Economists measure the influence of variety improvements, fertilizer application, regional specialization and other crop yield factors for seven major United States crops.

This is the year of "space." You hear a great deal about outer space, but sometimes it's the inner space, or the space in your home, that causes the most concern.

In recent years, a number of new varieties have been developed which increase the reliability of everbearing plantings. Here are descriptions of the newer varieties plus information on best cultural systems.

Brief reports of research at your experiment station at Iowa State University. This month's report describes better seed analysis method, gully growth prediction equation and soils and livestock studies.

Representative sample of Iowa farmers favors voluntary rather than mandatory supply control programs and votes for efforts to expand demand for farm products and for educational programs on nonfarm employment.