Agrosystems, Geosciences & Environment最新文献

{"title":"Applicability of soil pore size distribution derived from digital microscopy images to determination of water retention curve","authors":"Yuki Hayashi","doi":"10.1002/agg2.70049","DOIUrl":"https://doi.org/10.1002/agg2.70049","url":null,"abstract":"<p>Information on the water retention curve (WRC) is required for the numerical simulation of water flow; however, its acquisition is time- and cost-consuming. In this study, the applicability of two-dimensional (2D) image of soil taken by a digital microscope to WRC measurement was assessed. For this purpose, four undisturbed soil samples were collected at surface (10–15 cm) and undersurface (22.5–27.5 cm) depths to acquire 2D images and measure WRCs from the conventional method, pressure plate method. To derive the WRCs, soil pore-size distribution in soil images was manually extracted using the following three methods: In Methods 1 and 2, the fuzzy region and the dark region, respectively, in the image were assumed to be a soil pore, and in Method 3, the pore boundary, being assumed to be a bright part, connected the lines and divided the region into pores. Method 3 had much large-size pores (&gt;75 µm in radius) at deeper depths than at surface depths. This trend was the same as the pressure plate method. The WRCs in three methods were well fitted to the lognormal model. In all methods, the values of parameter of <i>θ</i>_e were larger at surface layers than at deeper depths, of which similar result was also seen in the pressure plate method. We discussed applicability of the parameters. It is effective to determine <i>θ</i>_e from the pressure plate method and the other parameters (<i>ψ</i>_m and <i>σ</i>) from the image-based method. From those analyses, it could be said to prove to obtain WRC from an image-based method.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70049","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362624","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":"Approximately 15% of Miscanthus yield is lost at current commercial cutting heights in Iowa","authors":"Bryan Petersen,&nbsp;Shah-Al Emran,&nbsp;Fernando Miguez,&nbsp;Emily Heaton,&nbsp;Andy VanLoocke","doi":"10.1002/agg2.70039","DOIUrl":"https://doi.org/10.1002/agg2.70039","url":null,"abstract":"<p>Various works have quantitatively characterized the effects of environmental and management factors on <i>Miscanthus</i> <span></span><math>\u0000 <semantics>\u0000 <mo>×</mo>\u0000 <annotation>$times$</annotation>\u0000 </semantics></math> <i>giganteus</i> Greef et Deu (<i>mxg</i>) yield and, therefore, anticipated land requirement per unit production. However, little work has addressed the effects of cutting height, which may significantly contribute to the difference between the standing aboveground biomass at harvest (i.e., biological yield) and harvested yield. This study quantitatively characterized the effect of cutting height using a replicated nitrogen trial of a 5-year-old <i>mxg</i> stand in southeast Iowa and related this information to observations of cutting height in nearby commercial fields. Nitrogen fertilizer did not significantly change the relationship of the stem segment mass to length, and overall, a 1-cm stem segment contributes 0.5% of the total stem biomass within the bottom 44 cm of the stem. This results in an average harvest loss of 15% of the aboveground standing biomass when cutting at 30 cm, typically seen in commercial <i>mxg</i> fields in eastern Iowa. Cutting height should be considered when accurately predicting commercial <i>mxg</i> harvest yields and changes in soil organic carbon in a commercial <i>mxg</i> agroecosystem.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70039","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121018","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":"Paddy rice traits estimation under varying management strategies using UAV technology","authors":"Daniel Muhindo,&nbsp;Joyce J. Lelei,&nbsp;Wivine Munyahali,&nbsp;Landry Cizungu,&nbsp;Sebastian Doetterl,&nbsp;Florian Wilken,&nbsp;Espoir Bagula,&nbsp;Nathan Okole,&nbsp;Boris Rewald,&nbsp;Samuel Mwonga","doi":"10.1002/agg2.70047","DOIUrl":"https://doi.org/10.1002/agg2.70047","url":null,"abstract":"<p>Timely crop monitoring and yield prediction are essential in guiding management decision making. The aim of the study was to estimate the agronomic traits of paddy rice (<i>Oryza sativa</i> L.) using unmanned aerial vehicle (UAV)-multispectral imaging. A randomized complete block design field experiment with a split–split plot arrangement was set up in the Ruzizi plain, Democratic Republic of Congo (DRC). Spectral imaging data were collected at rice tillering and panicle initiation stages. Predictive analysis of rice agronomic traits was performed using linear and decision tree-based machine learning techniques. Paddy rice trait predictions were critically sensitive to the timing of image acquisition but not largely affected by the model. The most accurate predictions were made at rice panicle initiation stage, with <i>R</i>² values of 0.62, 0.65, and 0.75 for yield, aboveground biomass, and plant nitrogen (N) uptake, respectively. The visible atmospherically resistant index (VARI), modified chlorophyll absorption in reflective index, and ratio vegetation index, along with near infrared and green bands, played a critical role in predicting paddy rice N uptake and yield. The same spectral features associated with crop height and canopy data were essential for predicting paddy rice aboveground biomass. UAV-multispectral data were able to assess agricultural intensification strategies at field/landscape scale irrespective of soil types, watering regimes, and cultivars. Special consideration should be attributed to VARI, as it enables economical prediction of paddy rice traits. The UAV technologies are therefore reliable tools for monitoring rice production and can be applied in agricultural extension in the DRC.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70047","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121017","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 combination of irrigation regime and water cutoff date increases the yield and water use efficiency of castor bean (Ricinus communis L.)","authors":"Alberto Mario Arroyo Avilez,&nbsp;Andres Felipe Gaona Acevedo,&nbsp;Luan Brioschi Giovanelli,&nbsp;João Carlos Cury Saad,&nbsp;Ícaro Monteiro Galvão,&nbsp;João Luis Zocoler,&nbsp;Mauricio Dutra Zanotto","doi":"10.1002/agg2.70033","DOIUrl":"https://doi.org/10.1002/agg2.70033","url":null,"abstract":"<p>Castor bean (<i>Ricinus communis</i> L.) is a fibrous and fast-growing plant with increasing economic importance due to its ability to generate energy and in the pharmaceutical and chemical industries. This research aimed to determine the best combination of irrigation regime and irrigation cutoff date (ICD) that maximizes grain and oil yields and water use efficiency (WUE) in the castor bean hybrid AG IMA 110204. The experiments were conducted in greenhouses in randomized blocks using subdivided plots and four replicates. The plots were allocated to five irrigation regimes based on soil water tension: 20, 30, 40, 50, and 60 kPa, corresponding to I1, I2, I3, I4, and I5, respectively. The subplots show the four ICDs: 120, 130, 140, and 150 days after sowing (DAS). The I1, I2, and I3 treatments showed the highest values and did not differ in the two cycles for the following variables: weight of 100 grains, grain yield, oil yield, WUE of the grain (WUE-grains), and WUE of the oil (WUE-oil). When the irrigation cutoff was 120 DAS, in both cycles, the water regimes I1, I2, and I3 presented the highest values and did not differ in terms of grain or oil yields or WUE-grains or WUE-oil. Higher grain and oil yields with lower water demand for castor bean were obtained with the combination of 40 kPa soil water tension to define the time of irrigation and the irrigation cutoff at 120 DAS.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70033","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143119649","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":"Impact of climate change stressors—temperature, CO2, and UV-B—on early growth and development of different cover crop species","authors":"Tulsi P. Kharel,&nbsp;K. Raja Reddy,&nbsp;Akanksha Sehgal,&nbsp;Nisarga Kodadinne,&nbsp;Raju Bheemanahalli,&nbsp;Ammar B. Bhandari,&nbsp;Krishna N. Reddy,&nbsp;Wei Gao","doi":"10.1002/agg2.70037","DOIUrl":"https://doi.org/10.1002/agg2.70037","url":null,"abstract":"<p>Different cover crop (CC) species may respond differently to the projected climate change scenarios. A study was carried out in a controlled environmental chamber to evaluate early season growth and development of five CC species: cereal rye (<i>Secale cereale</i> L.), triticale (x <i>Triticosecale</i> Wittmack), winter wheat (<i>Triticum aestivum</i> L.), crimson clover (<i>Trifolium incarnatum</i> L.), and mustard (<i>Brassica juncea</i>). Treatments consisted of two levels of carbon dioxide (CO₂) (420 and 720 ppm), ultraviolet-B (UV-B) radiation (0 and 10 kJ m⁻² day⁻¹), and temperatures (29/21°C and 19/11°C day/night), and their combinations. Root, shoot, and physiological parameters were recorded, and a combined stress response index (CSRI) was derived. Results indicated that higher CO₂ (+CO₂) had a net positive effect on all five CC species, with CSRI values ranging from 1.0 to 5.1. Conversely, higher UV-B radiation (+UV) had a net negative impact, with CSRI values ranging from −2.9 to −7.6. The most favorable environment for all CC species was the combination of increased fall temperature and elevated CO₂ (+T+ CO₂). The negative impact of +UV was mitigated in an elevated CO₂ and a high temperature environment, mimicking fall temperatures in the US Midsouth. Among the CC species, mustard was the most responsive, with a 151% increase in root and shoot combined dry weight under the +T+ CO₂ treatment and an 86% decrease under the +UV treatment. Rye and triticale were the least impacted by the imposed climatic stressors. These results are of particular interest to the agricultural and environmental science community as they offer insights into developing and selecting CC species with adaptable and desirable morphological characteristics in anticipation of a changing climate.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70037","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117536","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":"Economic value of dual-purpose cowpea as affected by variety, fertilizer, and environment","authors":"Augustine K. Obour,&nbsp;Aliou Faye,&nbsp;Tobi Moriaque Akplo,&nbsp;Zachary P. Stewart,&nbsp;Doohong Min,&nbsp;P. V. Vara Prasad,&nbsp;Yared Assefa","doi":"10.1002/agg2.70045","DOIUrl":"https://doi.org/10.1002/agg2.70045","url":null,"abstract":"<p>Across the semiarid regions of West Africa, cowpea (<i>Vigna unguiculata</i> (L.) Walp) varieties grown by farmers are either grain- or forage-only, and often fields are not fertilized. Information regarding profitability of dual-purpose over traditional varieties and fertilizer application in cowpea production system is limited. The main objective of this study was to quantify the economic value of newly released dual-purpose and forage cowpea varieties and fertilizer inputs across the Senegalese peanut basin. This field study was conducted across three locations in Senegal (Bambey, Boulel, and Darou Mousty) in 2021 and 2022. Treatments were 20 cowpea varieties in the main plot and two levels of fertilizer (an unfertilized control and fertilized) in the subplot. Cowpea varieties E-BC4STR1, E-BC4STR5, E-BC4STR11, Kelle, and Melakh had relatively greater grain yields (average 429–474 kg ha⁻¹) in all environments. Forage varieties 66-35F and 58-74F produced the most forage (average 2353 and 1717 kg ha⁻¹) yields across environments. Fertilizer-NPK application increased grain yield by 22%–40% in most environments. Unlike grain yield, varietal effects on forage yields occurred only with fertilizer application. Dual-purpose cowpea varieties E-BC4STR1, E-BC4STR2, E-BC4STR5, and E-BC4STR11 had a stable, significant economic value in our study compared with grain-only variety Yacine (traditional variety) or forage variety 66-35F. Fertilizer-NPK increased net revenue in four out of six environments. We conclude that using dual-purpose cowpea varieties provided significant economic advantage over traditional varieties, and application of fertilizer further increased the economic value. However, further studies are needed to determine the economically optimal fertilizer rate.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70045","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117276","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 flood conditions on lake water quality in an agricultural watershed with multiple conservation practices","authors":"Richard E. Lizotte Jr.,&nbsp;Lucas J. Heintzman,&nbsp;Lindsey M. Witthaus,&nbsp;Martin A. Locke,&nbsp;Matthew T. Moore","doi":"10.1002/agg2.70046","DOIUrl":"https://doi.org/10.1002/agg2.70046","url":null,"abstract":"<p>This study measured 17 surface water quality (WQ) parameters in a 731 ha Conservation Effects Assessment Project watershed, Beasley Lake, in Mississippi, under varying flooding conditions from 2008 to 2022. To assess flooding impacts on lake WQ, data from before and after flood events were compared among three flood-stage categories: minor flooding at 30.95 m mean sea level (MSL), 99.1 ha of the watershed inundated affecting 27.9 ha under conservation practices (CPs); moderate flooding at 32.17 m MSL, 235.1 ha of the watershed inundated affecting 69.2 ha under CPs; and major flooding at 32.78 m MSL, 331.8 ha of the watershed inundated affecting 87.0 ha under CPs. During minor flood events, only nitrite significantly increased (82%; <i>p</i> &lt; 0.05) from pre- to post-flood conditions. For moderate flood events, dissolved solids decreased 21%, whereas suspended solids increased 259%, and most nutrients increased from 33% to 199% (ammonium) except nitrate and N:P ratios. With major flooding, dissolved solids also decreased 22% and suspended solids increased 237%, with increased phosphorus from 25% to 164% (orthophosphate) and decreased N:P (36%). Correlation analysis showed greater flood duration (in days) and magnitude (as river stage) increased suspended solids and nutrient concentrations. Weaker relationships were observed with watershed and CP area inundation and WQ. Results will provide landowners and action agencies with predictive changes in WQ parameters based on flooding stage and potential impositions of effects through watershed areas that coincide with CPs.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70046","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117560","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":"Fertilizer selection influences soil microbial communities in alluvial and peat soils of the tropics","authors":"Dwi P. Widiastuti,&nbsp;Antisar Afkairin,&nbsp;Mary Stromberger,&nbsp;Sutarman Gafur,&nbsp;Jessica G. Davis","doi":"10.1002/agg2.70040","DOIUrl":"https://doi.org/10.1002/agg2.70040","url":null,"abstract":"<p>Fertilizer choices can alter soil microbial communities. The objective of this study was to determine the effects of urea, chicken manure, and <i>Azolla</i> fertilizers on soil microbial communities in alluvial and peat soils in West Kalimantan, Indonesia. Five nitrogen (N) fertilizer treatments were applied to spinach (<i>Amaranthus tricolor)</i> grown on both soil types: control (0 kg N ha⁻¹), urea (23 kg N ha⁻¹), <i>Azolla</i> applied at the same urea-N rate (<i>Azolla</i>-U, 23 kg N ha⁻¹), chicken manure (108 kg N ha⁻¹), and <i>Azolla</i> applied at the same manure-N rate (<i>Azolla</i>-M, 108 kg N ha⁻¹). Microbial community structure was determined from freeze-dried soil samples (0–20 cm deep) by the ester-linked fatty acid methyl ester (EL-FAME) method and analyzed by gas chromatography–mass spectrometry. Treatment effects were dependent upon soil type. In peat soil, fertilizer treatment influenced the abundance of Gram-positive bacteria, whereas in alluvial soil, fertilizer affected the population of Gram-negative bacteria. In alluvial soil, <i>Azolla</i>-M increased EL-FAMEs for total microbial biomass, Gram-negative bacteria, and arbuscular mycorrhizal fungi. On the other hand, in the peat soil, <i>Azolla</i>-M had a significant effect on altering the microbial community structure toward greater fungal biomass, while urea increased the number of Gram-positive bacteria and actinomycetes. <i>Azolla</i>-M altered the Gram-positive:Gram-negative ratio and reduced the Stress 2 ratio in the peat soil, but the manure and the lower application of Azolla (<i>Azolla</i>-U) did not. <i>Azolla</i>-M may diminish stress encountered by the microbial community from unfavorable environmental conditions.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70040","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143115401","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 organic carbon in tropical shade coffee agroforestry following land-use changes in Mozambique","authors":"Tarquinio Mateus Magalhães,&nbsp;Rafael Bohn Reckziegel,&nbsp;João Paulino","doi":"10.1002/agg2.70043","DOIUrl":"https://doi.org/10.1002/agg2.70043","url":null,"abstract":"<p>Coffee (<i>Coffea</i> L.) agroforestry systems (CAFS) and wooded grasslands (WG) have been pointed out as having high soil organic carbon (SOC) storage potential compared to monoculture systems. Studies analyzing the response of soil bulk density (BD) and SOC to the conversion of WG to slash-and-burn agriculture (SBA) and to CAFS are lacking in southern Africa. This study was conducted in the buffer zone of Gorongosa National Park (Mozambique), where depth profiles of BD and SOC were estimated to 0- to 100-cm soil depth in WG, SBA, and CAFS sites, with coffee shrubs aged 3, 5, and 8 years after planting. The stratification ratio (SR) was used as an indicator of soil quality and recovery from disturbance. BD and SOC stocks varied significantly among land use systems and coffee ages only in the surface soil layer (0–20 cm). SOC stocks of the surface soil and SR increased with increasing coffee age. Compared to SBA, significant increases in SOC stocks were only observed 5 years after implementation of CAFS. WG conversion to SBA did not alter SOC stocks in any soil layer; however, it led to decreased SR. Surface SOC stocks were 25.6 and 33.7 Mg ha⁻¹ in WG and SBA, and 28.0, 41.9, and 61.1 Mg ha⁻¹ in 3- and 5- and 8-year-old CAFS (mean SOC accumulation of 6.65 Mg ha⁻¹year⁻¹). This study reveals that CAFS have the potential to increase belowground carbon sequestration when compared to SBA and WG over comparable soils, making it a practical option for climate change mitigation.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70043","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143115402","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":"Post-rice soybeans and peanuts differ in performance, water use, and water-use efficiency in the rainfed lowlands","authors":"S. Vongthilard,&nbsp;T. Inthavong,&nbsp;P. Sengxua,&nbsp;P. Eberbach,&nbsp;D. Harnpichitvitaya,&nbsp;L. J. Wade","doi":"10.1002/agg2.70041","DOIUrl":"https://doi.org/10.1002/agg2.70041","url":null,"abstract":"<p>This study examined patterns of water use and water-use efficiency in soybeans (<i>Glycine max</i>) and peanuts (<i>Arachis hypogaea</i>), for which data are rare, to assess their suitability as post-rice (<i>Oryza sativa</i> L.) crops in the rainfed lowlands. A field experiment was conducted at Pakse in southern Lao PDR, comprising two irrigation regimes (weekly and as needed), three surface mulch treatments (nil, straw, and plastic), and two species (soybeans, peanuts), in a split–split design with three replicates. Volumetric soil water content was measured using time-domain reflectometry. Water deficit was more severe under as needed irrigation, Nil cover, in soybeans, and late in the life cycle. Water use was highest in soybeans under nil cover and weekly irrigation (432 mm) and was lowest in peanuts under plastic cover and as needed irrigation (225 mm). Soybeans were responsive in plant height (41.5–62.7 cm), while peanuts were responsive in grain yield (1.05–1.81 Mg ha⁻¹). Water-use efficiency was lowest in soybeans under nil cover and weekly irrigation (2.48 kg ha⁻¹ mm⁻¹), and highest in peanuts under plastic cover and as needed irrigation (8.04 kg ha⁻¹ mm⁻¹). The paper concludes that peanuts should have a role as a post-rice crop in the rainfed lowlands, with access to supplementary irrigation.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70041","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143114802","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}