Tillage has been known to cause soil erosion and cost time and resources and this affects
productivity and inflates the cost of production. Therefore, over the past few years in many …

In the past few years, there has been a growing trend towards reducing tillage in crop**
systems to allow stubble retention, earlier planting and improved soil structure. However, the …

A growing awareness of environmental issues in Canada has had a major influence on
government policies. An initiative was launched by the government of Ontario to promote …

The vast majority of crop hectares in the United States are treated with chemical herbicides
annually. The adoption of herbicides for weed control was rapid in the 1950s and 1960s …

Soils from long-term tillage plots at three locations in Ohio were sampled to determine
composition and size of weed seed banks following 25 yr of continuous no-tillage, minimum …

In a 6-yr study on four farms (36 fields) in Ontario, Canada, we tested the effects of tillage
(moldboard, chisel plow, no tillage) and crop rotations (continuous corn, corn-soybean, corn …

A simple model is developed in which the density of weed seedlings emerging in a field is
related to (1) the ability of seedlings to emerge from various depths in the soil,(2) the survival …

This chapter presents discussion based on crop management research results reported
since the soybean monograph chapters by Johnson and Van Doren and Reicosky. It …

Management of perennial weeds is a major concern in reduced-tillage crop** systems.
Field research was conducted at Nashua, IA, from 1977 through 1990 to evaluate the long …

The awareness and adoption of conservation tillage is one of the most important changes
taking place in agriculture today. There are, however, concerns regarding weed species …