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Plant hardiness zone map
Experiments in the disposal of irrigated crops through the use of hogs
Forest management of loblolly pine in Delaware, Maryland, and Virginia
Lessons on pork production for elementary rural schools
The relation of land tenure to the use of the arid grazing lands of the southwestern states
Second annual report of bird counts in the United States, with discussion of results
A brachytic variation in maize
Relation of soil conditions and orchard management to the rosette of pecan trees
Dusting cotton from airplanes
The chicken mite : its life history and habits
