@article{camacho_faundez-urbina_amoozegar_gannon_heitman_leon_2023, title={Subsurface Lateral Solute Transport in Turfgrass}, volume={13}, ISSN={["2073-4395"]}, url={https://doi.org/10.3390/agronomy13030903}, DOI={10.3390/agronomy13030903}, abstractNote={Turfgrass managers have suspected that runoff-independent movement of herbicides and fertilizers is partially responsible for uneven turfgrass quality in sloped areas. We hypothesized that subsurface lateral solute transport might explain this phenomenon especially in areas with abrupt textural changes between surface and subsurface horizons. A study was conducted to track solute transport using bromide (Br−), a conservative tracer, as a proxy of turfgrass soil inputs. Field data confirmed the subsurface lateral movement of Br− following the soil slope direction, which advanced along the boundary between soil horizons over time. A model based on field data indicated that subsurface lateral movement is a mechanism that can transport fertilizers and herbicides away from the application area after they have been incorporated within the soil, and those solutes could accumulate and resurface downslope. Our results demonstrate that subsurface lateral transport of solutes, commonly ignored in risk assessment, can be an important process for off-target movement of fertilizers and pesticides within soils and turfgrass systems in sloped urban and recreational landscapes.}, number={3}, journal={AGRONOMY-BASEL}, author={Camacho, Manuel E. and Faundez-Urbina, Carlos A. and Amoozegar, Aziz and Gannon, Travis W. and Heitman, Joshua L. and Leon, Ramon G.}, year={2023}, month={Mar} }
 @article{camacho_gannon_ahmed_mulvaney_heitman_amoozegar_leon_2022, title={Evaluation of imazapic and flumioxazin carryover risk for Carinata (Brassica carinata) establishment}, volume={5}, ISSN={["1550-2759"]}, url={https://doi.org/10.1017/wsc.2022.27}, DOI={10.1017/wsc.2022.27}, abstractNote={Abstract}, journal={WEED SCIENCE}, publisher={Cambridge University Press (CUP)}, author={Camacho, Manuel E. and Gannon, Travis W. and Ahmed, Khalied A. and Mulvaney, Michael J. and Heitman, Joshua L. and Amoozegar, Aziz and Leon, Ramon G.}, year={2022}, month={May} }
 @article{camacho_mata_barrantes-viquez_alvarado_2021, title={Morphology and characteristics of eight Oxisols in contrasting landscapes of Costa Rica}, volume={197}, ISSN={["1872-6887"]}, DOI={10.1016/j.catena.2020.104992}, abstractNote={Oxisols have been previously reported in Costa Rica. However, few studies provided specific data to corroborate their presence and explain their genesis under different soil-forming factors. This study was performed with the aim to confirm Oxisols occurrence in different landscapes and parent materials in Costa Rica. Eight pedons were sampled, described, characterized, and classified according to Soil Taxonomy in five landscapes. All pedons studied presented clay contents above 40% in surface horizons. Subsurface horizons presented red colors, high contents of low-activity clay minerals with cation exchange capacity values at pH 7 (CEC7) less than 16 cmolc kg−1 clay and less than 9.6% weatherable minerals in the sand fraction. The suborders Ustox, Udox and Perox were identified. Among the Ustox, three contrasting subgroups were identified: Kandiustalfic Eustrustox, Plinthic Kandiustox, and Anionic Acrustox. Conversely, soils classified into the suborder Udox presented the same great group: Kandiudox; with three subgroups identified: Typic Kandiudox, Plinthic Kandiudox, and Rhodic Kandiudox. In addition, one pedon was classified into the suborder Perox, with the subgroup Andic Haploperox. The diversity in geologic materials (basaltic, pyroclastic, and sedimentary rocks), geomorphology (mountains, plains, dissected volcanic cones, and Quaternary alluvial fans), and the climatic conditions (total annual rainfall ranged from 1853 to 5780 mm year−1) observed in the studied areas made possible the diverse taxonomic classification for the eight Oxisols. Results obtained confirmed occurrence of Oxisols in Costa Rica and verify soil classification from previous literature reports. Our findings in soil genesis and forming factors enhance the knowledge in pedogenesis and properties of advanced weathering stage soils in Central America.}, journal={CATENA}, author={Camacho, Manuel E. and Mata, Rafael and Barrantes-Viquez, Manuel and Alvarado, Alfredo}, year={2021}, month={Feb} }
 @article{camacho_heitman_gannon_amoozegar_leon_2021, title={Seed germination responses to soil hydraulic conductivity and polyethylene glycol (PEG) osmotic solutions}, volume={462}, ISSN={["1573-5036"]}, url={https://doi.org/10.1007/s11104-021-04857-5}, DOI={10.1007/s11104-021-04857-5}, number={1-2}, journal={PLANT AND SOIL}, author={Camacho, Manuel E. and Heitman, Joshua L. and Gannon, Travis W. and Amoozegar, Aziz and Leon, Ramon G.}, year={2021}, month={May}, pages={175–188} }
 @article{camacho_quesada-roman_mata_alvarado_2020, title={Soil-geomorphology relationships of alluvial fans in Costa Rica}, volume={21}, ISSN={["2352-0094"]}, DOI={10.1016/j.geodrs.2020.e00258}, abstractNote={The precise determination of landforms and their formation processes are key to accomplish detailed soil mapping and better understand of soil genesis. The Upper General River Basin is located at the southeast of Costa Rica on the transition between Cordillera de Talamanca and General River Valley, forming an extensive alluvial fan sequence. Our work aims to determine the soil–geomorphology relationships on these alluvial fans. The methods employed consisted of geomorphological mapping using 1:25,000 aerial photographs to determine five alluvial fans: buried inactive, modeled inactive, early, intermediate, and late. Soil maps were established by combining landforms with soil survey data that allowed to differentiate twelve soil units of Ultisols associated with Oxisols, Inceptisols and Entisols. The most weathered soils were classified as Anionic and were Acrustox found on the oldest landforms located on buried inactive and early alluvial fans. These soils were found associated with Typic Rhodustults and Ustic Haplohumults. Typic Ustifluvents occurred on early alluvial fans and modeled inactive alluvial fans. Similar morphologic and chemical characteristics of the evaluated Oxisols were found for soils previously classified as Ultisols. These findings support the hypothesis that many soil currently classified as Ultisols could be reclassified as Oxisols (if the appropriate mineralogical analyses were conducted). These results put in perspective that the origin of the fans and hence their ages control the consequent soil development. In addition, the study contextualizes the implications of mapping and classifying highly weathered tropical soils for territorial planning, agricultural management and natural resources conservation.}, journal={GEODERMA REGIONAL}, author={Camacho, Manuel E. and Quesada-Roman, Adolfo and Mata, Rafael and Alvarado, Alfredo}, year={2020}, month={Jun} }
 @article{lakshman_singh_camacho_2018, title={Long-term cryopreservation of non-spore-forming fungi in Microbank (TM) beads for plant pathological investigations}, volume={148}, ISSN={["1872-8359"]}, DOI={10.1016/j.mimet.2018.04.007}, abstractNote={Long-term preservation of experimental fungi without genetic, morphological, and pathogenic changes is of paramount importance in mycological and plant pathological investigations. Several cryogenic and non-cryogenic methods are available for the preservation of fungi, but the methods can be cumbersome, hazardous, expensive, and often not suitable for long-term storage of non-spore-forming (sterile) fungi. A method of preservation of spore-forming fungi in commercially available porous beads (Micrbank™) under cryogenic condition was successfully tested for three non-spore-forming basidiomycetes genera: Rhizoctonia solani (teleomorph: Thanatephorus cucumeris) (n = 19), Ceratobasidium species (n = 1), and Waitea circinata (n = 3), and a non-spore forming ascomycetes, Sclerotinia sclerotiorum (n = 1). For comparison, spore-forming ascomycetous fungi, Alternaria alternata (n = 1), Bauveria basiana (n = 2), Botrytis cinerea (n = 1), Fusarium oxysporum f.sp. gladiolii (n = 1), Trichoderma spp. (n = 3), and Thielaviopsis basicola (n = 2) were also cryopreserved in Microbank beads. Viable fungal isolates of all test species were retrieved after five years of storage at −80 °C, which was longer than the viabilities of the corresponding isolates cryopreserved in agar plugs or colonized wheat seeds. Fungi revived from the Microbank beads maintained identical morphology and cultural characteristics of the parent isolates. Randomly selected Rhizoctonia isolates revived from the Microbank beads maintained respective pathological properties of the parent isolates; also, no mutation was detected in the internal transcribed spacer (ITS) ribosomal DNA when compared with respective cultures maintained at ambient temperature. This finding demonstrated the utility of cryopreservation in Microbank beads as a convenient alternative to conventional long-term preservation of a wide group of fungal cultures for plant pathological investigations and serves as the first report of using porous beads under cryogenic conditions for long-term storage of sterile fungi.}, journal={JOURNAL OF MICROBIOLOGICAL METHODS}, author={Lakshman, Dilip K. and Singh, Vimla and Camacho, Manuel E.}, year={2018}, month={May}, pages={120–126} }