This publication has been prepared in the interest of a permanent irrigation agriculture. Irrigation has played an important role in the remarkable achievement by farmers in this nation in meeting wartime and postwar production goals. It may play an even greater part in our future agricultural production. The food needs of a growing population and the establishment of desirable trade relations with other nations will require the maintenance of efficient, high-level agricultural production.

The purpose of the present publication is to supply an account of the extent and distribution of the major agricultural land uses and a general analysis of the land use situation in the United States, showing the latest data available for both land in farms and land outside farms. The information on the acreages of land devoted to the chief purposes provides a comprehensive picture of the use of all land in the United States, trends in land use, and elements affecting use.

The aim of the investigation conducted upon a typical representative of a major Canterbury soil type, is to indicate the nature and extent of variation in an apparently uniform field and to determine the frequency of sampling necessary for different soil properties.

Gastrimargus musicus Fabr. is an endemic locust species with a distribution practically throughout coastal and sub-coastal Australia, where the rainfall exceeds 20 inches annually. Swarming occurs in the northern half of the continent and migrations into coastal agricultural and dairying districts occurs periodically. Coastal infestations originate in localized outbreak areas in the sub-coastal districts. In central Queensland, the Clermont-Capella area was apparently the vital source of swarms which eventually caused widespread damage, particularly to pasturage, between 1939 and 1947 from Proserpine to Mt. Larcom. The ultimate aim of control practice would be the accurate mapping of outbreak areas both in central and in northern Queensland with the object of destroying incipient swarms before mass migrations commence.