Agrosystems, Geosciences & Environment最新文献_第6页

IF 1.5

Agrosystems, Geosciences & Environment Pub Date : 2026-04-12

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IF 1.5

Agrosystems, Geosciences & Environment Pub Date : 2026-04-12

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Performance of an S-metolachlor capsule suspension for barnyardgrass control and crop tolerance in fenclorim-treated rice 异丙甲草胺胶囊悬浮液在氟氯林处理水稻中防治稗草和作物耐受性的性能

IF 1.5

Agrosystems, Geosciences & Environment Pub Date : 2026-04-12 DOI: 10.1002/agg2.70273

Samuel C. Noe, Jason K. Norsworthy, Tristen H. Avent, Trenton L. Roberts, Nick R. Bateman, Thomas R. Butts

{"title":"Performance of an S-metolachlor capsule suspension for barnyardgrass control and crop tolerance in fenclorim-treated rice","authors":"Samuel C. Noe, Jason K. Norsworthy, Tristen H. Avent, Trenton L. Roberts, Nick R. Bateman, Thomas R. Butts","doi":"10.1002/agg2.70273","DOIUrl":"https://doi.org/10.1002/agg2.70273","url":null,"abstract":"Barnyardgrass [Echinochloa crus-galli (L.) P. Beauv.] is the most problematic weed of delayed-flooded rice (Oryza sativa L.) systems in the mid-southern United States. Recent findings suggest that acetochlor can achieve effective barnyardgrass control in rice, but rice injury can occur with rainfall soon after application. The use of a herbicide safener such as fenclorim can reduce the risk of rice injury to acetochlor and possibly other chloroacetamide herbicides. An experiment was conducted on clay soil with S-metolachlor applied from 0 to 1.68 kg a.i. ha−1 with a fenclorim seed treatment at 0 and 2.5 g a.i. kg−1 seed at a delayed-preemergence (DPRE) application timing in rice. Another experiment was conducted on a silt loam soil with S-metolachlor applied from 0 to 0.84 kg ha−1 DPRE or one-leaf on fenclorim-treated rice. In 2022, on the clay soil, S-metolachlor at 0.56 kg ha−1 provided greater than 90% barnyardgrass control with less than 20% rice injury at 28 days after treatment. However, in 2023, wet conditions delayed the application, resulting in increased emergence of barnyardgrass before treatments could be applied. On a silt loam soil in 2023, crop safety improved when S-metolachlor was applied DPRE and rice was treated with fenclorim compared to the nontreated seed; however, only S-metolachlor at 0.28 kg ha−1 resulted in less than 20% injury to rice, comparable to microencapsulated (ME) acetochlor. While 0.28 kg ha−1 of S-metolachlor resulted in rice with similar tolerance to ME acetochlor, barnyardgrass control was less than 60%, which is not viable in rice.","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"9 2","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://acsess.onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70273","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147686023","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}

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Spatial relationship of turfgrass tissue nitrogen content and several vegetation indices on sand-capped golf course fairways 沙顶高尔夫球场球道草坪草组织氮含量与若干植被指标的空间关系

IF 1.5

Agrosystems, Geosciences & Environment Pub Date : 2026-04-09 DOI: 10.1002/agg2.70354

Madan Sapkota, Opeyemi E. Alabi, Weston W. Floyd, Sarah G. Hong, Dallas M. Williams, Briana M. Wyatt, A. Peyton Smith, Chase M. Straw

{"title":"Spatial relationship of turfgrass tissue nitrogen content and several vegetation indices on sand-capped golf course fairways","authors":"Madan Sapkota, Opeyemi E. Alabi, Weston W. Floyd, Sarah G. Hong, Dallas M. Williams, Briana M. Wyatt, A. Peyton Smith, Chase M. Straw","doi":"10.1002/agg2.70354","DOIUrl":"https://doi.org/10.1002/agg2.70354","url":null,"abstract":"Vegetation indices (VIs), such as normalized difference vegetation index (NDVI), are widely used to assess nitrogen (N) status in crop systems and are gaining interest in turfgrass management. However, most studies have been conducted in controlled settings, and their relevance under real-world golf course conditions remains unclear. This study evaluated spatial relationships between VIs and turfgrass tissue N on sand-capped fairways and explored how organic layer thickness, volumetric water content (VWC), and penetration resistance influenced those relationships. Data were collected in spring 2021 from four fairways, two hybrid bermudagrass and two zoysiagrass, at The Club at Carlton Woods in Houston, Texas. Multispectral unmanned aerial vehicle (UAV) imagery and ground-based data from the Toro Precision Sense 6000 were used alongside tissue and soil samples collected on a georeferenced 8.5 × 8.5 m grid. Spatial data were analyzed using correlation analysis and kriged maps to visualize variability across fairways. The UAV-based VIs were strongly interrelated (r = 0.54–0.93) and correlated with ground-based NDVI (r = 0.41–0.84) but showed weak or no correlation with tissue N (r = −0.27 to 0.25). In contrast, VIs were more closely related to VWC (r = 0.44–0.74) and organic layer thickness (r = 0.20–0.53), especially in zoysiagrass. These findings challenge assumptions from plot-based studies and highlight that environmental and management variability affect remote sensing reliability. Further research should explore whether integrating VIs with plant and soil data into predictive models or machine learning frameworks could improve monitoring and guide N-related decisions in sand-capped systems.","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"9 2","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://acsess.onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70354","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147685970","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}

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IF 1.5

Agrosystems, Geosciences & Environment Pub Date : 2026-04-09

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IF 1.5

Agrosystems, Geosciences & Environment Pub Date : 2026-04-09

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IF 1.5

Agrosystems, Geosciences & Environment Pub Date : 2026-04-06

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IF 1.5

Agrosystems, Geosciences & Environment Pub Date : 2026-04-06

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Effect of integrated inorganic and organic fertilizer on yield and yield components of maize at Bako Agricultural Research Center in Western Ethiopia 埃塞俄比亚西部Bako农业研究中心无机有机肥配施对玉米产量及产量构成的影响

IF 1.5

Agrosystems, Geosciences & Environment Pub Date : 2026-04-06 DOI: 10.1002/agg2.70345

Lami Gebrekidan, Lemma Wogi, Achalu Chimdi

{"title":"Effect of integrated inorganic and organic fertilizer on yield and yield components of maize at Bako Agricultural Research Center in Western Ethiopia","authors":"Lami Gebrekidan, Lemma Wogi, Achalu Chimdi","doi":"10.1002/agg2.70345","DOIUrl":"https://doi.org/10.1002/agg2.70345","url":null,"abstract":"This study aimed to evaluate the effects of the combined application of vermicompost and NPS fertilizer on maize (Zea mays L.) yield and yield components under low soil fertility conditions in western Ethiopia. A field experiment was conducted at Bako Agricultural Research Center using a randomized complete block design with three replications. Four levels of vermicompost (0, 2.32, 3.48, and 4.4 t ha−1) and four levels of NPS fertilizer (0, 50, 75, and 100 kg ha−1) were factorially combined. Key growth parameters, yield components, and economic returns were measured to evaluate treatment effects. Application of 4.64 t ha−1 vermicompost significantly increased ear height to 108.3 cm, while 100 kg ha−1 of NPS fertilizer produced the highest ear height of 108.56 cm. The combined treatment of 4.64 t ha−1 vermicompost and 100 kg ha−1 NPS fertilizer resulted in superior plant height, silking and tasseling time, grain yield, harvest index, aboveground biomass, and 1000-seed weight. Economic analysis identified 2.32 t ha−1 vermicompost combined with 100 kg ha−1 NPS as the most profitable treatment, with a net profit of 112,030 ETB and a marginal rate of return of 189.40%. Integrating vermicompost with NPS fertilizer significantly improves maize productivity and profitability under the prevailing soil fertility constraints in western Ethiopia. The combination of 2.32 t ha−1 vermicompost and 100 kg ha−1 NPS fertilizer is recommended to optimize maize yield and economic returns in the in study area and other similar agroecologies.","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"9 2","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://acsess.onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70345","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147686861","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}

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Effect of plant population on crop growth, floral biomass, and cannabinoid yield in field-grown hemp 植物种群对大田种植大麻作物生长、花生物量和大麻素产量的影响

IF 1.5

Agrosystems, Geosciences & Environment Pub Date : 2026-04-02 DOI: 10.1002/agg2.70348

Richard J. Roseberg, Jake Hoyman, Govinda Shrestha

{"title":"Effect of plant population on crop growth, floral biomass, and cannabinoid yield in field-grown hemp","authors":"Richard J. Roseberg, Jake Hoyman, Govinda Shrestha","doi":"10.1002/agg2.70348","DOIUrl":"https://doi.org/10.1002/agg2.70348","url":null,"abstract":"Hemp (Cannabis sativa L.) was recently re-legalized in the United States and cultivated for various purposes, including floral cannabidiol (CBD), grain, and fiber. Due to prohibition of hemp for a century, research supporting production guidelines, including plant density effects on CBD production, remains limited. This study determined the responses of field-grown full-season CBD hemp cultivars to plant stand densities ranging from 4000 to 86,000 plants ha−1 from 2021 to 2023 in a semiarid, irrigated environment in Southern Oregon. Crop measurements included primary, secondary (2° colas) and tertiary floral (3° colas) biomass, Stem+Leaf biomass, cannabinoid concentration, and cannabinoid yield. Over an eightfold increase in stand density each year, plant morphology clearly changed. Stem+Leaf biomass per plant decreased by about fourfold, expressed as smaller plants having fewer side branches. The biomass of 2° colas decreased by about fivefold per plant, while 3° cola biomass also decreased to nearly zero at the highest densities. The primary flower size varied little with density. Since floral CBD concentration was almost constant at all stand densities, the CBD yield per hectare was controlled by the yield of floral material. While the per-plant biomass of floral material decreased as density increased, the simultaneous increase in plant number per hectare resulted in an apparent CBD “yield plateau” at a density of about 50,000–60,000 plant ha−1 for Stella and about 70,000–80,000 plant ha−1 for Lifter. These were 10–15 times the densities commonly seen in production fields in southern Oregon.","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"9 2","pages":""},"PeriodicalIF":1.5,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://acsess.onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70348","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147686792","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}

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