TY  - BOOK
AU  - Whitehead, D. C.
TI  - The role of nitrogen in grassland productivity: : a review of information from temperate regions
T2  - Bulletin
U1  - 633.2 
PY  - 1970///
CY  - Huyley, Berkshire, England
PB  - Commonwealth Bureau of Pastures and Field Crops
KW  - Fertilizantes nitrogenados
KW  - Nitrógeno
KW  - Efecto en pastos
KW  - Pastizales
N1  - Bibliografía, p. 162-195
ER  -