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U. S. Geological Survey , Bulletin 1241 - I . 37 p . WEAVER , J. E. and HARMON , G. W. Quantity of living plant materials in prairie soils in relation to run - off and soil erosion . braska University Conservation Bulletin 8 , 1935 . | |
 | Fernando Suárez de Castro - 1956 - 346 páginas
Technical Bulletin no . 178. ... Columbia , Missouri Agricultural Experi- ment Station , Research Bulletin no . 280. ... POWERS , W. L. , JONES , J. S. y RUZEK , C. V. Composition , rating and conservation of Willamette valley soils . | |
 | Iica - 544 páginas
BULLETIN . Institut Haitien de Promotion du Cafe et des Dendrees D'Exportation ( HAITI , Port - au - Prince ) v . ... International Union for Conservation of Nature and Natural Resources ( SUIZA ) B : 10 , 4 , 6-12 ( 1979 ) ; 11 , 1-10 ... | |
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Lamtoronisasi : an experiment in soil conservation . Bulletin of Indonesian Economic Studies 12 ( 1 ) : 103-109 . * MISHRA , C.M .; SRIVASTAVA , R.J .; SINGH , S.L. 1986. Pattern of biomass accumulation and productivity of Leucaena ... | |
 | 1980 - 284 páginas
Bulletin of the Faculty of Agriculture 3036 . Eulletin of the Imperial ... Commodity Bulletin - New South Wales Department of Agriculture Division of Marketing and Economics ( Australia ) 2169 . ... Conservation Foundation Letter 4591 . | |
 | Pieter Grijpma - 1973 - 170 páginas
Michigan University , School of Forest ry and Conservation . Bulletin no . 7. 1939. 87 p . ( F.A.1 : 40 ) ( 816 LAKHANPAL , R. N. y NAIR , P. K. K. Survey of the atmospheric pollen at Luck now . Journal of Scientific and Industrial ... | |
 | Arturo Martinez - 2004 - 196 páginas
... F - 84914 Avignon Cedex 9 ; 2 CESSA , 11 bd National , F - 13001 Marseille Conservation of genetic resources and management of biodiversity are at stake for many years . ... Bulletin Horticole ( 10 ) , MAAF ( Ed ) , Paris , 26-35 . | |
 | Cecilia Petraglia - 1982 - 196 páginas
HELD , B y CLAWSON , M. Soil Conservation in Perspective . 380 p . Maryland , John Hopkins , 1965 . ... Legislative principles of soil conservation . Soils Bulletin no . 15 , 1971. 68 p . Roma , FAO -SUBCOR 52 i 21 . 22 . 23 . | |
 | Rodolfo Salazar - 1989 - 202 páginas
Technical Bulletin . 1138. U.S.A. Dept. Agriculture . 35 p . Read , R. 1964. Tree windbreaks for the central great plains . Agric handbook << = . N.250 . Forest Service . 40 p . Ferber , A. 1969. Windbreak for conservation . | |
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