Agriculture Commons^™

Genetic Markers And Tree Properties Predicting Wood Biorefining Potential In Aspen (Populus Tremula) Bioenergy Feedstock, Sacha Escamez, Kathryn M. Robinson, Mikko Luomaranta, Madhavi Latha Gandla, Niklas Mähler, Zakiya Yassin, Thomas Grahn, Gerhard Scheepers, Lars-Göran Stener, Stefan Jansson, Leif J. Jönsson, Nathaniel R. Street, Hannele Tuominen

Aspen Bibliography

Background Wood represents the majority of the biomass on land and constitutes a renewable source of biofuels and other bioproducts. However, wood is recalcitrant to bioconversion, raising a need for feedstock improvement in production of, for instance, biofuels. We investigated the properties of wood that affect bioconversion, as well as the underlying genetics, to help identify superior tree feedstocks for biorefining.

Results We recorded 65 wood-related and growth traits in a population of 113 natural aspen genotypes from Sweden (https://doi.org/10.5061/dryad.gtht76hrd). These traits included three growth and field performance traits, 20 traits for wood chemical composition, 17 traits for wood anatomy …

Less Fuel For The Next Fire? Short-Interval Fire Delays Forest Recovery And Interacting Drivers Amplify Effects, Kristin H. Braziunas, Nathan G. Kiel, Monica G. Turner

Aspen Bibliography

As 21st-century climate and disturbance dynamics depart from historic baselines, ecosystem resilience is uncertain. Multiple drivers are changing simultaneously, and interactions among drivers could amplify ecosystem vulnerability to change. Subalpine forests in Greater Yellowstone (Northern Rocky Mountains, USA) were historically resilient to infrequent (100–300 year), severe fire. We sampled paired short-interval (<30-year) and long-interval (>125-year) post-fire plots most recently burned between 1988 and 2018 to address two questions: (1) How do short-interval fire, climate, topography, and distance to unburned live forest edge interact to affect post-fire forest regeneration? (2) How do forest biomass and fuels vary following short-interval versus long-interval severe fires? …

Productivity Of Sorghum (Sorghum Bicolar L.) At Diverse Irrigation Regimes And Sowing Dates In Semi-Arid And Arid Environment, Muhammad Kashif Mubarik, Khadim Hussain, Ghulam Abbas, Muhammad Tanveer Altaf, Faheem Shahzad Baloch, Shakeel Ahmad

Turkish Journal of Agriculture and Forestry

Determining optimal sowing date, optimal number of irrigation applications, and best-performing cultivars is critical to maximizing achievable sorghum yield in semiarid and arid environments. Limited research is available on interactive effects of sowing date, irrigation frequency, and genotype at multiple locations. Consequently, this study was conducted to determine impact of sowing dates, irrigation regimes, and cultivars on yield and growth traits during 2016 and 2017 at two locations in Pakistan. Experiments were laid out in a split-split design at Maize and Millets Research Institute, Yusafwala, Sahiwal, and at Bahauddin Zakariya University, Multan. Each experiment was comprised of three factors: (a) …

Interactions Between Topsoil Properties And Ecophysiological Responses Of Mangroves(Avicennia Marina) Along The Tidal Gradient In An Arid Region In Qatar, Hanna Chang, Seung Hyun Han, Seongjun Kim, Jiae An, Juha Alatalo, Yowhan Son

Turkish Journal of Agriculture and Forestry

This study investigated the interactions between topsoil properties and ecophysiological responses of Avicennia marina along the tidal gradient in an arid region in Qatar. In February 2017, three plots were established, each at a distance of 0 m (D0), 50 m (D50), and 100 m (D100) from the inland boundary of a mangrove forest. Soil samples were collected at 0-10-cm depth in each plot to determine the chemical properties, and the density of seedlings, saplings, and trees was measured. Moreover, above- (AGB) and below-ground biomass (BGB) were calculated using an allometric equation for A. marina with the measured diameter at …

Climate-Induced Gradients Of Populus Sp. Forest Biomass On The Territory Of Eurasia, Usoltev Vladimir Andreevich, Omid Shobairi, Chasovskikh Viktor Petrovich

Aspen Bibliography

On the basis of the compiled database in a number of 413 sample plots with determinations of forest biomass of the genus Populus sp. on the territory of Eurasia from France to southern China and Japan statistically significant transcontinental decreasing of stem, above ground and total biomass as in the direction from northern temperate to subequatorial zonal belt and in the direction from the Atlantic and Pacific coasts to the continentality pole in Siberia is established. Unlike wood story, understory biomass in these directions has not decreased, and increasing. The root: shoot ratio increases in the range between northern temperate …

Association Of Digital Photo Parameters And Ndvi With Winter Wheat Grain Yield In Variable Environments, Alexey Morgounov, Nurberdi Gummadov, Savaş Belen, Yüksel Kaya, Mesut Keser, Jamala Mursalova

Turkish Journal of Agriculture and Forestry

The normalized difference vegetation index (NDVI) is gaining popularity as a complementary selection tool, even though it requires an instrument not readily available in the developing world. We evaluated several parameters (originating from the analysis of digital photos using BreedPix software) as potential selection criteria in 23 winter wheat yield trials grown over 4 years at 2 sites. NDVI and digital photos were taken at key development stages from stem elongation to maturity. The correlations between digital photo parameters a and u and grain yield, as well as correlations between NDVI and grain yield within individual trials, varied depending on …

Siberian Elm Responses To Different Culture Conditions Under Short Rotation Forestry In Mediterranean Areas, Ignacio Pérez, Javier Pérez, Juan Carrasco, Pilar Ciria

Turkish Journal of Agriculture and Forestry

This work explores the possibilities of biomass production, for energy purposes, of Siberian elm in Mediterranean areas, including marginal lands with poor soil and low water availability. To achieve this, the influence of soil type, planting density, and water availability on biomass production were analyzed after the first 3 years of the growing cycle in 2 different locations. Moreover, a method to estimate biomass production as a function of some morphological parameters of the trees, as well as the use of leaf water potential as a good indicator of trees' water status, are discussed. The analysis of parameters having an …

Nutrient Uptake Of Peanut Genotypes With Different Levels Of Drought Tolerance Under Midseason Drought, Hoang Thai Dinh, Wanwipa Kaewpradit, Sanun Jogloy, Nimitr Vorasoot, Aran Patanothai

Turkish Journal of Agriculture and Forestry

The objective of this study was to investigate the responses of peanut genotypes to midseason drought, regarding in particular nutrient uptakes and their correlations with biomass production and pod yield. The experiment was conducted during the dry seasons of 2011/12 and 2012/13. Five peanut genotypes with different levels of drought tolerance and 2 water regimes (well-watered and midseason drought) were laid out in a split-plot design with 4 replications. Midseason drought was imitated by stopping irrigation at 30 days after planting (DAP) and then rewatering at 60 DAP. The data were recorded for contents of N, P, K, Ca, and …

Growth, Biomass, Carbon Stocks, And Sequestration In An Age Series Of Populus Deltoides Plantations In Tarai Region Of Central Himalaya, Gurveen Arora, Sumit Chaturvedi, Rajesh Kaushal, Ajeet Nain, Salil Tewari, Nurnabi Meherul Alam, Om Prakash Chaturvedi

Turkish Journal of Agriculture and Forestry

Growth, biomass, carbon storage, and carbon sequestration potential along an age series in Populus deltoides plantations were assessed. The growth rate of diameter at breast height and height was higher in trees of 4 to 7 years and 2 to 5 years, respectively. The total aboveground biomass (AGB) increased with age and reached its maximum (180.2 Mg ha^{-1}) at 11 years of age. Mean carbon concentration in aboveground components varied from 39.7% to 51.7%. Allometric equations were developed to estimate biomass and biomass carbon in different tree components, which had adjusted R squares greater than 94%. Aboveground carbon stocks in …

Agricultural Geo-Engineering; Past, Present & Future, Erich J. Knight Mr.

Erich J Knight Mr.

Historic hall marks of GHG emissions are reviewed, providing repeated demonstration of anthropogenic land use changes on climate forcing.

New Astrophysical and Paleoclimate concordance with extinction events demonstrating climate adaptation by prehistoric man.

A review of new research concerning Soil Carbon, Carboniferous Aerosols, extent of Pyrolytic-Carbon fraction in soil and the first survey of the extensive deep soil carbon sink.

How thermal conversion technologies can integrate and optimize the recycling of valuable nutrients while providing energy and building soil carbon.

New discoveries from the Advanced Spectrometry & Meta-Genomics studies in soil microbiology which demonstrate unaccounted for ecological services provided by …

Two-Stage Sampling To Estimate Individual Tree Biomass, Ramazan Özçeli̇k, Tuncay Eraslan

Turkish Journal of Agriculture and Forestry

The accurate estimation of tree biomass is crucial for the efficient management of forest resources. In this study, we used a subsampling method for unbiased estimates of above-ground tree biomass. The method consists of 2 stages: the first stage consists of randomized branch sampling (RBS) and the second stage uses importance sampling (IS). RBS is used to select a path from the butt of an object branch to a terminal segment. IS is used for selecting a disk that produces unbiased estimates of the fresh biomass of tree. In this study, the subsampling method was tested on 14 black pine …

The Effects Of Biogas Slurry On The Production And Quality Of Maize Fodder, Md. Rafiqul Islam, Syed Mohammad Ehsanur Rahman, Md. Mukhlesur Rahman, Deog Hwan Oh, Chang Six Ra

Turkish Journal of Agriculture and Forestry

The present study examined the effectiveness of biogas slurry (liquor from anaerobic digestion process) as a nitrogen source for the production of maize fodder (Zea mays). Maize fodder was cultivated as a control (T_0: 0 kg of slurry N ha^{-1}) and with 3 different levels of biogas slurry-T_1 (60 kg of slurry N ha^{-1}), T_2 (70 kg of slurry N ha^{-1}), and T_3 (82 kg of slurry N ha^{-1})-in a randomized block design. The parameters studied were plant height, stem circumference, number of leaves, leaf area, dry matter yield, and nutrient contents in maize fodder. Maize plant height and stem …

Relationships Between Remotely Sensed Data And Biomass Components In A Big Sagebrush (Artemisia Tridentata) Dominated Area In Yellowstone National Park, Mustafa Mi̇ri̇k, Jack E. Norland, Mario E. Biondini, Robert L. Crabtree, Gerald J. Michels

Turkish Journal of Agriculture and Forestry

The predictive power of a hyperspectral imagery for estimating woody and herbaceous biomass were examined for a big sagebrush (Artemisia tridentata) dominated area in Yellowstone National Park, Wyoming, United States of America. The normalized difference vegetation (NDV) and structure insensitive pigment (SIP) indices were used to investigate the relationships between biomass components and reflectance spectra. Ground data were collected in 13 sample plots 1 m^2 in size by clipping all herbaceous vegetation to ground level and stripping green leaves from big sagebrush plants. Strong relationships (R^2 from 0.83 to 0.96) were found between the hyperspectral data and biomass components. The …