TY  - JA
AU  - El Hassan,G.A.
AU  - Mukhtar,N.O.
TI  - Effect of four herbicides on nitrification in Gezira soil [Sudan]
U1  - 91-084353 
PY  - 1991///
KW  - Africa
KW  - Africa south of Sahara
KW  - Arab countries
KW  - Cycling
KW  - East Africa
KW  - Inorganic acid salts
KW  - Pesticides
KW  - AGROVOC
KW  - Salts
KW  - Soil biology
N1  - 2 tables. Summary (En) ARC, POB 126, Wad Medani - Sudan
T2  - Annual Report of the Gezira Agric. Research Station (Sudan). 1986-87. (Feb 1991). p. 104-108
ER  -