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Ahlgran H.L. First, the care of the soil. In: Grass, The Yearbook of Agriculture USDA, Washington DC. pp. 425-429. 1948

Arledge J. E. Soil conservation in the mountains of Guatemala. In: Soil and Water Conservation News, June. pp. 8-9. 1980

Bennett H.H. Soil Conservation. McGraw-Hill, New York. 993 p. 1939

Bennett H.H. Elements in Soil Conservation. McGraw-Hill, New York. 406 p. 1947

Bosworth D. and Foster A.B. Approved Practices in Soil Conservation. Interstate, Danville, Ill. 488 p. 1982

Bower C.A. and Fireman M. Saline and alkali soils. In: Soil, The Yearbook of Agriculture. USDA, Washington DC. pp. 282-290. 1957

Brown L.R. The worldwide loss of cropland. Worldwatch Paper 24. Worldwatch Institute, Washington DC. 48 p. 1978

Brown L.R. Resource trends and population policy: a time for reassessment. Worldwatch Paper 29. Worldwatch Institute, Washington DC. 55 p. 1979

Brown L.R. Building a Sustainable Society. Norton, New York. 433 p. 1981

Buckman H.O. and Brady N.C. The Nature and Properties of Soils.7th ed. MacMillan, Toronto. 653p.

CEQ. The global 2000 report to the President: entering the 21st century. Vol. 1. Council on Environmental Quality and Department of State, Washington DC. 47 p. 1980

Carter V.G. and Dale T. Topsoil and Civilisation. University of Oklahoma, Norman 292 p. 1955/74
Davidson D.A. Soils and Land Use Planning. Longman, London & New York. 129 p. 1980

Dudal R. An evaluation of conservation needs. In: 9. Soil Conservation: Problems and Prospects. R. P.C. Morgan (ed). Proc. International Conference on Soil Conservation, Silsoe, UK. CIT Press, Cranfield, Bedford, UK. pp. 3-12. 1981

Eckholm E.E. and Brown E.E. Spreading deserts - the hand of man. Worldwatch Paper 13. Worldwatch Institute, Washington DC. 41 p. 1977

FAO. Soil erosion by wind. Agricultural Development Paper No. 71. 4th printing. Rome. 88p. 1978

FAO. Soil erosion by water. Agricultural Development Paper No. 81. 2nd printing. Rome. 284 p. 1978

FAO. Legislative principles of soil conservation. Soils Bulletin 15. Rome. 68 p. 1971

FAO. Project AGL: PD/ROK/67/522, Republic of Korea. Project findings and recomendations. Terminal Report. Rome. 1974

FAO. Shifting cultivation and soil conservation in Africa. Soils Bulletin 24. Rome. 248 p. 1974

FAO. Soil conservation for developing countries. Soils Bulletin 30. Rome. 92 p. 1976

FAO. A framework for land evaluation. Soils Bulletin 32. Rome. 77 p. 1976

FAO. Soil conservation and management in developing countries. Soils Bulletin 33. Rome. 211 p. 1977

FAO. Methodology for assessing soil degradation. Rome. 70 p. 1978

FAO. Watershed development with special reference to soil and water conservation. Soils Bulletin 44. Rome. 257 p. 1979

FAO. Soil and water conservation. Paper prepared for 6th Session, FAO Committee on Agriculture. Rome. 18 p.1980

FAO/UNEP. Report of technical review mission. Project JAM/78/005/Norway. Rome. 1981

Fournier F. Soil conservation. Nature and Environment Series. Council of Europe. 194 p. 1972

Garlitz N.M. SCS provides worldwide conservation assistance. In: Soil & Water Conservation News, February. pp. 1-2. 1981

Gasser W.R. Survey of irrigation in eight Asian nations. Foreign Agriculture Report 165. USDA, Washington DC. 114 p. 1981

GTZ. Key policies and programmes for agricultural development. GTZ, Bonn/Eschborn. 319 p . 1979

GTZ. Outlines of agricultural cooperation. GTZ, Eschborn. 59 p. 1980

Hockensmith R.D. and Steele J.G. Soil erosion, the work of uncontrolled water. Agriculture Bulletin 260 (rev. ). USDA, Washington DC. 16 p. 1971

Hudson N.W. Soil Conservation. 5th ed. Batsford, London. 320 p. 1979

ICRlSAT. New hope for increasing food production in India. In: News from CGIAR 1: 1-8. 1981

IUCN. World conservation strategy. Int. Union for Conservation of Nature and Natural Resources, Gland, Switzerland. 1980

Jung. L. The behaviour of the soil in response to changes in land use. In: Natural Resource and Development. Vol. 5. Federal Institute for Natural Resources, Tubingen. pp. 46-51. 1977

Kellogg C.E. The Soils That Support Us. MacMillan, New York. 370 p. 1956

Kellogg C.E. We seek, we learn. In: Soil, The Yearbook of Agriculture. USDA, Washington DC. pp. 1-11. 1957

Kellogg C.E. and Orvedal A.C. Potentially arable soils of the world and critical measures for their use. Reprinted from Advances in Agronomy, New York . 170 p . 1969

Kemper B. and Derpsch R. Results of studies made in 1978 and 1979 to control erosion by cover crops and no-tillage techniques in Paraná. Brazil. ln: Soil and Tillage Research l, Elsevier, Amsterdam. pp. 253-267. 1981

Kriesberg M. International organizations and agricultural development. Foreign Agriculture Economics Report 131. OICD, USDA, Washington DC. 146 p. 1981

Lowdermilk W.C. Conquest of the land through 7000 years. Agriculture information Bulletin 99, SCS/USDA, Washington DC. 30 p. 1953

McCormack D. and Young K. Technical and societal implications of soil loss tolerance In: Soil Conservation: Problems and Prospects. R. P.C. Morgan (ed). John Wiley, Chichester, UK. pp. 365376. 1981

McDonald A. Early American soil conservationists. Miscellaneous Publication 449. USDA, Washington DC. 62 p. 1941

Morgan R. P.C. Implications. ln: Soil Erosion. M.J. Kirkby and R. P.C. Morgan eds). John Wiley, (London. pp. 253-301. 1980

Rafiq M. The present situation and potential hazard of soil degradation in 10 countries of the Near East region. FAO, Rome. 149 p. 1978

Sampson R.N. Farmland or Wasteland: A Time to Choose. Rodale Press, Emmaus, Pennsylvania. 422 p. 1981

Sheridan D. Desertification of the United States. Council on Environmental Quality, Washington DC. 142 p. 1981

Simon J. The ultimate resource. Princeton University Press, Princeton, New Jersey 415p. 1981

Spurgeon D. The promise of agroforestry. In: American Forests, October 1980. pp. 20-67. 1980

Stocking M. A. Conservation strategies for less developed countries. In: Soil Conservation: Problems and Prospects. R.P.C. Morgan (ed). Silsoe, UK. CIT Press, Cranfield, Bedford, UK. pp. 377384. 1981

Streeter C.P. Reaching the Developing World's Small Farmers. 4th ed. The Rockefeller Foundation, New York. 1975

UNEP. Economic and financial aspects of the plan of action to combat desertification. UN Conference on Desertification, Nairobi. 1977

Williams J.R. et al. Soil erosion effects on soil productivity: a research prospective. In: Journal of Soil and Water Conservation 36:82-90. 1981 p

Wischmeier W. H. Use and misuse of the universal soil loss equation. In: Soil Erosion: Prediction and Control. SCSA. Ankeny, Iowa. pp. 371-378. 1977

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