya Gorim,&nbsp;Miles Dyck","doi":"10.1002/agg2.70175","DOIUrl":"10.1002/agg2.70175","url":null,"abstract":"<p>Soil acidity is one of the major constraints limiting crop production worldwide. About 50% of the global arable land is acidic. Liming remains an effective strategy for soil acidity amelioration and improvement of soil fertility. The objective of this review was to summarize information on liming effects on soil physical and chemical properties in the North American and European contexts. We reviewed how different lime products influence soil pH and various soil processes that contribute to soil physical and chemical health. Our findings were that, when applied at appropriate rates, liming materials generally increased soil pH, cation exchange capacity (CEC), exchangeable calcium and magnesium, nutrient availability and reduced toxicities of aluminum (Al), manganese (Mn), and heavy metals. Many studies showed that liming modifies soil properties and processes both in the short- and long-term. While most studies reported improvements in nutrient availability, there were some differences in liming impacts on phosphorus (P) and potassium (K), mostly due to differences in soil type and composition. Liming improves structural properties including aggregate stability, soil friability, porosity, and water infiltration. Knowledge about liming impacts on soil physical and chemical properties is essential for optimizing liming rates to enhance soil health and improve productivity. Future studies should explore liming effects on CEC, associations of P and K with cations supplied by liming (e.g., Ca²⁺), and use of some waste materials as lime alternatives.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70175","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144606605","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":"Winter cover crop integration on soil nitrogen loss from a subtropical warm-season pasture field and its potential mitigation","authors":"Yili Meng,&nbsp;Jim J. Wang,&nbsp;Syam K. Dodla,&nbsp;Lewis A. Gaston,&nbsp;Zhuo Wei,&nbsp;Jiabing Li,&nbsp;Guillermo Scaglia,&nbsp;Jong-hwan Park","doi":"10.1002/agg2.70170","DOIUrl":"10.1002/agg2.70170","url":null,"abstract":"<p>Bermudagrass is a summer forage crop with high nitrogen (N) demand. Introducing winter cover crops may sustain bermudagrass yields with less fertilizer, reducing environmental N losses. Field trials and lab incubation were carried out to evaluate the effects of white clover (<i>Trifolium repens</i> L.) and ryegrass (<i>Lolium multiflorum</i>) as winter cover crops on soil N losses through runoff and nitrous oxide (N₂O) emissions in a subtropical bermudagrass (<i>Cynodon dactylon</i> L.) pasture field. The 2-year field experiment included five treatments: (1) no winter cover and N fertilization as a control (CLT), (2) white clover without N fertilization (WC) (where WC represents white clover), (3) white clover mixed with ryegrass without N fertilization (WCR), (4) white clover with half-rate N at 112 kg N ha⁻¹ year⁻¹ (WC112N), and (5) no cover crop with full-rate N 224 kg N ha⁻¹ year⁻¹ (224N). Results showed that without N fertilization, WC increased bermudagrass biomass by 38% compared to CLT, while WCR had a similar bermudagrass biomass yield to CLT. WC112N produced comparable bermudagrass biomass as 224N as well as reduced NH₄⁺ and NO₃⁻ runoff loss by 30%–35% and 11%–24%, respectively, compared than 224N, due to decreased runoff volume. There was no difference in N₂O emissions between 224N and WC112N. Laboratory incubation of white clover residue-amended soil showed that nitrification inhibitors dicyandiamide and 3,4-dimethylpyrazole phosphate lowered N₂O emission significantly, with a maximum reduction of 77%–91%, while urease inhibitor <i>N</i>-(<i>n</i>-butyl) thiophosphoric triamide had no effect. Overall, clover incorporation during the winter season helps in developing a low-N-input pasture production system, and nitrification inhibitors could be applied to mitigate associated N₂O losses from clover residue decomposition.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70170","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144598251","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":"Soil CO2 and N2O fluxes from simple and diversified crop rotations in the Central Corn Belt","authors":"Amitava Chatterjee,&nbsp;Bryan Emmett,&nbsp;Peter O'Brien,&nbsp;Marshall D. McDaniel,&nbsp;Thomas Sauer,&nbsp;Matt Liebman","doi":"10.1002/agg2.70171","DOIUrl":"10.1002/agg2.70171","url":null,"abstract":"<p>Agriculture in the United States has become highly productive but environmental consequences remain. Agriculture makes up a disproportionate share of net US greenhouse gas emissions compared to its contribution to the economy; the issue may be related to the decrease in crop diversity and reliance on synthetic fertilizer. In the US Corn Belt, crop rotational diversity is mostly limited to maize (<i>Zea mays</i>) and soybean (<i>Glycine max</i>). We compared soil carbon dioxide (CO₂) and nitrous oxide (N₂O) fluxes from a long-term experiment comparing the 2-year maize–soybean rotation to two other more diversified rotations: a 3-year maize–soybean–oat (<i>Avena sativa</i>)/red clover (<i>Trifolium pratense</i>) and a 4-year maize–soybean–oat/alfalfa (<i>Medicago sativa</i>]–alfalfa rotations. Both 3- and 4-year rotations also received composted cattle (<i>Bos taurus</i>) manure. We tested whether these more diversified rotations that replace a portion of the synthetic fertilizer with organic sources could decrease CO₂ and N₂O losses. Soil CO₂ fluxes in the 3- or 4-year rotations were 36% and 54% greater than in the 2-year rotation, driven by the maize phase, which might be due to the prior years’ leguminous crops (red cover or alfalfa), tillage, and manure. The crop phases within a rotation had significant effect on soil CO₂ (alfalfa &gt; oat &gt; maize = soybean) and N₂O (maize = alfalfa &gt; soybean = oat) fluxes. Soil temperature–crop phase interactions had more control over soil CO₂ fluxes than soil moisture. In the Central Corn Belt of the United States, replacing fertilizer-N supported maize–soybean rotation with diversified rotation and replacing inorganic N with an organic N source increased soil CO₂ flux but did not affect N₂O flux.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70171","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144598250","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":"The effect of desert locust on cropland by using vegetation indices: A case study of Gursum District, Oromia Region, Ethiopia","authors":"Taye Teshome Terefe,&nbsp;Karuturi Venkata Suryabhagavan,&nbsp;Tibebu Kassawmar","doi":"10.1002/agg2.70166","DOIUrl":"10.1002/agg2.70166","url":null,"abstract":"<p>Locust outbreaks worldwide frequently impact vast regions and millions of people. Effective mapping and monitoring of locust habitats, along with accurate outbreak prediction, are crucial for minimizing damage to crops and pasturelands. Gursum experienced its most severe desert locust infestation in 25 years during 2019 and 2020, resulting in food shortages. The present study was aimed to detect locust-related vegetation and cropland damage in Gursum District, Ethiopia, using vegetation indices and Sentinel-2A imagery. We analyzed vegetation phenology from two kebeles: Bilisuma (infested) and Oda Santana (non-infested). The NDVI mean values showed substantial differences in November 2019 between the affected and non-affected sites. Using data from 20 locust-affected and 20 non-affected cropland points, we found a strong correlation (<i>r</i>² &gt; 0.90) in NDVI and Green Chlorophyll Index values. Over 38% of croplands in Gursum District were severely damaged according to NDVI changes in 2019, a finding of great significance. These maps served to identify potential locust habitats and monitor agricultural practices, underlining the importance of our research in understanding and mitigating the impact of locust infestations. The outcome was found to be extremely useful for crop damage assessment and loss estimation to minimize the disaster effects in the district.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70166","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144589733","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 maize to different nutrient sources under different landscape positions in cereal mixed farming systems of tropical agroecosystems","authors":"Getachew Agegnehu,&nbsp;Zerfu Bazie,&nbsp;Gizaw Desta,&nbsp;Kassu Tadesse,&nbsp;Gizachew Legesse,&nbsp;Hirut Birhanu,&nbsp;Habtamu Getnet,&nbsp;Ayalew Addis,&nbsp;Tarekegn Yibabie,&nbsp;Beamlaku Alemayehu,&nbsp;Fayisa Bulo,&nbsp;Mulugeta Demiss,&nbsp;Tilahun Amede,&nbsp;Abiro Tigabie,&nbsp;John Wendt,&nbsp;Latha Nagarajan,&nbsp;Upendra Singh,&nbsp;Zachary P. Stewart","doi":"10.1002/agg2.70164","DOIUrl":"10.1002/agg2.70164","url":null,"abstract":"<p>Nutrient omission trials were conducted on farmers’ fields in 2020 and 2022. The experiment included nine treatments: three treatments with nitrogen (N), phosphorus (P), potassium (K), sulfur (S), zinc (Zn), and boron (B) as individual, blended, and compound fertilizer; four treatments with the omission of K, S, Zn, or B; NP-only; and control without any nutrient. Treatments were arranged in a randomized complete block design with three replications under foot slope (FS), mid-slope (MS), and hillslope (HS) positions. Results showed that soil properties and maize yield significantly varied among landscape positions, with substantial soil fertility and yield increasing trends from HS to FS position. The highest grain yield (6.18 t ha⁻¹) was recorded at the FS position, with the respective yield increments of 14% and 16% compared to the MS and HS positions. Applying all nutrients in blended form resulted in the highest grain yield (6.52 t ha⁻¹), but it was not significantly different from yields of compound and individual fertilizer forms. Applying all nutrients in blended form increased grain yield by 7.4% and 264.2% compared to the NP-only and the control, respectively, indicating the non-significant effects of K, S, Zn, and B on yield. Overall, N and P are the most yield-limiting nutrients for maize production, and site-specific NP fertilizer recommendations targeting landscape position are required to enhance nutrient use efficiency and sustainably intensify maize yield. Developing site-specific fertilizer recommendations advisory will enhance nutrient use efficiency, increase and sustain yield, and benefit farmers while improving soil and environmental quality.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70164","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144589735","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}