Agrobiological Foundations of the Productivity of Sweet Clover

Keyword(s):  
1943 ◽  
Vol 151 (2) ◽  
pp. 477-485
Author(s):  
William R. Sullivan ◽  
Edward O. Gangstad ◽  
Karl Paul Link
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1943 ◽  
Vol 35 (6) ◽  
pp. 540-541
Author(s):  
C. B. Richey ◽  
C. J. Willard
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1958 ◽  
Vol 36 (3) ◽  
pp. 411-420 ◽  
Author(s):  
H. Baenziger ◽  
J. E. R. Greenshields

In crosses involving derivatives of interspecific crosses of (Melilotus alba × Melilotus dentata) and (M. officinalis × M. alba) with pure Melilotus alba, irregular ratios were shown to be common. Previous studies using pure M. alba have indicated simple Mendelian inheritances for many of the characters studied herein. However, when interspecific derivatives are involved, some plants give F2 families that do not fit any Mendelian ratio. Data are presented indicating that in segregations where the deficiency occurs it is always in the genotype that has contributed the gene from the non-recurrent species. Investigations carried out in this study are designed to determine possible causes for these "blurred" ratios.


1986 ◽  
Vol 66 (2) ◽  
pp. 273-285 ◽  
Author(s):  
J. F. DORMAAR ◽  
C. W. LINDWALL ◽  
G. C. KOZUB

A field was artificially eroded by levelling in 1957 and then continuously cropped to barley for 7 yr. Subsequently, a wheat-fallow experiment was conducted from 1965 to 1979 to determine the effects of four fertilizer treatments and green manure (yellow sweet clover) on restoring the productivity to soil that had been "eroded" to various depths. After 22 yr and 14 crops, the productivity of the land from which soil was removed has been improved but not fully restored. Although green manuring with yellow sweet clover improved soil structure, wheat yields were not improved because of competition for soil moisture and poorer in-crop weed control in this part of the rotation. The addition of 45 kg N plus 90 kg P2O5 per hectare in each crop year to sites from which 8–10, 10–20, or 46 + cm of soil had been removed resulted in yield increases of 18, 46, and 70%, respectively, over the unfertilized check of each treatment; the average yields were 104, 91, and 70%, respectively, of the undisturbed, unfertilized (check) treatment. On "erosion" treatments where only 8–10 cm of soil were removed, 45 kg N plus 22 kg P2O5 per hectare were sufficient to restore the productivity. Precipitation apparently had a greater effect than fertilizer application on wheat yields. The loss of organic matter and associated soil structure characteristics seemed to be critical factors contributing to yield losses associated with soil erosion. These results show that it is more practical to use management practices that prevent soil erosion than to adopt the practices required to restore eroded soil. Key words: Soil erosion, topsoil loss, water-stable aggregates, soil organic matter, green manure, precipitation


1943 ◽  
Vol 147 (2) ◽  
pp. 463-474
Author(s):  
Karl Paul Link ◽  
Ralph S. Overman ◽  
William R. Sullivan ◽  
Charles Ferdinand Huebner ◽  
Lester D. Scheel
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1993 ◽  
Vol 28 (2) ◽  
pp. 113-124 ◽  
Author(s):  
Z. Ge ◽  
C. Hiruki ◽  
K.L. Roy

1930 ◽  
Vol 13 (6) ◽  
pp. 424-431 ◽  
Author(s):  
C.Y. Cannon ◽  
Delbert Greenwood
Keyword(s):  

1952 ◽  
Vol 45 (2) ◽  
pp. 316-319 ◽  
Author(s):  
J. C. Herron
Keyword(s):  

1967 ◽  
Vol 99 (11) ◽  
pp. 1229-1229 ◽  
Author(s):  
P. G. Pilley ◽  
R. A. Trieselmann

The first record of the occurrence in North America of the white-tipped clover case-moth, Coleophora frischella L., was made in June 1966 when a single adult was taken by Heinemann on Picton Island, N.Y., in the St. Lawrence River (Freeman, personal communication). Independently, Trieselmann collected the larvae from white sweet-clover, Melilotus alba Desr., on 28 July through to 8 August 1966 at many points around Pembroke, Ont. Detailed examinations made at two of the collection points indicated that between 15 and 20% of sweetclover seeds were damaged. Because of its potential economic significance, the authors wish to make the presence of this species known to agricultural entomologists in Canada and the United States.


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