TY  - BOOK
AU  - EL-Shiekh,Mervat Mohamed Hamed
TI  - The effect of using nonprotein nitrogen in feeding dairy cattle on some productive and reproductive traits
PY  - 1991///
KW  - Nitrogen in animal nutrition
KW  - Dairy cattle
KW  - Productivity
KW  - Proteins in animal nutrition
KW  - Urea as feed
N1  - Thesis (Ph.D. )-- El-Mansoura University, 1991; Includes bibliographical reference (leaves 150-183); Microfiche; Cairo, Egypt; ASUNET; 4 microfiche : negative
ER  -