For millennia, irrigation has been one of the main driving forces of civilization. Given that the world human population is estimated to reach 9 billion in the next 40 years, irrigation is going to be a key factor in food security. However, irrigation makes use of slowly renewable or just...

Increasing the efficiency of conversion of feed nitrogen (N) into milk and meat N in dairy cattle is an integral part of the effort to maintain or increase food production while decreasing agriculture's environmental impact. Mathematical models provide a means to assess and compare different...

Can organic agriculture elaborate a scientifically based, resource-efficient and agroecological approach to low-input farm management? This review examines the literature from temperate regions, with a particular emphasis on Canadian and US studies that relate to environmental and ecological...

On organic farms, nutrients are applied in organic or sparingly soluble inorganic form, with plants receiving the nutrients they require indirectly through the action of soil microbes. This review examines the implications of exclusive use of organic fertilizers for the sustainability of farming...