Forest Sciences Commons^™

A Synoptic Review Of U.S. Rangelands A Technical Document Supporting The Forest Service 2010 Rpa Assessment, Matthew Clark Reeves, John E. Mitchell

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

The Renewable Resources Planning Act of 1974 requires the USDA Forest Service to conduct assessments of resource conditions. This report fulfills that need and focuses on quantifying extent, productivity, and health of U.S. rangelands. Since 1982, the area of U.S. rangelands has decreased at an average rate of 350,000 acres per year owed mostly to conversion to agricultural and residential land uses. Nationally, rangeland productivity has been steady over the last decade, but the Rocky Mountain Assessment Region appears to have moderately increased productivity since 2000. The forage situation is positive and, from a national perspective, U.S. rangelands can probably …

Nebraska’S Forest Resources, 2012, Dacia M. Meneguzzo, Chuck Barnett

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

This publication provides an overview of forest resource attributes for Nebraska based on an annual inventory conducted by the Forest Inventory and Analysis (FIA) program at the Northern Research Station of the U.S. Forest Service. These estimates, along with web-posted core tables, will be updated annually. For more information please refer to page 5 of this report.

Profitable Farms And Woodlands: A Practical Guide In Agroforestry For Landowners, Farmers And Ranchers, J. O. Idassi

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

This handbook is part of an interdisciplinary, interinstitutional and comprehensive effort to develop a practical guide to assist underserved and limited resource small farmers and woodland owners to adopt best management technologies in agroforestry. Funding for this effort was provided through the USDA National Agroforestry Center (NAC) from the US Forest Service and the Natural Resources Conservation Service (NRCS) under cooperative agreement number 68-7482-7-361 with Tennessee State University, Cooperative Extension Program and the 1890/1862 Agroforestry Team.

This guide was prepared by an agroforestry team of research and extension specialists from the 1862 and 1890 Land Grant Universities in collaboration with …

Agroforestry: Accounting For Windbreak's Climate Change Contributions, Michele Schoeneberger, Jim Brandle, Xinhua Zhou, John Kort, Tom Sauer

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

No abstract provided.

The Relationship Between Male Moth Density And Female Mating Success In Invading Populations Of Lymantria Dispar, Patrick C. Tobin, Ksenia S. Onufrieva, Kevin W. Thorpe

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

The successful establishment of non-native species in new areas can be affected by many factors including the initial size of the founder population. Populations comprised of fewer individuals tend to be subject to stochastic forces and Allee effects (positive-density dependence), which can challenge the ability of small founder populations to establish in a new area. Although the conceptual relationship between initial colony size and establishment success has been previously documented, it is not trivial to estimate precisely the colony size needed to ensure colony persistence. Over the last 40 years, there have been many studies on the probability of mating …

Effect Of Row Spacing On Seed And Forage Yield In Sainfoin (Onobrychis Viciifolia Scop.) Cultivars, Vladeta Stevovic, Rade Stanisavljevic, Dragan Djukic, Dragan Djurovic

Turkish Journal of Agriculture and Forestry

A field experiment including 3 sainfoin cultivars (Makedonka, EG Norm, and the Sokobanja population) was set up in a seed production trial with the aim of determining adequate row spacing for seed and forage yield. The cultivars were sown at 3 different row spacings (20 cm, 50 cm, and 80 cm) and at a within-row spacing of 1 cm. Seed yield was determined over a 3-year period, whereas forage yield and quality were evaluated from the 2nd cut in the 2nd and 3rd years. Crop thinning through the years, distinct competitive ability of sainfoin, and a large impact of weather …

Moringa Oleifera Leaf Extract: An Innovative Priming Tool For Rangeland Grasses, Wasif Nouman, Muhammad Tahir Siddiqui, Shahzad Maqsood Ahmed Basra

Turkish Journal of Agriculture and Forestry

Moringa oleifera leaf extract (MLE) is rich in amino acids, ascorbate, zeatin, minerals, and many other compounds known for their growth-promoting potential. This study was planned to explore the potential of MLE as a seed priming agent to increase the germination rate and plant vigor of 3 range grasses, i.e. Cenchrus ciliaris, Panicum antidotale, and Echinochloa crusgalli. The priming strategies used were hydropriming, CaCl_2, PEG-8000 (-1.1 M Pa), MLE (concentrate; 1:10, 1:20, 1:30, and 1:40 dilutions with distilled water), and matripriming using saturated jute mat for 24 h. The primed seeds were placed between 2 moist Whatman No. 1 filter …

An Evaluation Of Seed Spacing Accuracy Of A Vacuum Type Precision Metering Unit Based On Theoretical Considerations And Experiments, İsmet Önal, Adnan Deği̇rmenci̇oğlu, Arzu Yazgi

Turkish Journal of Agriculture and Forestry

Currently the most widely used machine for precision seeding of cotton and maize seed is vacuum type. The capture of seeds by vacuum plate and the release of seeds from the vacuum plate should be performed precisely without missing or doubling. The physical phenomena should be clarified theoretically to understand how the precision seeding mechanism works. To solve these problems, an attempt was made to develop a nomogram using equations describing the technical characteristics of the seeder used in this study and to describe the seed capture mechanism relying on basic principles of fluid mechanics and aerodynamic properties of seeds. …

The Role Of Short-Term High Temperature Pretreatment On The Uv-B Tolerance Of Barley Cultivars, Nuran Çi̇çek, Ivanka Fedina, Hüsnü Çakirlar, Maya Velitchkova, Katya Georgieva

Turkish Journal of Agriculture and Forestry

The impact of pretreatment with high temperature (45 °C for 45 min) on the UV-B tolerance of 4 barley cultivars (Hordeum vulgare L. 'Bülbül-89', 'Kalaycı-97', 'Tarm-92', and 'Tokak-157/37') was examined. The response of the plants to treatment was evaluated by measuring the pigment content, chlorophyll a fluorescence, oxygen evolution, fraction of oxygen-evolving complex, proline content, UV-B-absorbing compounds (A_{535} and A_{300}), and stress markers (malondialdehyde, H_2O_2, and UV-B marker). Regardless of high temperature pretreatment, UV-B irradiation decreased the photosynthetic pigment content, photosystem II activity, oxygen evolution, and the fraction of oxygen-evolving complex in almost all of the barley cultivars. UV-B treatment …

Rootstock Potential Of Turkish Lagenaria Siceraria Germplasm For Watermelon: Plant Growth, Yield And Quality, Fati̇h Karaca, Hali̇t Yeti̇şi̇r, İlknur Solmaz, Eli̇f Çandir, Şener Kurt, Nebahat Sari, Zehra Güler

Turkish Journal of Agriculture and Forestry

The rootstock potential of 21 bottle gourds (Lagenaria siceraria) collected from the Mediterranean region (Turkey) was investigated for watermelon with regard to plant growth, yield, and fruit quality. The Crimson Tide watermelon cultivar was used as a scion and 2 commercial rootstocks (L. siceraria) were also used for comparison. In greenhouse conditions, the survival rate of grafted plants and the effect of rootstocks on plant growth were determined. The grafted plants were planted under low tunnels in early spring and the effects of the rootstocks on early yield, total yield, and fruit quality were evaluated. The survival rates of the …

Agrobacterium-Mediated Transformation Of Grapefruit With The Wild-Type And Mutant Rna-Dependent Rna Polymerase Genes Of Citrus Tristeza Virus, Bayram Çevi̇k, Richard F. Lee, Charles L. Niblett

Turkish Journal of Agriculture and Forestry

Citrus paradisi Macfad. ‘Duncan’ was transformed with constructs coding for the wild-type and mutant RNA-dependent RNA polymerase (RdRp) of Citrus tristeza virus (CTV) for exploring replicase-mediated pathogen-derived resistance (RM-PDR). The RdRp gene was amplified from a CTV genome and used to generate the wild-type and 2 mutant RdRp constructs for plant transformation. One mutant had the key amino acids GDD changed to AAA (RdRp-mGDD), and the second mutant had a deletion encompassing the GDD domain (RdRp-\DeltaGDD). Etiolated epicotyl segments of Duncan grapefruit (Citrus paradisi Macfad. 'Duncan') were transformed with each of these constructs using the Agrobacterium-mediated transformation method. From 4540 …

Identification And Purity Testing Of Maize Hybrids With One Parent In Common By Ultrathin-Layer Isoelectric Focusing Of Seed Salt-Soluble Proteins, Xiao-Yue Dou, Min Yan, Yu-Feng Xu, Khalid Hussain, Yuan-Zhi Liu, Feng Lin

Turkish Journal of Agriculture and Forestry

The objective of this study was to discriminate 11 maize hybrids with one parent in common using ultrathin-layer isoelectric focusing (UTLIEF) of seed salt-soluble proteins in 0.02% NaCl solution in the laboratory. Thirty-two protein bands were found in the pH range of 5.0-7.0, 62.5% of which were polymorphic. Six hybrids with the same male parent and 5 hybrids with the same female parent were differentiated by their patterns and numbers of polymorphic protein bands. The result showed that UTLIEF has the characteristics of high resolution to discriminate close genetic relationships. Meanwhile, the genetic purity of 11 hybrids were tested, and …

Pattern Analysis Of Multi-Environment Yield Trials In Barley (Hordeum Vulgare L.), Soner Yüksel, Mevlüt Akçura

Turkish Journal of Agriculture and Forestry

Pattern analysis, cluster and ordination techniques were applied to grain yield data of 24 cultivars of 2- and 6-rowed barley (Hordeum vulgare L.) grown in 26 environments in Turkey during 2004-2008 to identify patterns of genotype (G), environment (E) and genotype × environment interaction (GEI) in barley multi-environment trials (METs). Analysis of variance showed that 86.9% of the total sum of squares was accounted for by E. Of the remaining sum of squares, the contribution of GEI was almost 9 times that of the contribution of G alone. Knowledge of environmental and cultivar classification helped to reveal several patterns of …

Identification Of Species Of Vicia Subgenus Vicia (Fabaceae) Using Chloroplast Dna Data, Nadia Haider, Imad Nabulsi, Nizar Mirali

Turkish Journal of Agriculture and Forestry

Vicia subgenus Vicia (Fabaceae) contains several economically important food and forage legume species. Generally, the taxonomy and identification of these species have relied heavily on a few diagnostic morphological characters (e.g., the number of flowers per inflorescence). However, there are several specimens with intermediate morphological characters that make diagnosis of these species using those characters a difficult task for nonspecialists and render results that are not always accurate. The use of molecular markers, therefore, is the most attractive alternative strategy for a more accurate identification of species of the subgenus Vicia. In the present study, an attempt was made to …

Differences In Some Physical And Chemical Properties Of Wheat Grains From Different Parts Within The Spike, Hüseyi̇n Boz, Kami̇l Emre Gerçekaslan, Mehmet Murat Karaoğlu, Hali̇s Gürbüz Kotancilar

Turkish Journal of Agriculture and Forestry

There is not enough information on the distribution of grain components from different areas within a spike of wheat. The aim of this study was to determine how grain position affects some physical and chemical properties of grains. Grain size, thousand-grain and hectoliter weight, Zeleny sedimentation, falling number, wheat color, grain hardness, wet and dry gluten contents, and protein and ash contents were determined in grains from different parts of the spike (bottom, middle, and top) in Karasu-90, Palandöken-97, Yıldırım, Bezostaya-1, and Doğu-88 wheat varieties. Grain position in the spike had a significant effect on some physical and chemical properties …

Genetic Characterization Of Pyrenophora Graminea Isolates And The Reactions Of Some Barley Cultivars To Leaf Stripe Disease Under Greenhouse Conditions, Harun Bayraktar, Kadi̇r Akan

Turkish Journal of Agriculture and Forestry

The genetic diversity of Pyrenophora graminea, the causal agent of barley leaf stripe disease, was characterized by restriction fragment length polymorphism (RFLP) of the rDNA internal transcribed spacer region and intersimple sequence repeat (ISSR) analysis. A total of 45 P. graminea isolates recovered from different geographic origins and barley cultivars or genotypes produced identical RFLP banding patterns with HinfI, MspI, Hin6I and BsuRI restriction enzymes. ISSR analysis indicated that there was little genetic variability among the isolates. A dendrogram based on Jaccard's coefficient separated the isolates into 4 clusters with 12% dissimilarity. In the dendrogram, the isolates collected from different …

Spot Blotch Resistance In Derivatives Of European Winter Wheat, Zilvinas Liatukas, Vytautas Ruzgas

Turkish Journal of Agriculture and Forestry

The effects of inoculum concentrations and the aggressiveness of spot blotch (Bipolaris sorokiniana (Sacc.) Shoemaker) isolates were evaluated on the resistance of 123 winter wheat advanced breeding lines developed from European winter wheat as well as on 3 control cultivars, BR8, BH1146, and Zentos. The test was conducted under laboratory conditions using a detached leaf technique. A total of 3 inoculum concentrations were used: 0.5 × 10^3, 1 × 10^3, and 5 × 10^3 spores mL^{-1}. The results of the study revealed low resistance of the tested material when accessions were compared by the percentage of disease severity (DS), but …

Incidence And Genetic Stability Of Potato Spindle Tuber Pospiviroid In Potato In Turkey, Üftade Güner, Hi̇kmet Murat Si̇pahi̇oğlu, Mustafa Usta

Turkish Journal of Agriculture and Forestry

The prevalence of Potato spindle tuber pospiviroid (PSTVd) infection in randomly selected potato tubers was determined via nonisotopic dot blot hybridization and reverse transcriptase polymerase chain reaction (RT-PCR). In January and February of 2010, 168 seedling tubers of Solanum tuberosum, representing 27 cultivars, were received from different seedling potato producers in Turkey. Digoxigenin-labeled RNA probes of PSTVd were synthesized from the cloned PCR products and applied in dot blot hybridization to detect viroids in RNA extracts isolated from dormant potato tubers. PSTVd was found in 7 samples and 6 cultivars (Innovator, Lady Jo, Russet Burbank, Agria, Provento and Konsül). Some …

Investigating Rainfall Erosivity Indices In Arid And Semiarid Climates Of Iran, Elaheh Moussavi Kiassari, Davood Nikkami, Mohammad Hossein Mahdian, Ebrahim Pazira

Turkish Journal of Agriculture and Forestry

The rainfall erosivity index is one of the most important factors influencing soil erosion. For this reason, investigating the accuracy of rainfall erosivity indices is very important in different climatic regions. The objective of this research was to investigate different rainfall erosivity factors and determine the most appropriate ones for use in the central and northeastern parts of Iran. For this reason, necessary data were collected from 92, 6 and 10 soil erosion research plots in Khorasan Razavi, Semnan and Isfahan provinces, respectively. The rainfall intensities were recorded, as was the sediment yield associated with storm events, and 63 different …

Morphological And Biochemical Evaluation Of Selected Almond [Prunus Dulcis (Mill.) D.A.Webb] Genotypes In Northern Serbia, Slavica Colic, Vera Rakonjac, Gordan Zec, Dragan Nikolic, Milica Fotiric Aksic

Turkish Journal of Agriculture and Forestry

In order to determine the overall degree of polymorphism and detect similarities among genotypes, 19 almond [Prunus dulcis (Mill.) D.A.Webb] genotypes were studied. Variation in traits related to phenology, morphology, and fruit quality was observed, and the results indicated a high morphological diversity of almond genotypes. The majority of important correlations were determined among the traits representing nut size (nut width, nut length, nut thickness, and nut weight) and leaf size (leaf length, leaf width, and leaf area). The lack of correlation between kernel size and chemical compounds enables the creation of a new almond cultivar with large kernels and …