Results 101 to 110 of about 222,763 (289)
American Journal of Agricultural Economics, EarlyView.Abstract While multiple factors explain low adoption rates of improved varieties by small‐scale farmers in sub‐Saharan Africa, a key supply‐side constraint is the limited availability of seed embodying new traits in the volume, quality, price, and timeliness required by farmers. This constraint is partly attributable to classical failures in the market
Dawit Mekonnen +5 more
wiley +1 more source
Climate change and perennial crop production: Evidence of yield impact and adaptation in California
American Journal of Agricultural Economics, EarlyView.Abstract Perennial crops are economically important. They contribute to food security, providing essential nutrients that are often lacking in annual crops, and provide additional environmental benefits compared with annual crops. Despite their importance, empirical research on the impacts of climate change and adaptation on perennial crops remains ...
Yuanyuan Wen +2 more
wiley +1 more source
Essais de régénération mécanique de quelques parcours sahéliens dégradés
Revue d’Elevage et de Médecine Vétérinaire des Pays Tropicaux, 1977 Une dégradation importante de la végétation sahélienne, surtout depuis la sécheresse, se manifeste dans certaines régions du nord de la Haute-Volta, très chargées en bétail, entraînant la diminution des potentialités pastorales et menaçant le milieu lui ...
Bernard Toutain
doaj +1 more source
High‐elevation endemic plants predicted to lose habitat from changing climate in Washington State
American Journal of Botany, EarlyView.Abstract Premise High‐elevation plants face unique challenges from potential climate change impacts that will likely require upslope migration into increasingly smaller suitable habitat. This situation is particularly acute for endemic species that by definition occupy small geographic ranges.
Nicholas L. Gjording +4 more
wiley +1 more source
Organes de végétation des mousses
, 1889 Debat M. Organes de végétation des mousses. In: Bulletin mensuel - Société botanique de Lyon, tome 7, bulletin 1, 1889.
Debat, Louis
core +1 more source
, 2003 The Lund–Potsdam–Jena Dynamic Global Vegetation Model (LPJ) combines process‐based, large‐scale representations of terrestrial vegetation dynamics and land‐atmosphere carbon and water exchanges in a modular framework.
S. Sitch +11 more
semanticscholar +1 more source
American Journal of Botany, EarlyView.Abstract Premise Changing climates are leading to more frequent and severe heat waves, potentially threatening plant populations. Both acclimation to stress and selection for heat‐escape or heat‐resistance phenotypes occur during heat waves. However, plastic responses and selection do not necessarily interact cohesively—even producing trait responses ...
Lana F. Gaspard +4 more
wiley +1 more source
The mark of vegetation change on Earth’s surface energy balance
Nature Communications, 2018 Changing vegetation cover alters the radiative and non-radiative properties of the surface. The result of competing biophysical processes on Earth’s surface energy balance varies spatially and seasonally, and can lead to warming or cooling depending on ...
Gregory Duveiller +2 more
semanticscholar +1 more source
American Journal of Botany, EarlyView.Abstract Premise Desert plant assemblages in southern California provide an opportunity to link patterns of community structure with climate‐driven vulnerability in a rapidly changing environment. California sustains an exceptionally diverse flora of approximately 4300 plant species, with 31% identified as endemic.
Hector Zumbado‐Ulate +4 more
wiley +1 more source
Les échanges d'eau sol-végétation-atmosphère
, 2015 Première partie- chapitre 9Les échanges d'eau sol-végétation ...
Tuzet, Andree, Brunet, Yves
core +2 more sources