TY  - BOOK
AU  - Christie, J.M.
AU  - Hamilton, G.J.
TI  - Influence of spacing on crop characteristics and yield
SN  - 0117101443
U1  - 634.9532 21st ed.
PY  - 1974///
CY  - London
PB  - Her Majestys Stationery Office
KW  - Crop density
KW  - Spacing
KW  - Thinning
KW  - Yields
N1  - Forestry commission Bulletin no. 52
ER  -