1. Farmland or wasteland :a time to choose : overcoming the threat to America's farm and food future

پدیدآورنده :

کتابخانه: كتابخانه مركزی كشاورزى (تهران)

موضوع : $ASoil conservation -- United States,$AAgriculture -- United states,$AWater$Bsupply, Agricultural -- United States,$AAgricultural conservation$BUnited States,$AAgriculture and state$BUnited States,$ALand use, Rural$BUnited States,$AWater conservation$BUnited States

رده :
S
624
.
A1
S22