000			02631cam a2200253 a 4500
020			_a0851991890 (alk. paper)
020			_a9780851991894
082	0	0	_a631.4 _bYOU
100	1		_aYoung, Anthony.
245	1	0	_aAgroforestry for soil management
250			_a2nd Edition.
260			_aNew York : _bCAB International in association with the International Centre for Research in Agroforestry, _c1997.
300			_aviii, 320 p. : _billustrations ;
500			_aRev. ed. of: Agroforestry for soil conservation. 1st ed. c1989.
505			_a1: Preface 2: Agroforestry, soil management and sustainability 3: Effects of trees on soils 4: Soil and water conservation 5: Soil water management 6: Soil organic matter and physical properties 7: Nutrient cycling and nutrient use efficiency 8: The role of roots 9: Agroforestry systems for soil management 10: Modelling 11: Research 12: Agroforestry, land use and the environment 13: Conclusions
520			_aAgroforestry refers to land use systems in which trees or shrubs are grown in association with agricultural crops, or pastures and livestock. From its inception, it has contained a strong element of soil management. Well-designed and managed agroforestry systems have the potential to control run-off and erosion, maintain soil organic matter and physical properties, and promote nutrient cycling. By these means, agroforestry can make a major contribution to sustainable land use. The previous edition of this book, entitled Agroforestry for Soil Conservation (1989), was based on indirect evidence from agriculture, forestry and soil science. The present work provides a new synthesis, drawing on over 700 published sources dating largely from the 1990s. These include both results of field trials of agronomy systems, and research into the plant-soil processes which take place within them. Soil conservation in its narrower sense, the control of erosion, is treated alongside other equally important aspects of soil management, such as nutrient cycling. The new edition summarizes the present state of knowledge and indicates needs for research. It is essential reading for all concerned with agroforestry, whether as students, research scientists, or for practical purposes of development. It is also of interest to soil scientists, agronomists and foresters.
650		0	_aAgroforestry.
650		0	_aSoil conservation.
650		0	_aSoil fertility.
700	1		_aYoung, Anthony.
856	4	2	_uhttp://www.loc.gov/catdir/enhancements/fy0603/97022230-d.html
856	4	1	_uhttp://www.loc.gov/catdir/enhancements/fy0603/97022230-t.html
942			_cREF
999			_c39319 _d39319