Results 131 to 140 of about 163,574 (275)

What can lithics tell us about food production during the transition to farming? Exploring harvesting practices and cultural changes during the neolithic in Southwest Asia: a view from Qminas (north‐western Syria)

Archaeometry, EarlyView.
Abstract This study examines the continuity and change in harvesting practices between the Late Pre‐Pottery Neolithic B (LPPNB) and the Early Pottery Neolithic at Qminas, north‐western Levant, through a traceological analysis of flint sickles. By combining qualitative traceological analysis with quantitative functional approaches, we demonstrate that ...
Fiona Pichon, Osamu Maeda, Juan José Ibáñez Estévez, Patricia Anderson   +3 more
wiley   +1 more source

Environmentally adjusted productivity growth and shadow prices for dairy farms

Canadian Journal of Agricultural Economics/Revue canadienne d'agroeconomie, EarlyView.
Abstract We estimate the environmentally adjusted productivity growth and shadow price for Ontario dairy farms. We use an input‐oriented directional distance function and farm‐level data from 2000 to 2020. First, we find that while GHG emissions per cow increase with higher milk yields, emission intensity decreases as milk yield per cow increases.
Bibek Dahal, Getu Hailu, Susantha Jayasundara   +2 more
wiley   +1 more source

Felons’ chattels and English living standards in the later fourteenth and fifteenth centuries

The Economic History Review, EarlyView.
Abstract The later fourteenth and fifteenth centuries have long occupied an intriguing and contested place in discussions of England's long‐run economic development. One key issue around which debate has coalesced is the living standards of the population as a whole and of different groups within it. We contribute to this debate by bringing forward new
Chris Briggs, Ben Jervis, Alice Forward, Tomasz Gromelski, Matthew Tompkins   +4 more
wiley   +1 more source

Studies of the availability of soil phosphorus (P) and potassium (K) in organic farming systems, and of plant adaptations to low P- and K-availability [PDF]

, 2003
In organic farming systems, the purchase of nutrients is firmly restricted as compared to conventional farming systems. This will often cause a negative nutrient budget on the field level, especially in cases with low animal density, where more nutrients
Løes, Anne-Kristin
core  

Klebsiella sp. strain B7 enhances alkaline tolerance by secreting pyruvic acid to accelerate L‐malic acid accumulation in soybean

Journal of Integrative Plant Biology, EarlyView.
Klebsiella sp. strain B7 acts as a positive regulator in alkaline stress responses in soybean. By activating pyruvic acid metabolism and L‐malic acid biosynthesis pathways, B7 significantly increases alkaline tolerance and yield in soybean. ABSTRACT Alkaline stress is a major constraint on crop growth and development and negatively impacts soybean ...
Yingxue Cao, Yijia Jiang, Yang Li, Yong Long, Siyu Huang, Hongwei Li, Miao Yang, Mingyu Yang, Yuecheng Tang, Bo Zhang, Zhongming Fang, Ming Yuan, Zhenhua Yu, Fanli Meng   +13 more
wiley   +1 more source

Alternative Protein Sources in Poultry and Pig Nutrition—A Review

Journal of Animal Physiology and Animal Nutrition, EarlyView.
ABSTRACT Proteins are an essential nutrient for the viability of all animals, enabling organisms to grow, regenerate and defend themselves against pathogenic organisms. Soybean and soybean‐based materials are commonly used to supplement protein in animal nutrition.
Lukáš Čumplík, Dana Zálešáková, Jakub Novotný, Lenka Kudlová, Leoš Pavlata, Ondřej Šťastník   +5 more
wiley   +1 more source

Influence of straw residue cover on the sprouting and yield of spring cereals in direct seeding on clay soil in Southern Finland [PDF]

, 2006
In normal years when there is no insufficiency of water, 2-4 t/ha is an adequate amount of straw residue to cereals on soil surface in direct seeding, but if the beginning of growth season is very dry, a thicker straw residue cover is better. The obverse
Laine, A.H., Mikkola, H.J., Salo, Y.H.
core  

A Meta‐Analysis Reveals That the Protective Role of Silicon in Grasses Against Fungal Pathogens Depends on Infection Mechanism

Plant, Cell &Environment, EarlyView.
ABSTRACT Pathogen infection drives plant community structure and constrains global agricultural productivity. Silicon (Si) improves resistance to abiotic and herbivory stress, particularly in grasses, but relatively little attention has addressed Si‐mediated resistance to pathogens, nor has it tested how this varies according to the type of plant and ...
Sarah J. Thorne, Julia Cooke, Susan E. Hartley   +2 more
wiley   +1 more source

Lignosulfonate as a Strength Additive for Non-Wood Paperboard [PDF]

, 2000
Recycle mills that use old corrugated cardboard (OCC) in their furnish experience difficulties in maintaining the quality of the paperboard produced. Recycle mills using the OCC collect their OCC from many parts of the world.
Martin, Francisco L.
core   +1 more source

Kraft Pulping of Wheat Straw

, 2017
In this paper, pulping of wheat straw with Kraft process was studied. Chemical and morphological properties of wheat straw fibers were also investigated. Chemical properties including cellulose (39.8%), hemicellulose (29.47%), lignin (20.98%), ash (6.27%) and extractives (4.1%) were determined.
openaire   +1 more source