01 មករា 2003 This book attemps not only to present conservation tillage country papers but also to raise critical issues and options on the transition to conservation tillage. It provides the basis for a conceptual framework on conservation tillage as a production system. It also represents the shift in...
01 មិថុនា 1984 FAO of the United Nations has as its objective to present the principles and practices of tillage systems for sustained food production and to create an awareness of the need to conserve the world's soil, water and energy resources for future generations.