Author
United States Soil Conservation Service
5,671
United States Department of Agriculture
3,003
SpringerLink (Online service)
959
Sotheby's (Firm)
946
Food and Agriculture Organization of the United Nations
937
United States Forest Service
794
United States Agricultural Research Service
732
United States Natural Resources Conservation Service
592
Texas Agricultural Experiment Station
509
United States Foreign Agricultural Service
396
Philadelphia Society for Promoting Agriculture Collection (University of Pennsylvania)
384
United States Bureau of Chemistry and Soils
372
United States Department of Agriculture. Economic Research Service
338
United States Congress. House. Committee on Agriculture
334
United States Bureau of Soils
330
ebrary, Inc
315
United States Bureau of Agricultural Economics
299
Kansas Agricultural Experiment Station
261
Purdue University Agricultural Experiment Station
216
California Integrated Waste Management Board
209
California Agricultural Experiment Station
207
Oklahoma Agricultural Experiment Station
201
Ohio Agricultural Research and Development Center
195
United States Bureau of Chemistry
186
University of Illinois at Urbana-Champaign Agricultural Experiment Station
179
Arkansas Agricultural Experiment Station
178
Colorado Agricultural Experiment Station
177
Organisation for Economic Co-operation and Development
176
ProQuest (Firm)
172
Kentucky Agricultural Experiment Station
169
United States Bureau of Land Management
168
University of Missouri--Columbia Agricultural Experiment Station
167
University of Nebraska--Lincoln Conservation and Survey Division
164
United States Office of Experiment Stations
160
Ohio Division of Lands and Soil
158
Michigan State University Agricultural Experiment Station
157
Skinner, Inc
157
Cornell University Agricultural Experiment Station
156
Iowa Agriculture and Home Economics Experiment Station
155
Board of Agriculture (Great Britain)
154
Soil Science Society of America
152
University of Georgia College of Agriculture. Experiment Stations
152
University of Minnesota Agricultural Experiment Station
146
U.S. Fish and Wildlife Service
142
United States Agency for International Development
142
United States Bureau of Indian Affairs
135
United States Bureau of Plant Industry
135
South Dakota Agricultural Experiment Station
134
University of Tennessee, Knoxville Agricultural Experiment Station
130
Sotheby's France SA
129
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