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Bulletin P

Volume 1

Number 1
December 1931
Colt production in Iowa

Number 2
February 1940
1939 Iowa corn yield test

Number 3
February 1940
Fur-bearers and game mammals of Iowa

Number 4
December 1941
Quality lamb production

Number 5
March 1940
Seasonal market variations and their importance to Iowa farmers

Number 6
March 1940
Effect of spacing and length of harvesting on yields of asparagus

Number 7
January 1941
Grape training and pruning in Iowa

Number 8
March 1940
Pasture improvement and management

Number 9
March 1941
Rubber-tiring farm machines

Number 10
April 1940
Pruning fruit trees

Number 11
April 1940
Contour farming for soil and water conservation

Number 12
May 1940
Gladiolus culture in Iowa

Number 13
June 1940
Electric motors for the farm

Number 14
July 1940
House plants

Number 15
August 1940
Sweet corn hybrids

Number 16
September 1940
Capons in Iowa

Number 17
October 1940
Ponds for farm water supply

Number 18
January 1941
Principal potato insects of Iowa and their control

Number 19
February 1941
The 1940 Iowa corn yield test

Number 20
February 1941
Planning the cattle feeding program

Number 21
December 1941
The challenge to democracy I. Democracy on trial

Number 22
June 1941
The challenge to democracy II. The citizen and the power to govern

Number 23
June 1941
The challenge to democracy III. The family farm in the machine age

Number 24
August 1941
The challenge to democracy IV. The test of citizenship

Number 25
August 1941
The challenge to democracy V. Democracy and nationalism

Number 26
October 1941
The challenge to democracy VI. Toward a new rural statesmanship

Number 27
February 1942
The challenge to democracy VII. Improving public administration

Number 28
September 1942
The challenge to democracy VIII. The machine and democracy