Zobrazeno 1 - 10
of 131
pro vyhledávání: '"Robert J, Hijmans"'
Publikováno v:
PLoS ONE, Vol 18, Iss 9, p e0291753 (2023)
We describe changes in the cropland distribution for physiographic and bioregions of continental Ecuador between 2000 and 2016 using Landsat satellite data and government statistics. The cloudy conditions in Ecuador are a major constraint to satellit
Externí odkaz:
https://doaj.org/article/44db286d1981454ea9b0129f3beaec51
Autor:
Erica M Rettig, Robert J Hijmans
Publikováno v:
PLoS ONE, Vol 17, Iss 9, p e0272909 (2022)
Women's empowerment is a fundamental human right but attempts to measure progress in this area have been limited. We used 142 nationally representative surveys to quantify empowerment in six domains (Intimate Partner Violence, Family Planning, Reprod
Externí odkaz:
https://doaj.org/article/6cd8008b751048869c1df2c19d0ddbb5
Publikováno v:
PLoS ONE, Vol 16, Iss 10, p e0258215 (2021)
Agricultural index insurance contracts increasingly use remote sensing data to estimate losses and determine indemnity payouts. Index insurance contracts inevitably make errors, failing to detect losses that occur and issuing payments when no losses
Externí odkaz:
https://doaj.org/article/a33d18889a514c96a63df23a9a6f1e7a
Publikováno v:
Heliyon, Vol 6, Iss 5, Pp e03829- (2020)
Improving female empowerment is an important human rights and development goal that needs better monitoring. A number of indices have been developed to track female empowerment at the national level, but these are incomplete and may obscure important
Externí odkaz:
https://doaj.org/article/bc7c8d785757441e95d8ac4de47044c9
Autor:
Kate Tiedeman, Jordan Chamberlin, Frédéric Kosmowski, Hailemariam Ayalew, Tesfaye Sida, Robert J. Hijmans
Publikováno v:
Remote Sensing, Vol 14, Iss 9, p 1995 (2022)
Crop yield estimation from satellite data requires field observations to fit and evaluate predictive models. However, it is not clear how much field data collection methods matter for predictive performance. To evaluate this, we used maize yield esti
Externí odkaz:
https://doaj.org/article/f66ce8af08f64ea386a619722feb7691
Publikováno v:
Environmental Research Letters, Vol 17, Iss 4, p 044071 (2022)
High levels of crop species diversity are considered beneficial. However, increasing diversity might be difficult because of environmental constraints and the reliance on a few major crops for most food supply. Here we introduce a theoretical framewo
Externí odkaz:
https://doaj.org/article/a9527c5468e641718c3cef21a87a32a8
Autor:
Elise Hellwig, Robert J. Hijmans
Publikováno v:
International Journal of Digital Earth, Vol 10, Iss 11, Pp 1166-1176 (2017)
The mean height-for-age Z-score (HAZ) of children under five is an important indicator of the health status of a population. HAZ values are frequently aggregated and reported at the national level, potentially obscuring important within-country varia
Externí odkaz:
https://doaj.org/article/1b57e9e0691f408b8edcaecb15e59f4c
Publikováno v:
PLoS ONE, Vol 15, Iss 1, p e0227764 (2020)
Low crop yields in Sub-Saharan Africa are associated with low fertilizer use. To better understand patterns of, and opportunities for, fertilizer use, location specific fertilizer price data may be relevant. We compiled local market price data for ur
Externí odkaz:
https://doaj.org/article/0702dec1e84b44f595f7ccd8929593e9
Autor:
Lee Hannah, Patrick R Roehrdanz, Krishna Bahadur K C, Evan D G Fraser, Camila I Donatti, Leonardo Saenz, Timothy Max Wright, Robert J Hijmans, Mark Mulligan, Aaron Berg, Arnout van Soesbergen
Publikováno v:
PLoS ONE, Vol 15, Iss 2, p e0228305 (2020)
Growing conditions for crops such as coffee and wine grapes are shifting to track climate change. Research on these crop responses has focused principally on impacts to food production impacts, but evidence is emerging that they may have serious envi
Externí odkaz:
https://doaj.org/article/fc98cb62d53b45e2849e1e0d207d043b
Publikováno v:
Remote Sensing, Vol 12, Iss 9, p 1522 (2020)
Obtaining detailed data on the spatio-temporal variation in crop phenology is critical to increasing our understanding of agro-ecosystem function, such as their response to weather variation and climate change. It is challenging to collect such data
Externí odkaz:
https://doaj.org/article/23e97ba047824355983c42c4527c43a0