TY - BOOK AU - Lal, R AU - Stewart, B A TI - Soil management : : experimental basis for sustainability and environmental quality SN - 9781566700764 U1 - 631.4 PY - 1995/// CY - Boca Raton PB - CRC press taylor and francis group KW - Sustaining agricultural production KW - Humid tropics KW - Soil alterations in perennial pasture KW - Sustainable management of alfisols and ultisols KW - Yield decline and the nitrogen economy ER -