Results 171 to 180 of about 507,246 (381)

Effects of permafrost degradation on alpine grassland in a semi-arid basin on the Qinghai–Tibetan Plateau [PDF]

open access: gold, 2011
Shuhua Yi   +6 more
openalex   +1 more source

Legacy Knowledge on Landscape Soil Carbon—Concentrated Organic Input to Selected Sites Comes With the Expense of Soil Health of Larger Areas

open access: yesJournal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Xu et al. show that high organic input and N‐balancing fertilization improve soil health at the soil plot scale; however, the effects of allocating C and N on soil health at the landscape or region scale are not considered. Historical soil management systems show that such a depletive redistribution leads to local agricultural improvements ...
Christian Ahl
wiley   +1 more source

Lepidoptera – A Baseline Study [PDF]

open access: yes, 2003
To provide a benchmark view of the species of butterflies and moths present at Sheepdrove Organic Farm, using repeatable, well-known methods to produce a set of results which can be referred to, and compared in ...
Ball, Jason
core  

Geochronology of the Whittlesey sedimentary succession, eastern England: The ‘Pompeii’ of the British late Middle Pleistocene to Holocene record

open access: yesJournal of Quaternary Science, EarlyView.
Abstract The sedimentary succession at Whittlesey preserves a unique British late Middle Pleistocene to Holocene record back to a time equivalent to at least marine oxygen isotope stage 8 (ca. 250 ka). This study builds on previously published sedimentology, geochronology and palaeoecology results to establish 20 sedimentary facies associations, with ...
H. E. Langford   +3 more
wiley   +1 more source

Nitrogen fertilizer requirements of silage maize and sorghum–sudangrass grown after 4 years of alfalfa production in a semi‐arid environment

open access: yesGrassland Research
Background This 2‐year study sought to determine the influence of N application rates following alfalfa termination on biomass production and quality of the succeeding crops of maize (Zea mays L.) and sorghum–sudangrass (Sorghum bicolor (L.) Moench ...
Juan K. Q. Solomon   +2 more
doaj   +1 more source

Grassland management impacts on soil carbon stocks: a new synthesis.

open access: yesEcological Applications, 2017
R. Conant   +3 more
semanticscholar   +1 more source

Raman Signature of the Wings of the Globe Skimmer Dragonfly: Pantala flavescens

open access: yesJournal of Raman Spectroscopy, EarlyView.
Raman spectroscopy is used to confirm the presence of aliphatic and aromatic hydrocarbons and related derivatives including aldehydes, halides, alcohols, acids, esters, and phenols on the wings of Pantala flavescens. The analysis indicates that wing‐surface lipid composition is largely consistent across the three main ecological zones in Ghana. Notably,
Rachel Desulme   +19 more
wiley   +1 more source

The importance of collaboration, interdisciplinarity, and transdisciplinarity in grassland research

open access: yesGrassland Research
Grasslands are among the most biodiverse and ecologically important ecosystems, and yet, they are increasingly threatened by land‐use intensification and biodiversity loss.
Margarita Hartlieb
doaj   +1 more source

Estimation of environmental impact of conversion to organic agriculture in Hamburg using the Life-Cycle-Assessment method [PDF]

open access: yes, 2005
Commissioned by the Ministry of Environment of Hamburg, Germany, an environmental impact assessment using the Life-Cycle Assessment (LCA) method was carried out during 1995 and 1996. In a scenario, the effect of a complete transition from conventional to
Frieben, Bettina   +3 more
core  

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