Add to ORKGWeeds have an important bearing on the extent and the character of the crop produced. An examination of any developing crop during the growing season brings the issue to the foreground. In the case of pasture land the efficiency is much reduced by allowing weeds to grow. One of us has found that more than 39 per cent of the pastures of Iowa contain the small ragweed (Ambrosia artemesiifolia) which not only prevents the growth of blue grass but also makes it difficult for cattle to graze. What has been specifically stated for pasture land is as pertinent to other crops in varying degrees
The height to which weeds grow, depends upon geographical location, soil, and particularly precipita...
The drought of the last seven years with its disastrous dust storms has damaged vast areas of the na...
This archival publication may not reflect current scientific knowledge or recommendations. Current i...
Weeds have an important bearing on the extent and the character of the crop produced. An examination...
The term weed is often defined as a plant out of place. A. C. Martin has complained that this defi...
This work on transpiration involved a study of the competition and the comparison of the growth of w...
Extension circular 176 discusses the effects different hayfever weed species have on crop yields in ...
Weeds have become more evident and problematic in grazed pastures as forage and livestock production...
The primary reason for controlling weeds during crop production is to prevent crop yield losses due ...
Iowa and most other states have a real weed problem. Canada thistle, quack grass, horse nettle and f...
Populations of weeds capable of affecting crop yields are present in every field during every year. ...
Weeds in pastures continue to offer challenges to the producer for controlling these unwanted plants...
EXACT knowledge of the relations existing between weeds and cultivated crops is very limited. This i...
Greatly increased interest has been shown recently thruout Iowa in the recognition of weeds which ar...
According to the U.S. Department of Agriculture, countless hours and millions of dollars are spent e...
The height to which weeds grow, depends upon geographical location, soil, and particularly precipita...
The drought of the last seven years with its disastrous dust storms has damaged vast areas of the na...
This archival publication may not reflect current scientific knowledge or recommendations. Current i...
Weeds have an important bearing on the extent and the character of the crop produced. An examination...
The term weed is often defined as a plant out of place. A. C. Martin has complained that this defi...
This work on transpiration involved a study of the competition and the comparison of the growth of w...
Extension circular 176 discusses the effects different hayfever weed species have on crop yields in ...
Weeds have become more evident and problematic in grazed pastures as forage and livestock production...
The primary reason for controlling weeds during crop production is to prevent crop yield losses due ...
Iowa and most other states have a real weed problem. Canada thistle, quack grass, horse nettle and f...
Populations of weeds capable of affecting crop yields are present in every field during every year. ...
Weeds in pastures continue to offer challenges to the producer for controlling these unwanted plants...
EXACT knowledge of the relations existing between weeds and cultivated crops is very limited. This i...
Greatly increased interest has been shown recently thruout Iowa in the recognition of weeds which ar...
According to the U.S. Department of Agriculture, countless hours and millions of dollars are spent e...
The height to which weeds grow, depends upon geographical location, soil, and particularly precipita...
The drought of the last seven years with its disastrous dust storms has damaged vast areas of the na...
This archival publication may not reflect current scientific knowledge or recommendations. Current i...