Crop productivity.

Manylion Llyfryddiaeth
Awduron Corfforaethol:	BIOTOL (Project), Open Universiteit (Heerlen, Netherlands), University of Greenwich
Fformat:	Llyfr
Iaith:	Saesneg
Cyhoeddwyd:	Oxford, Boston Butterworth-Heinemann 1994.
Cyfres:	Biotechnology by Open Learning (Series)
Pynciau:	Agricultural productivity > Programmed instruction. Crop yields > Programmed instruction.