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- Author:
- Jorgenson, L.; Brewbaker, H.E.
- Source:
- Agronomy journal 1927 v.19 no.9 pp. 819-830
- ISSN:
- 0002-1962
- Subject:
- crossing; Zea mays; inbred lines; self-pollination
- Abstract:
- ... An investigation has been made of 10 selfed lines of maize within a variety and the F1 hybrids between them. These lines had been selfed from three to four generations but appeared to be relatively homozygous on the basis of a comparison of the selfed and sib-pollinated lines. 2. Both high and low yielders were obtained among the hybrids of each of the selfed lines, but some are distinctly superio ...
- DOI:
- 10.2134/agronj1927.00021962001900090006x
-
http://dx.doi.org/10.2134/agronj1927.00021962001900090006x
- Author:
- Jones, J.W.
- Source:
- Agronomy journal 1927 v.19 no.9 pp. 830-839
- ISSN:
- 0002-1962
- Subject:
- crossing; Oryza sativa; variety trials; inheritance (genetics); California
- Abstract:
- ... 1. The crosses Butte X Colusa and Colusa X Italian Red were used in the study of the inheritance of awnedness reported in this paper. Butte is a fully awned variety, while Italian Red is partly awned, and Colusa is a variety awnless under all conditions. 2. Awnedness is partially dominant to awnlessness in F1 and the F2 of the Butte X Colusa cross segregated in the phenotypic ratio of nine awned t ...
- DOI:
- 10.2134/agronj1927.00021962001900090007x
-
http://dx.doi.org/10.2134/agronj1927.00021962001900090007x
- Author:
- Hartwell, B.L.; Damon, S.C.
- Source:
- Agronomy journal 1927 v.19 no.9 pp. 843-849
- ISSN:
- 0002-1962
- Subject:
- ammonium sulfate; phosphoric acid; liming; potassium fertilizers; crop yield; nitrates
- Abstract:
- ... This paper contains the results for 1915 to 1926 of a field comparison, conducted since 1893, of equal amounts of nitrogen in sulfate of ammonia and nitrate of soda accompanied by liberal amounts of phosphorus and potassium. Prior to 1915, each source of nitrogen had been accompanied by an equal amount of lime, and also had been used without lime. Subsequently, extra lime was applied to the more-l ...
- DOI:
- 10.2134/agronj1927.00021962001900090009x
-
http://dx.doi.org/10.2134/agronj1927.00021962001900090009x
- Author:
- Bouyoucos, G.J.
- Source:
- Agronomy journal 1927 v.19 no.9 pp. 788-797
- ISSN:
- 0002-1962
- Subject:
- salts; acids; soil structure; soil texture; soil formation
- Abstract:
- ... Blocks of dry soils, or soils made into balls and dried, tend to disintegrate or slake into their ultimate single particles or into compound particles or to crumble into small pieces when placed in an excess of water. An attempt was made to investigate the influence of different reagents of various concentrations upon the rate and character of slaking of soils of different types. The reagents empl ...
- DOI:
- 10.2134/agronj1927.00021962001900090003x
-
http://dx.doi.org/10.2134/agronj1927.00021962001900090003x
- Author:
- Laude, H.H.; Stansel, R.H.
- Source:
- Agronomy journal 1927 v.19 no.9 pp. 781-787
- ISSN:
- 0002-1962
- Subject:
- Oryza sativa; variety trials; inflorescences; duration; Texas
- Abstract:
- ... In a study of the inflorescence of rice grown on Substation No. 4 of the Texas Agricultural Experiment Station observations were made on 45 panicles, including 7,902 florets and representing six varieties or selections. No blooming occurred before 8:00 a.m. and none after 4:00 p.m. The maximum number bloomed between 11:00 a.m. and 12:00 noon. The majority of the rice panicles completed blooming in ...
- DOI:
- 10.2134/agronj1927.00021962001900090002x
-
http://dx.doi.org/10.2134/agronj1927.00021962001900090002x
- Author:
- Wessels, P.H.; Hartwell, B.L.
- Source:
- Agronomy journal 1927 v.19 no.9 pp. 761-780
- ISSN:
- 0002-1962
- Subject:
- Solanum tuberosum; crop yield; nitrogen content; climatic factors
- Abstract:
- ... Especially the later varieties of potatoes grown at the Rhode Island Station are about a fourth less valuable for seed than those grown in northern New England. They progressively deteriorate even in spite of tuber-unit selection. The inferiority of the homegrown seed exhibited itself largely by a considerable admixture of inferior plants presumably affected by one or more of the so-called degener ...
- DOI:
- 10.2134/agronj1927.00021962001900090001x
-
http://dx.doi.org/10.2134/agronj1927.00021962001900090001x