共 50 条
- [2] Effect of pasture management on the contributions of fixed N to the N economy of ley-farming systems [J]. AUSTRALIAN JOURNAL OF AGRICULTURAL RESEARCH, 1998, 49 (03): : 459 - 474
- [4] ECOLOGICAL LAND-USE THROUGH LEY-FARMING WITH ANNUAL, SELF-REGENERATING LEGUMES [J]. TROPENLANDWIRT, 1989, 90 : 27 - 41
- [10] THE ORIGINS OF AMERICAN AGRICULTURAL POLICY - LONG-TERM GROWTH AND CRISIS [J]. ETUDES INTERNATIONALES, 1981, 12 (01): : 89 - 101