Results 41 to 50 of about 16,072 (233)

Impacts of reindeer grazing on phosphorus sorption and nutrient availability in a tundra site

Oikos, EarlyView.
Reindeer Rangifer tarandus, a large circumpolar herbivore, can influence whether nitrogen (N) or phosphorus (P) is the primary limiting nutrient in tundra plant communities. Specifically, findings from a site in northern Scandinavia suggest that under conditions where reindeer grazing stimulates inorganic N availability, grazing may drive ecosystems ...
Jerzy Szejgis, Johan Olofsson, Henni Ylänne, Michael J. Gundale, Reiner Giesler, Maja K. Sundqvist   +5 more
wiley   +1 more source

Circular 66 [PDF]

, 1989
Phosphorus (P) along with nitrogen (N) and potassium (K) comprise the three macronutrients most frequently added as fertilizer for growing plants. In Alaska soils, P is often the second most limiting nutrient after N. A proper supply of plant-available
Michaelson, Gary J., Ping, Chien Lu
core  

Implementing potential climate‐smart practices through diverse partnerships

PLANTS, PEOPLE, PLANET, EarlyView.
Climate change is one of the greatest threats to society, negatively impacting agriculture and crop yields. Globally, agriculture is also one of the largest greenhouse gas (GHG) emitting sectors. Climate‐smart practices that are developed through diverse partnerships with scientists and practitioners are needed to decrease GHG emissions. We implemented
Kristina J. Bartowitz, Justin M. Mathias, Eric S. Walsh, Laurel M. Lynch, Chloe Arthaud, Stefanie Krantz, Tara W. Hudiburg   +6 more
wiley   +1 more source

Disponibilidade de cobre para mudas de eucalipto em solos de cerrado

Revista Brasileira de Ciência do Solo, 2010
No Brasil, com a intensificação da silvicultura clonal, o plantio de materiais genéticos mais produtivos e exigentes nutricionalmente tem aumentado o aparecimento de sintomas de deficiência de micronutrientes, principalmente de B e, mais recentemente, de
Fernando Antonio Vieira Rodrigues, Nairam Félix de Barros, Júlio César Lima Neves, Víctor Hugo Alvarez V., Roberto Ferreira Novais   +4 more
doaj   +1 more source

Crop genotypic richness enhances biomass production and phosphorus acquisition in maize‐mycorrhiza symbiosis

PLANTS, PEOPLE, PLANET, EarlyView.
Our study tests how soil and plant biodiversity can enhance sustainability of crop production in Kenya. We tested whether mixtures of maize varieties performed better than monocultures and tested their response to arbuscular mycorrhizal fungi. Mycorrhizal responsiveness differed significantly by maize variety, and genetic mixtures outperformed ...
Grace Ng'endo Kanyita, Ezekiel Mugendi Njeru, Henry Birt, David Johnson   +3 more
wiley   +1 more source

Extração de cobre e de zinco por soluções multielementares em solos do sul do Brasil Copper and zinc extracted by multielement solution for Southern Brazilian soils

Ciência Rural, 2010
As quantidades extraídas de cobre (Cu) e de zinco (Zn) pelas soluções de HCl 0,1mol L-1 (HCl) foram comparadas com as extraídas pelas soluções de Mehlich-1 (M1) e de Mehlich-3 (M3).
Leandro Bortolon, Clesio Gianello
doaj  

Ácido ascórbico como agente redutor para determinação de fósforo por colorimetria

Ciência Rural, 2014
Em muitos laboratórios de análises de solos, o ácido 1-Amino-2-naftol-4-sulfônico (ANS) é usado como agente redutor para determinação do P por espectrometria de UV/Visível.
Lenio da Silva Santos, Leandro Souza da Silva, Gustavo Griebeler   +2 more
doaj   +1 more source

Evaluation of manganese and iron availability in soils by a modified ion exchange resin method [PDF]

, 2004
[Resumo] A avaliação do método modificado da resina de troca de íons para extração de Mn e Fe dos solos foi o objetivo desta pesquisa. Foram utilizadas 44 amostras de solo, cujos teores de Mn variaram de baixos a altos e de Fe de médios a altos.
Abreu, Cleide Aparecida, Paz González, Antonio, Raij, B. Van   +2 more
core   +1 more source

Do position and species identity of neighbours matter in 8–15-year-old post harvest mesic stands in the boreal mixedwood? [PDF]

, 2010
Neighbourhood competition indices (NCI), where position and species identity of neighbours are known, have been used to investigate growth and competitive interactions among adult trees.
Alain Paquette, Balandier, Bella, Brais, Burnham, Callaway, Canham, Canham, Carter, CEGFPQ, Christian Messier, Claveau, Coates, Delagrange, Dubois, Edwards, Fahey, Filipescu, Frey, Frédéric Boivin, Goffe, Haeussler, Hegyi, Hubbell, Humbert, Larocque, Lieffers, Lieffers, Lorimer, Mallik, McKeague, Mehlich, Michael J. Papaik, MRNF, Nelson Thiffault, Papaik, Pinno, Pueyo, Robitaille, Ruel, Saucier, Simard, Stadt, Tierney, Tilman, Uriarte, Valladares, Woods   +47 more
core   +1 more source

Why raw yield data are better than relative yield in informing agronomic and economic decisions

Agricultural &Environmental Letters, Volume 11, Issue 1, June 2026.
Abstract While relative yield is widely used for its comparability, normalization can cause significant information loss. This study reframes yield metric selection as a model evaluation problem to determine the most accurate representation of crop response. We evaluated seven yield metrics with three agronomic models, comparing estimates of a critical
Falin Sun, Wenying Li, Joshua M. Duke, Joshua M. McGrath, Vaughn Reed   +4 more
wiley   +1 more source