Agriculture in North America is. highly integrated with the other sectors of the economy through markets for farm inputs,' farm products, consumer goods, and labor; During the early 1950s, and to a-iesser-extent during the early 1980s, farm households incomes were depressed-relative to nonfarm household incomes. The reasons"were primarily that the-'supply curve for agricultural products had bee...

BACKGROUND The semi-arid environments harbor nearly 40% of biodiversity, and half of indigenous cultures of Mexico. Thousands of communities settled in these areas depend on agriculture and using wild biodiversity for their subsistence. Water, soil, and biodiversity management strategies are therefore crucial for people's life. The tajos, from Sierra Gorda, are important, poorly studied, biocul...

Temporary wetlands dominate the wet season landscape of temperate, semi-arid and arid regions, yet, other than their direct loss to development and agriculture, little information exists on how remaining wetlands have been altered by anthropogenic conversion of surrounding landscapes. This study investigates relationships between the extent and type of habitat transformation around temporary we...