Man has been engaging in biological and chemical warfare against himself. The result is pollution, a situation that's getting lots of national attention. Here's a specific look at the situation in Iowa.

Foliar diseases were widepsread and quite damaging to trees in Iowa last year. The author discusses a number of these and control methods.

Based on current soil moisture conditions and average weather, there's better than a 50-50 change that soybean yields will be higher in 1970 in most parts of the state. Corn yields are likely to be similar to 1969, except in western Iowa where the yield probably will be lower.

Farm size and efficient management will continue to be major keys to profitablility, says this farm management specialist. High interest rates and short-tern loan repayment schedules may limit some program expansion and mechanization. And the author notes a changing response to favorable feed-livestock relationships.