- Publication venue
- Iowa State University Digital Repository
- Publication date
- 01/01/1966
- Field of study
- Publication venue
- Publication date
- 01/01/1966
- Field of study
- Publication venue
- 'American Society of Agronomy'
- Publication date
- Field of study
- Publication venue
- 'American Society of Agronomy'
- Publication date
- Field of study
- Publication venue
- 'Elsevier BV'
- Publication date
- Field of study