00699cam a22002177a 4500003000500000005001700005008004100022010001000063011001000073020001500083035001000098040000900108100001600117245014200133260008100275300001900356650005000375650002200425650002000447700001400467CHAP20220329142535.0010920d1997    nl a    r     00110 eng d  a84700  a85672  a9290663650  a96207  cCHAP00aBrouwer, J.10aSoil and crop growth variability in the Sahel :bhighlights of research (1990-95) at ICRISAT Sahelian Centerc/by J. Brouwer and J. Bouma  aWageningen, The Netherlands :bAgricultural University of Wageningen,c1997.  a42 p. :bilus.14aAgriculturaxInvestigaciónxAfricazAfrica.14aCultivosxAfrica.14aSueloszAfrica.0 aBouma, J.