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2
-
Grain production and assimilate utilization of wheat in relation to cultivar characteristics, climate factors and nitrogen supply / J.H.J. Spiertz.
- Centre for agricultural publishing and documentation (PUDOC),
- 1978.
- Wageningen :
-
Huishoudkunde in Nederland / A. C. L. Zuidberg.
- H. Veenman and Zonen B.V.,
- 1978.
- Wageningen :