00493nam a2200181Ia 4500008004100000020001500041082001600056100001200072245005100084260003200135300000800167650004100175650003400216653001000250700001500260700001800275700001800293170901s1998    xx            000 0 und d  a084937443x  a631.4bL14M  aLal, R. 0aMethods for the Assessment of Soil Degradation  aBoca RatonbCRC Pressc1998  a558  aAgriculture and related technologies  aTechnology (Applied sciences)  aSoils  aBlum, W.H.  aStewart, B.A.  aValentine, C.