Search National Agricultural Library Digital Collections
Displaying
all 4 items
start over
- Author:
- Weir, Wilbert Walter, 1882 , USDA
- Subject:
- crop rotation , fertilizers , yields , crop yield , crop production , soil productivity , long term experiments , research methods , land management , soil management , Crop rotation. , Soil productivity.
- Physical description:
- 68 p.
- Collection:
- Organic Roots Collection
- Series:
- Bulletin of the U.S. Department of Agriculture.
- Part Of:
- Bulletin of the U.S. Department of Agriculture.
- Author:
- Keating, F. E. (Fred Earl), 1892 , USDA
- Subject:
- climatic factors , field experimentation , crop rotation , tillage , small grains , grain crops , Cropping systems -- Texas. , Tillage -- Texas. , Field experiments -- Texas.
- Physical description:
- 32 p.
- Collection:
- Organic Roots Collection
- Series:
- Circular
- Part Of:
- Circular
- Author:
- Bennett, Hugh H. (Hugh Hammond), 1881-1960. , USDA
- Subject:
- erosion control , soil erosion , splash erosion , stream erosion , water erosion , vegetation cover , cover crops , runoff , conservation practices , contour farming , strip tillage , strip cropping , conservation tillage , soil conservation , terracing , terraces , crop rotation , vegetated waterways , dams (hydrology) , floods , Soil conservation -- United States. , Flood control -- United States.
- Physical description:
- 16 p.
- Collection:
- Organic Roots Collection
- Series:
- Miscellaneous publication
- Part Of:
- Miscellaneous publication
- Author:
- Coville, Frederick V. (Frederick Vernon), 1867-1937. , USDA
- Subject:
- soil chemistry , soil suitability , soil properties , soil classification , acid soils , acid tolerance , pasture plants , small fruits , vegetables , legumes , forage legumes , cover crops , crop rotation , forage , Crop rotation -- United States. , Acid soils -- United States.
- Physical description:
- 13 p.
- Collection:
- Organic Roots Collection
- Series:
- Bulletin of the U.S. Department of Agriculture.
- Part Of:
- Bulletin of the U.S. Department of Agriculture.
