Inorganic Plant Nutrition.
Crop spraying.
Crop sprayers.
Crop production.
Crop sprayers Merlin.
Field Crop Abstracts.
Respiration and crop produktivity /
Diseases of Vegetable Crops.
Crops in peace and war.
Rabbits in relation to crops.
The production of field crops.
Diseases of field crops.
Physiological genetics of agricultural crops /
Biochemical Analysis in Crop Science /
The private life of plants.: the complete series, disc 1.
The private life of plants.: the complete series, disc 2.
Plant and soil : international journal of plant nutrition, plant chemistry, soil microbiology and soil-borne plant diseases.
Chemicals for crop improvement and pest management /
Cultural practices and infectious crop diseases /
Yield formation in the main field crops. /