Forest Sciences Commons^™

Understanding The Accuracy And Best Use Of The Woodland Stick As A Tree Height And Diameter Measurement Tool: A Case Study In Oregon, Francisca Belart, Lauren Grand, Alicia Christiansen

Journal of Extension

We conducted a study to assess the accuracy of the Woodland Stick in determining tree diameter and height as compared to professional measurements and how bias can affect tree volume calculation. After comparing professional measurements with five non-professionals (NP’s) using the Woodland Stick, we found that three out of five NP’s had significant differences in mean dbh, and all of the NP’s had significant differences in mean total height. The overall bias for dbh across users was +0.5 inches and +5.1 ft for height. These deviations can result in volume differences between 0 and 30 bf on a single tree.

Drought Resilience And Legacy Effects In Two Forest Tree Species On Loess Plateau Of China: Growth And Water-Use Efficiency Under Different Drought Conditions, Lu Han, J. Julio Camarero, Guodong Jia, Zhiqiang Zhang, Lixin Chen

Aspen Bibliography

As droughts become more frequent and severer, understanding tree resilience and its role in mediating drought legacy effects (LEs) is critical for predicting forest ecosystem responses to future droughts and informing forest management. Both Pinus tabuliformis and Populus davidiana are widely distributed in the Loess Plateau region of western China and play important roles in provision of ecosystem services. In this study we quantified the LEs and resilience, including resistance (Rt) and recovery (Rc), of radial growth (BAI, basal area increment) and intrinsic water use efficiency (iWUE) of the two species, determined the external and internal factors influencing Rt and …

A Genome-Wide Association Study To Detect Candidate Genes Controlling Iron And Manganese Accumulation In Walnut (Juglans Regia L.), Özge Doğanay, Erdal Orman, Bülent Yağmur, Muhammed Bahatti̇n Tanyolaç, Duygu Ateş

Turkish Journal of Agriculture and Forestry

The walnut is one of the important low-glycemic sources of vegetable protein that benefit human health. Iron (Fe) and Manganese (Mn) are two of the walnut’s important nutritional components. This study aimed to identify single-nucleotide polymorphism (SNP) markers associated with the concentrations of Mn and Fe in walnut kernels and the genetic variation in these concentrations. The population was evaluated for two different years using 154 walnut genotypes and genotyping was performed with 16,473 SNP markers. A genome-wide association study was performed on 154 genotypes. A total of five and 15 SNPs were identified in different walnut genotypes, which were …

Impact Of Particle Size On Physical And Functional Characteristics Of Baby Corn Powder, Ubaida Akbar, Prasad Rasane, Md Sabir Ahmed Mondol, Jyoti Singh, Vikas Nanda, Hasan Kiliçgün, Sawinder Kaur

Turkish Journal of Agriculture and Forestry

This study’s objective is to explore the influence of particle size on the characteristics and functionalities of baby corn powder. In food product development and application, particle properties are crucial. Sieve analysis using a series of standardized sieves determined the particle size distribution, ranging from >500 µm to 53 µm. The particles exhibited stability, with an average size of 208.8 nm, a polydispersity index of 0.133, and a zeta potential of –20 mV. Bulk density (BD) and true density (TD) showed an inverse relationship with particle size, with BD ranging from 0.552 to 0.238 gcm–3 for particle sizes >500 to …

Mapping Of Qtls Associated With Frost Tolerance In Olive (Olea Europaea L.), Öznur Çeti̇n, Nurengi̇n Mete, Handan Ölmez, Hati̇ce Gülen

Turkish Journal of Agriculture and Forestry

The olive (Olea europaea L.) is widely distributed due to its high adaptability to different environmental conditions. However,in recent years, sudden extreme temperature decreases and frost damage have caused significant yield and quality losses in some regions.This situation has led to the development of varieties with high frost tolerance, suitable for regions where cold damage may occur.It takes many years to develop varieties using classical breeding methods in olives. Therefore, early selection should be made usingbiotechnological methods. Markers about any trait provide a great advantage, especially in plant species with a very long juvenile sterilityperiod, as they allow for a …

The Role Of Brassinosteroids In Plant Physiological And Molecular Responses To Counter Salt Stress And Ensure Food Security: A Review And Future Perspectives, Muhammad Umair Hassan, Huang Guoqin, Muhammad Nawaz, Adnan Noor Shah, Tahir Abbas Khan, Muhammad Inzamam Ul Haq, Mehmood Ali Noor, Zhou Ping, Liu Qin, Yasser S. Mostafa, Saad A. Alamri, Melekber Sülüşoğlu Durul, Mehmet Ramazan Bozhüyük, Mohamed Hashem

Turkish Journal of Agriculture and Forestry

Excessive salinity poses serious threats to crop productivity and global food security. Salt stress reduces crop growth and final productivity by inducing ionic, osmotic, and oxidative damage. Applying plant growth hormones is thought to be an efficient method of reducing the negative effects of salinity. Brassinosteroids (BRs) are plant hormones that have demonstrated appreciable effects against different abiotic stresses. BRs can mitigate the deleterious impacts of salt stress by improving water and nutrient uptake, membrane stability, antioxidant activities, and osmolyte synthesis while maintaining the hormonal balance. Furthermore, BRs can also improve the metabolic and molecular responses of plants to help …

Chemical Composition And Larvicidal Toxicity Of Ricinus Communis L. (Euphorbiaceae) Extracts Against Larvae Of Thaumetopoea Pityocampa (Denis & Schiffermüller, 1775) (Lepidoptera: Notodontidae), Memi̇ş Kesdek, Şaban Kordali, Selçuk Küçükaydin

Turkish Journal of Agriculture and Forestry

In this study, the toxicities of extracts obtained from the seeds and leaves of castor bean (Ricinus communis L.) (Euphorbiaceae) plant against five larval stages of the pine processionary moth (PPM) (Thaumetopoea pityocampa (Denis & Schiffermüller, 1775) (Lepidoptera: Notodontidae)) were investigated under laboratory conditions. Petroleum ether, acetone, and methanol extracts were prepared at various concentrations (0.25, 0.5, and 1 mg/mL) and sprayed on each larval stage. Each test was performed with three replications and two repetitions. Sterile water + ethanol was used as a negative control and the commercial chemical Kormilin 25 WP (25% diflubenzuron) was used as a positive …

Identification And Functional Characterization Of The Icse1 Gene From Ilex Cornuta, Xiaoxi Zhang, Li Zhu, Weiwei Zhang, Feng Xu, Jiabao Ye, Yongling Liao

Turkish Journal of Agriculture and Forestry

Ilex cornuta (I. cornuta) is a traditional Chinese medicine that is rich in various secondary metabolites with pharmacological activities, among which triterpenoid saponins are one of the main active components. Squalene epoxidase (SE) is a key regulatory enzyme in the biosynthesis of triterpenoids. In this study, we isolated a squalene epoxidase (IcSE1) from I. cornuta and analyzed its molecular characteristics and functions. The results indicated that the total length of the IcSE1 sequence was 1942 bp, which includes a 1638 bp open reading frame (ORF) that encodes 545 amino acids. The theoretical isoelectric point (pI) and molecular weight of the …

Exploring Genetic Diversity: The Inheritance Of Protein And Mineral Contents In Dwarf Common Beans, Ercan Ceyhan, Ayşegül Korkmaz, Amjad Ali̇, Serdar Karadaş, Mustafa Harmankaya, Duran Şi̇mşek, Tolga Karaköy

Turkish Journal of Agriculture and Forestry

Beans are a vital plant-based protein, containing essential minerals that are necessary for human health. Their protein and mineral compositions vary due to factors including cultivar or variety, growth conditions, and processing methods. Global deficiencies in protein and minerals necessitate fortification, supplementation, and dietary diversification. The present study focuses on common bean (Phaseolus vulgaris) cultivars, aiming to understand their genetic variation and inheritance of protein and mineral contents. Five dwarf common bean cultivars (Lida, Beyzade, Ribera, Albeni, and Garrafol) were used in a full-diallel hybridization method and the experiment was conducted in Konya, Türkiye. The diallel analysis assessed both general …

Molecular Screening Of Septoria-Resistant Genes In Historical Turkish Bread Wheat Germplasm Using The Validated Gene Specific Ssr Markers, Amjad Ali, Fati̇h Ölmez, Muhammed Tatar, Parnaz Mortazavi, Muhammad Tanveer Altaf, Emi̇ne Burcu Turgay, Hüsnü Aktaş, Muhammad Azhar Nadeem, Jazib Javed, Jin-Ying Gou, Muhammad Aasim, Abdelfattah A. Dababat, Faheem Shehzad Baloch

Turkish Journal of Agriculture and Forestry

Septoria tritici blotch (STB), caused by Zymoseptoria tritici, poses a significant threat to global wheat production, particularly in Türkiye. Resistance breeding is the most sustainable and effective disease control method. Molecular markers, especially simple sequence repeat (SSR) markers are extensively employed in wheat breeding to enhance the efficacy. The primary objective of this study was to identify Stb resistance genes among 143 historical registered Turkish bread wheat genotypes released as commercial cultivars between 1963 to 2014, using 16 closely linked SSR markers. The findings revealed substantial genetic variation among the screened cultivars, with the Stb3 gene being the most prevalent, …

Enhancing Salt Tolerance And Yield Potential In Cotton: Insights From Physiological Responses, Genetic Variability, And Heterosis, Muhammad Mubashar Zafar, Abdul Razzaq, Zunaira Anwar, Aqsa Ijaz, Muhammad Zahid, Muhammad Shahid Iqbal, Ghulam Farid, Mahmoud F. Seleiman, Rana Qammar Uz Zaman, Abdur Rauf, Xuefei Jiang

Turkish Journal of Agriculture and Forestry

Soil salinity is a growing global concern, necessitating the development of salt-tolerant cotton cultivars to enhance the utilization of salt-affected soils and boost crop productivity. Salt tolerance is regulated by a complex interplay of genetic and physiological factors involving multiple genes. To investigate the genetic basis of salt stress tolerance, eight parental genotypes (four lines and four testers) and their 16 hybrid combinations were evaluated under normal and salt stress conditions (15 dS m⁻¹). Data were collected on various traits including the plant height (PH), number of bolls per plant (NBP), boll weight (BW), lint percentage (LP), seed cotton yield …

Nutritional And Microbiological Properties Of Cheese With Dried Elderberry And Red Grape Pomace, Andreea Dodan, Romina Alina Marc, Crina Carmen Mureşan, Carmen Rodica Pop, Delia Michiu, Miuța Rafila Filip, Roxana Nicoleta Rațu, Florina Stoica, Ioana Cristina Crivei, Alina Narcisa Postolache, Melinda Kovacs, Rodica Maria Sima, Mircea Valentin Muntean

Turkish Journal of Agriculture and Forestry

This study aimed to explore the use of grape byproducts such as red grape pomace and elderberry, in the form of bioactive powders to obtain three-month old cheese assortments. Grape pomace powder (GPP) and elderberry fruit powder (EFP) contain antioxidant components such as phenols, anthocyanins and flavonoids, and compounds characterized by high bioactivity. This study investigated not only the potential of incorporating different percentages (1%, 2%, and 3%) of GPP and EFP in cheese, to increase its nutritional value, but also the changes that occur during the 2 months of ripening. The results indicated that the incorporation of GPP and …

Transcriptome And Metabolome Analysis Of Low-Temperature Storage On Fruit Quality Deterioration Of Mangoes, Hanqing Cong, Ting Huo, Xinran Huang, Yeyuan Chen, Yibo Bai, Haiyan Luo, Xiaona Fu, Rongxiang Wang, Mahmoud F. Seleiman, Tanweer Ahmad, Pingyin Guan, Mohsin Bashir, Muhammad Asif, Fei Qiao

Turkish Journal of Agriculture and Forestry

Mango, a typical respiratory climacteric fruit, is susceptible to a short shelf life and quality deterioration during postharvest ripening. Although low temperature can prolong the storage time significantly, its effects on fruit quality have yet to be elucidated. Through a combination of transcriptome and metabolome analyses, this study aimed to elucidate the effects of low-temperature storage on the biosynthesis of volatile organic compounds (VOCs), flavonoids, sucrose, and the degradation of organic acids in mango. Carbohydrate-related metabolism maintained high activity when stored at 13 °C by upregulating the expression of certain gene members in the neutral invertase (NI), sucrose phosphate synthase …

Understanding The Role Of Thermal Stress In Modulating Growth, Yield, And Quality Attributes Of Tomato At Two Locations, Muhammad Uzair, Rabia Kalsoom, Kotb A. Attia, Irfan Ali, Tanveer Hussain, Asmaa M. Abushady, Haider Ali, Sajid Fiaz, Saima Jameel, Muhammad Usman Hameed, Rashid Iqbal, Muhammad Ramzan Khan

Turkish Journal of Agriculture and Forestry

Tomato is a well-recognized and extensively cultivated crop on a global scale. However, the development of tomato varieties is hindered by adverse environments, limited genetic diversity, and low rates of seed setting. In this study, we evaluated 21 genotypes at two different locations in Pakistan. We analyzed morphological traits including vine length, days to 50% flowering, days to fruit setting initiation, number of clusters per plant (NCP), and number of flowers per cluster (NFC); yield-related traits such as fruit setting percentage per cluster, fruit setting percentage per plant, number of marketable fruits per plant (NMFP), marketable fruit yield per plant …

Phytochemical Analysis And In Vitro And In Vivo Pharmacological Activities Of Cordia Myxa Extracts, Tatheer Fatima, Mirza Imran Shahzad, Adnan Noor Shah, Zhang Yi, Bushra Gillani, Iqra Hussain, Adina Gillani, Zeli̇ha Çi̇ftçi̇, Marcello Locatelli, Ashraf Atef Hatamleh, Munirah Abdullah Al-Dosary

Turkish Journal of Agriculture and Forestry

Cordia myxa is found in tropical regions of Pakistan, where it is commonly known as lasura. This study aimed to assess the preliminary results of phytochemical analysis and the pharmacological activities of C. myxa. After pulverizing the fresh plant, extracts were prepared using different solvents, including aqueous, methanol, ethanol, dichloromethane, ethyl acetate, and n-hexane extracts. These extracts were examined for total phenolic contents using standard biochemical tests and high performance liquid chromatography with a photodiode array. In further evaluations, antioxidant, antibacterial, antiviral, hen’s egg test on chorioallantoic membrane (HETCAM) assay, antipyretic, antiinflammatory, and antidiabetic activities were monitored. Using ferric reducing …

Bioactive Content And Antioxidant Capacity Of Some Plants And Fruits Grown In Türkiye, Gülay Özkan, Fatma Betül Sakarya, Bayram Yurt, Elwira Sieniawska, Yakup Yapar, Esra Çapanoğlu Güven

Turkish Journal of Agriculture and Forestry

Recently, some edible plants and fruits have undergone extensive research to identify potential health effects arising from their valuable nutritional and bioactive properties. The present study aims to investigate the phenolic compounds of nine edible plants and fruits throughout the gastrointestinal digestion model by comparing their total content and antioxidant activity. Of the species studied, Eremurus spectabilis and Gundelia tournefortii had the lowest total phenolic content, whereas Prunus armeniaca showed the highest value of 1026 ± 164 mg GAE/100 g. Except for Prunus armeniaca , the total phenolic contents of all samples were increased following gastric digestion, while the total …

Agronomic Performance Of Fenugreek Genotypes Grown Under Various Sowing And Nitrogen Rates In A Highland Environment, Furkan Çoban, Hakan Özer

Turkish Journal of Agriculture and Forestry

Fenugreek is an important medicinal plant used in food, medicine, and other industries. In recent years, there has been increased interest in the fenugreek plant, with increased support given for fenugreek in Türkiye. However, there is a need for sound recommendations on agronomic practices such as variety selection, plant density, and fertilization due to local differences in the climate and soil structure. This research was conducted to determine the yield and some agricultural characteristics of two fenugreek genotypes (Turkish and Iranian) grown under different nitrogen (N) (0, 20, 40, 60, and 80 kg ha–1) and sowing (20, 40, and 60 …

A Fire Deficit Persists Across Diverse North American Forests Despite Recent Increases In Area Burned, Sean A. Parks, Christopher H. Guiterman, Ellis Q. Margolis, Margaret Lonergan, Ellen Whitman, John T. Abatzoglou, Donald A. Falk, James D. Johnston, Lori D. Daniels, Charles W. Lafon, Rachel A. Loehman, Kurt F. Kipfmueller, Cameron E. Naficy, Marc-André Parisien, Jeanne Portier, Michael C. Stambaugh, A. Park Williams, Andreas P. Wion, Larissa L. Yocom

Wildland Resources Faculty Publications

Rapid increases in wildfire area burned across North American forests pose novel challenges for managers and society. Increasing area burned raises questions about whether, and to what degree, contemporary fire regimes (1984–2022) are still departed from historical fire regimes (pre-1880). We use the North American tree-ring fire-scar network (NAFSN), a multi-century record comprising > 1800 fire-scar sites spanning diverse forest types, and contemporary fire perimeters to ask whether there is a contemporary fire surplus or fire deficit, and whether recent fire years are unprecedented relative to historical fire regimes. Our results indicate, despite increasing area burned in recent decades, that a …

Woody Plant Reinvasion Shortens The Lifespan Of Grassland Restoration Treatments, Dillon T. Fogarty, Michele Beadle, Craig R. Allen, Christine Bielski, Dirac Twidwell

Biology Student Work

An important question in restoration ecology is whether restored ecological regimes are more vulnerable to transitions back to a degraded state. In woody-invaded grasslands, high-intensity fire can collapse woody plant communities and induce a shift back to a grass-dominated regime. Yet, legacies from woody-dominated regimes often persist and it remains unclear whether restored regimes are at heightened vulnerability to reinvasion. In this study, we utilize a 17-year history of fire-based restoration in Nebraska's Loess Canyons Experimental Landscape to determine whether restored grassland regimes experience faster rates of Juniperus virginiana (eastern redcedar) reinvasion compared to the initial invasion process in adjacent …

Attitudes Toward The Continued Protection Of Grizzly Bears Under The Endangered Species Act, John A. Vucetich, Jeremy T. Bruskotter

Michigan Tech Publications

In January 2025, the U.S. Fish & Wildlife Service published a proposed rule to continue protecting grizzly bears in the contiguous United States under the Endangered Species Act (ESA). The proposed rule and guidance for how the public can comment on the proposed rule can be found at this link: https://www.fws.gov/press-release/2025-01/usfws-proposes-update-grizzly-bear-esa-listing-management

In January 2025, we implemented a web-based survey designed to assess the attitudes of residents of the contiguous United States, as they pertain to the appropriateness of continuing protection of grizzly bears under the ESA. A large body of prior research indicates that individuals’ attitudes toward species protections can …