Results 111 to 120 of about 319,002 (336)

Grass functional traits reflect the long history of fire and grazers in the savannas of Texas

American Journal of Botany, EarlyView.
Abstract Premise Understanding relationships among grass traits, fire, and herbivores may help improve conservation strategies for savannas that are threatened by novel disturbance regimes. Emerging theory, developed in Africa, emphasizes that functional traits of savanna grasses reflect the distinct ways that fire and grazers consume biomass ...
Ashish N. Nerlekar, Daniel Spalink, Joseph W. Veldman   +2 more
wiley   +1 more source

Comparing different machine‐learning techniques to date Nile Delta sediments based on portable X‐ray fluorescence data

Geoarchaeology, Volume 38, Issue 1, Page 57-75, January/February 2023., 2023
Abstract Geomorphology generally aims to describe and investigate the processes that lead to the formation of landscapes, while geochronology is needed to detect their timing and duration. Due to restrictions on exporting geological samples from Egypt, modern geoscientific studies in the Nile Delta lack the possibility of dating the investigated ...
Martin Seeliger, Andreas Ginau, Marina Altmeyer, Pascal Neis, Robert Schiestl, Jürgen Wunderlich   +5 more
wiley   +1 more source

Microbial Community Behaviour in The Rhizosphere of Kilemo (Litsea cubeba L. Pers) After Pruning

Jurnal Manajemen Hutan Tropika, 2016
Pruning is a removing some parts of the tree canopy, either for improving tree shape or increasing shoot productivity. It can be implemented in yield management of commodities that are harvested its shoot biomass, such as tea or kilemo.
Enny Widyati
doaj  

Sparse Attention Regression Network Based Soil Fertility Prediction With Ummaso [PDF]

arXiv
The challenge of imbalanced soil nutrient datasets significantly hampers accurate predictions of soil fertility. To tackle this, a new method is suggested in this research, combining Uniform Manifold Approximation and Projection (UMAP) with Least Absolute Shrinkage and Selection Operator (LASSO).
arxiv  

Quasi-steady uptake and bacterial community assembly in a mathematical model of soil-phosphorus mobility [PDF]

arXiv, 2019
We mathematically model the uptake of phosphorus by a soil community consisting of a plant and two bacterial groups: copiotrophs and oligotrophs. Four equilibrium states emerge, one for each of the species monopolising the resource and dominating the community and one with coexistence of all species.
arxiv  

Strategies to improve quality and safety and reduce cost of peroduction in organic and low-input crop production systems [PDF]

, 2009
Organic crop production seeks to produce high quality foods while reducing the inputs in order to promote environmental quality and conserve resources. This necessitates optimal production systems in terms of soil fertility and plant health.
Lucius, Tamm
core  

Plastics of the Future? Interdisciplinary Review on Biobased and Biodegradable Polymers: Progress in Chemistry, Societal Views, and Environmental Implications

Angewandte Chemie International Edition, Accepted Article.
Global demand to reduce polymer waste and microplastics pollution has increased in recent years, prompting further research, development, and wider use of biodegradable and biobased polymers (BBPs). BBPs have emerged as promising alternatives to conventional plastics, with the potential to mitigate the environmental burdens of persistent plastic waste.
Sara T. R. Velasquez, Qisong Hu, Johanna Kramm, Vitoria C. Santin, Carolin Völker, Frederik Roman Wurm   +5 more
wiley   +1 more source

The local health impacts of natural resource booms

Health Economics, Volume 32, Issue 2, Page 462-500, February 2023., 2023
Abstract This paper uses novel micro‐data on natural resources and administrative health data in Brazil to study how economic booms in minerals affect health at birth. By implementing a reduced‐form estimation of shift‐share research designs, the identification strategy relies on the exogeneity of global commodity prices to municipality‐specific health
Elisa M. Maffioli
wiley   +1 more source

The effect of some heavy metals on oats in a pot experiment with three different soil types

Agricultural and Food Science, 1974
An account is given of a pot experiment comprising all combinations of 5 heavy metals (cadmium, cobalt, lead, mercury and nickel), 3 rates of each metal (0, 50 and 250 mg/pot), 2 rates of lime, and 3 types of soil (clay soil, peat soil, and sandy soil ...
Asbjørn Sorteberg
doaj  

A dynamic and stochastic analysis of fertilizer use in swidden agriculture [PDF]

The number of times a crop can be harvested on a cleared parcel of forest land (CPFL) before this land must be fallowed is dependent on the decision to use or not to use fertilizers to enhance soil fertility.
Amitrajeet Batabyal, Gregory DeAngelo
core