Agricultural & Environmental Letters最新文献_第10页

Rapid and inexpensive assessment of soil total iron using Nix Pro color sensor 快速和廉价的评估土壤总铁使用Nix Pro颜色传感器

IF 2.6 4区农林科学

Agricultural & Environmental Letters Pub Date : 2021-07-12 DOI: 10.1002/ael2.20050

Gaurav Jha, Debjani Sihi, Biswanath Dari, Harpreet Kaur, Mallika Arudi Nocco, April Ulery, Kevin Lombard

{"title":"Rapid and inexpensive assessment of soil total iron using Nix Pro color sensor","authors":"Gaurav Jha, Debjani Sihi, Biswanath Dari, Harpreet Kaur, Mallika Arudi Nocco, April Ulery, Kevin Lombard","doi":"10.1002/ael2.20050","DOIUrl":"10.1002/ael2.20050","url":null,"abstract":"In this study, an inexpensive Nix Pro (Nix Sensor Ltd.) color sensor was used to develop prediction models for soil iron (Fe) content. Thirty-eight soil samples were collected from five agricultural fields across the Animas watershed to develop and validate soil Fe prediction models. We used color space models to develop three different parameter sets for Fe prediction with Nix Pro. The different color space sets were used to develop three new predictive models for Nix Pro-based Fe content against the lab-based inductively coupled plasma analyzed Fe content. The model performances were assessed using the coefficient of determination, root mean square error, and model p-value. Three models (International Commission on Illumination's lightness, ±a axis (redness to greenness), and ± b axis (yellowness to blueness) [CIEL*a*b]; red, green, blue [RGB]; and cyan, magenta, yellow, key [black] [CMYK]) were significant in predicting the Fe content using colorimetric variables with R2 ranging from 0.79 to 0.81. The mean square prediction error (MSPE) and Kling–Gupta efficiency (KGE) Index were calculated to validate models and CMYK was predicted to be a better model (MSPE = 0.13; KGE = 0.601) than CIEL*a*b and RGB models. The results suggest Nix Pro is useful in predicting soil Fe content.","PeriodicalId":48502,"journal":{"name":"Agricultural & Environmental Letters","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/ael2.20050","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44888619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 9

Camera illustration of Indicator of Reduction in Soils (IRIS) reduction dynamics 土壤还原指标(IRIS)还原动态的相机图示

IF 2.6 4区农林科学

Agricultural & Environmental Letters Pub Date : 2021-07-02 DOI: 10.1002/ael2.20051

Olivia Victoria LeFevre, Thorsten Knappenberger, Joey Nathan Shaw, Yaniv Olshansky

引用次数: 0

Soil acidification in a continuous cotton production system 连续棉花生产系统中土壤酸化

IF 2.6 4区农林科学

Agricultural & Environmental Letters Pub Date : 2021-06-17 DOI: 10.1002/ael2.20048

Rajan Ghimire, Megha N. Parajulee, Pramod Acharya, Dol P. Dhakal, Abdul Hakeem, Katie L. Lewis

引用次数: 3

Toward a standardized statistical methodology comparing optimum nitrogen rates among management practices: A bootstrapping approach 在管理实践中比较最佳氮肥率的标准化统计方法:自举方法

IF 2.6 4区农林科学

Agricultural & Environmental Letters Pub Date : 2021-06-15 DOI: 10.1002/ael2.20045

Hannah R. Francis, Ting Fung Ma, Matthew D. Ruark

{"title":"Toward a standardized statistical methodology comparing optimum nitrogen rates among management practices: A bootstrapping approach","authors":"Hannah R. Francis, Ting Fung Ma, Matthew D. Ruark","doi":"10.1002/ael2.20045","DOIUrl":"10.1002/ael2.20045","url":null,"abstract":"There are a range of approaches to compare differences between or among optimum nitrogen (N) fertilizer rates resulting from different management practices; however, this goal lacks statistical standardization. To provide the statistical rigor needed to give clear recommendations for greater or less N need based on specific management practices, we propose a bootstrapping approach that resamples residuals with replacement. While bootstrapping is not new to data processing in agronomic fields, we provide an example of how to conduct residual-resampled bootstrapping with nonlinear regression to identify differences in response curves, optimum N rates, and maximum yields using the FertBoot package in R. Our example dataset provides clear evidence of the value of the bootstrapping approach, as it can aid in determining significant differences between even relatively small differences in optimum N rate. We encourage adoption of this approach as a way to accurately evaluate differences in optimum fertilizer levels between or among treatments to better inform future agronomic decision making.","PeriodicalId":48502,"journal":{"name":"Agricultural & Environmental Letters","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/ael2.20045","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48099683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Farmer perspectives on benefits of and barriers to extended crop rotations in Iowa, USA 美国爱荷华州农民对扩大作物轮作的好处和障碍的看法

IF 2.6 4区农林科学

Agricultural & Environmental Letters Pub Date : 2021-06-09 DOI: 10.1002/ael2.20049

David A. Weisberger, Marshall D. McDaniel, J. G. Arbuckle, Matt Liebman

{"title":"Farmer perspectives on benefits of and barriers to extended crop rotations in Iowa, USA","authors":"David A. Weisberger, Marshall D. McDaniel, J. G. Arbuckle, Matt Liebman","doi":"10.1002/ael2.20049","DOIUrl":"10.1002/ael2.20049","url":null,"abstract":"The highly specialized maize (Zea mays L.) and soybean [Glycine max (L.) Merr.] production system that dominates midwestern U.S. agriculture has led to widespread on-farm and off-farm degradation of and damage to natural resources. The practice of extending maize–soybean rotations with small grains and forages has great potential to balance production and environmental goals, but adoption of these practices is low. Because little is known about farmers’ perspectives on extended rotations, we conducted social survey research with Iowa farmers to address this knowledge gap. Results show that farmers understand the potential benefits of extended rotations using small grains, but they perceive major barriers to use. The highest-rated barriers were structural, such as lack of markets. Structural barriers cannot be easily addressed by individual farmers, indicating that efforts to address negative impacts of specialized commodity production through extended rotations with small grains will require transformative changes in agri-food policies, programs, and ultimately markets.","PeriodicalId":48502,"journal":{"name":"Agricultural & Environmental Letters","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2021-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/ael2.20049","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42272044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 7

Prototype for developing SNP markers from GWAS and biparental QTL for rice panicle and grain traits 利用GWAS和双亲本QTL开发水稻穗粒性状SNP标记的原型

IF 2.6 4区农林科学

Agricultural & Environmental Letters Pub Date : 2021-06-05 DOI: 10.1002/ael2.20047

Georgia C. Eizenga, Aaron K. Jackson, Jeremy D. Edwards

引用次数: 4

Thanks to our 2020 reviewers 感谢我们2020年的审稿人

IF 2.6 4区农林科学

Agricultural & Environmental Letters Pub Date : 2021-05-25 DOI: 10.1002/ael2.20046

引用次数: 0

Production of napiergrass as a forage and bioenergy feedstock with swine-lagoon effluent 利用猪泻湖污水生产作为饲料和生物能源原料的纳皮草

IF 2.6 4区农林科学

Agricultural & Environmental Letters Pub Date : 2021-05-11 DOI: 10.1002/ael2.20044

John J. Read, David J. Lang, William F. Anderson

引用次数: 1

Introduction to P-TRAP software for designing phosphorus removal structures 介绍P-TRAP软件设计除磷结构

IF 2.6 4区农林科学

Agricultural & Environmental Letters Pub Date : 2021-04-26 DOI: 10.1002/ael2.20043

Chad J. Penn, James Frankenberger, Stanley Livingston

{"title":"Introduction to P-TRAP software for designing phosphorus removal structures","authors":"Chad J. Penn, James Frankenberger, Stanley Livingston","doi":"10.1002/ael2.20043","DOIUrl":"10.1002/ael2.20043","url":null,"abstract":"Phosphorus (P) removal structures are a new best management practice for filtering dissolved P in non-point drainage from legacy P soils through use of P sorption materials (PSMs). Structures must be designed according to characteristics of the site (hydrology and constraints) and PSMs to be utilized, as well as user-defined goals (P removal, lifetime, and flow rate), making it a cumbersome process. A freely available P Transport Reduction App (P-TRAP) allows users to quickly produce a custom design or evaluate a hypothetical or existing structure. The software includes a library of P removal flow-through curves for many different PSMs conducted under various conditions of inflow P concentration and retention time. Design output includes the necessary PSM mass and orientation, pipe requirement, and a table of annual P removal. The software enables conservationists and engineers to quickly compare cost and efficiency among possible designs.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture>Phosphorus Transport Reduction App (P-Trap) software is used to evaluate and design site-specific P removal structures based on (a) user inputs regarding site and P sorption material (PSM) characteristics and (b) P removal performance goals.\u0000 </div>\u0000 </figure>","PeriodicalId":48502,"journal":{"name":"Agricultural & Environmental Letters","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/ael2.20043","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45149563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 6

Quantifying the time-specific kinetic energy of simulated rainfall using a dynamic rain gauge system 利用动态雨量计系统量化模拟降雨的时间比动能

IF 2.6 4区农林科学

Agricultural & Environmental Letters Pub Date : 2021-03-25 DOI: 10.1002/ael2.20042

Kenneth M. Wacha, Chi-hua Huang, Peter L. O'Brien, Athanasios N. Papanicolaou, Jerry L. Hatfield

{"title":"Quantifying the time-specific kinetic energy of simulated rainfall using a dynamic rain gauge system","authors":"Kenneth M. Wacha, Chi-hua Huang, Peter L. O'Brien, Athanasios N. Papanicolaou, Jerry L. Hatfield","doi":"10.1002/ael2.20042","DOIUrl":"10.1002/ael2.20042","url":null,"abstract":"Raindrop impact derives from the kinetic energy of falling raindrops. Determining the kinetic energy of rainfall requires the size distribution and terminal velocity of raindrops, which necessitates complex instrumentation. To avoid this, empirical relations have been developed that relate rainfall intensity and the rate of kinetic energy, i.e., time-specific kinetic energy (KEtime). In this study, a dynamic rain gauge system (DRGS) was used to quantify the KEtime generated by a rainfall simulator without need of measuring raindrop size distributions or impact velocities. In a series of 10 rainfall tests, the KEtime and rainfall intensity were 860.9 (±88.6) J m2 h−1 and 72.1 (±1.9) mm h−1, respectively. Estimated KEtime was found to agree well with the power-law relation presented by Petrů and Kalibová for high-intensity simulated rainfall, which are the conditions when higher deviations occur. The DRGS may be a useful tool in quantifying the KEtime of rainfall simulators in hopes to better understand raindrop impact mechanisms.","PeriodicalId":48502,"journal":{"name":"Agricultural & Environmental Letters","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2021-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/ael2.20042","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43066538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2