Results 161 to 170 of about 269,930 (290)

A case study of transport of tropical marine boundary layer and lower tropospheric air masses to the northern midlatitude upper troposphere [PDF]

open access: yes, 2000
Low-ozone (<20 ppbv) air masses were observed in the upper troposphere in northern midlatitudes over the eastern United States and the North Atlantic Ocean on several occasions in October 1997 during the NASA Subsonic Assessment, Ozone and Nitrogen ...
Blake, DR   +14 more
core  

Tropical medicine in and out of the tropics

open access: yesThe Lancet, 1996
D.J. Weatherall   +20 more
openaire   +3 more sources

Examining the Impact of Row Planting on Labor Use for Sustainable Food Production Among Maize Farmers in Rural Ghana

open access: yesAgribusiness, EarlyView.
ABSTRACT Smallholder farmers are reverting to traditional production methods due to the high opportunity costs and unintended consequences of new technologies. This study focuses on row planting technology, which is labor‐intensive and slow without mechanized operations.
Emmanuel Tetteh Jumpah   +4 more
wiley   +1 more source

Validation of sorghum quality control (QC) markers across African breeding lines

open access: yesThe Plant Genome
Sorghum [Sorghum bicolor (L.) Moench] is a cereal crop of critical importance in the semi‐arid tropics, particularly in Africa where it is second only to maize (Zea mays L.) by area of cultivation.
Davis M. Gimode   +11 more
doaj   +1 more source

Economic Feasibility of Crop‐Livestock Integration System in Brazil

open access: yesAgribusiness, EarlyView.
ABSTRACT We investigate the economic feasibility of the Brazilian crop‐livestock integration system. Under this system, the Brazilian farmer can produce soybeans, corn, and graze for cattle on the same land during one crop year. This technology can substantially increase agricultural production in the country.
Yuri C. D. Calil, Luis Ribera
wiley   +1 more source

Report on the Desertification Convention [PDF]

open access: yes, 1994
Report by ICRISAT on its participation on behalf of the CGIAR in the negotiations between May 1993 and June 1994 leading to the International Convention to Combat Desertification, itself an outgrowth of UNCED. ICRISAT cited the Desert Margins Initiative,
International Crops Research Institute for the Semi-Arid Tropics
core  

AInsectID Version 1.1: An Insect Species Identification Software Based on the Transfer Learning of Deep Convolutional Neural Networks

open access: yesAdvanced Intelligent Discovery, EarlyView.
This paper describes the basis for AInsectID Version 1, a GUI‐operable open‐source insect species identification, color processing, and image analysis software. This paper discusses our methods of algorithmic development, coupled to rigorous machine training used to enable high levels of validation accuracy.
Haleema Sadia, Parvez Alam
wiley   +1 more source

When the sand blossoms: Phylogeny, trait evolution, and geography of speciation in Linanthus

open access: yesAmerican Journal of Botany, Volume 112, Issue 3, March 2025.
Abstract Premise Understanding how plants successfully diversified in novel environments is a central question in evolutionary biology. Linanthus occurs in arid areas of western North America and exhibits extensive floral trait variation, multiple color polymorphisms, differences in blooming time, and variation in life history strategies.
Ioana G. Anghel   +3 more
wiley   +1 more source

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