Shatter Loss in Alfalfa Seed Harvesting

1980 ◽  
Vol 23 (1) ◽  
pp. 0043-0046
Author(s):  
Ramesh Kumar ◽  
John R. Goss ◽  
Bob Sheesley
Keyword(s):  
Author(s):  
Eduardo Daniel Bolaños-Aguilar ◽  
Christian Huyghe ◽  
Javier Francisco Enríquez-Quiroz

Objective: To describe the sequential pattern of reproductive development of Medicago sativa L. (flowering dynamic) using the relation between principal floral stem nodes and accumulated growing degree day (GDD) in different environmental conditions, and to determine the use of this relationship as a predictor of the seed harvesting date. Design/Methodology/Approach: It was carried out in random blocks and factorial arrangement of 2?5, with two repetitions. Each repetition was made up of 30 plants. Results: The flowering dynamic followed the same pattern between varieties, with a linear relation between GDD and number of floral nodes. The year A0 was different from the years A1 and A2. Therefore, A1 with cutting, and A2 with and without cutting presented less GDD during the flowering stage. In contrast, A0 showed more GDD during this period. In the different environmental conditions, the linear curves of flowering dynamic turned erratic after the tenth floral node (300 GDD) due to a low rate of plants with more than 10 floral nodes along the principal stem. Study Limitations/Implications: It is necessary to have a meteorological station near the alfalfa seed production site, in order to specify the GDD required for predicting the correct moment to harvest seeds. Findings/Conclusions: The reproductive development of M. sativa presents a linear relation between the number of floral nodes and GDD, which allows the prediction of the optimal seed harvesting date, in any environmental condition present.


2011 ◽  
Vol 19 (3) ◽  
pp. 655-660 ◽  
Author(s):  
Ping-Hui HUO ◽  
Shang-Li SHI ◽  
Jian-Feng LI ◽  
Shu-Qing ZHANG

jpa ◽  
1992 ◽  
Vol 5 (4) ◽  
pp. 512-518 ◽  
Author(s):  
Dennis Wichelns ◽  
Thomas F. Weaver ◽  
Priscilla M. Brooks
Keyword(s):  

Crop Science ◽  
1973 ◽  
Vol 13 (1) ◽  
pp. 72 ◽  
Author(s):  
M. W. Pedersen ◽  
D. K. Barnes
Keyword(s):  

Crop Science ◽  
1980 ◽  
Vol 20 (3) ◽  
pp. 405-407 ◽  
Author(s):  
D. E. Brown ◽  
W. R. Kehr ◽  
G. R. Manglitz ◽  
J. H. Elgin ◽  
S. A. Ostazeski
Keyword(s):  

1996 ◽  
Vol 31 (4) ◽  
pp. 518-518
Author(s):  
A. I. Rezvukin ◽  
I. Yu Berezovikova ◽  
I. Ya Shalaurova ◽  
Yu. P. Nikitin

1992 ◽  
Vol 38 (6) ◽  
pp. 520-525 ◽  
Author(s):  
J. W. Kosanke ◽  
R. M. Osburn ◽  
G. I. Shuppe ◽  
R. S. Smith

Slow rehydration of bacteria from dried inoculant formulations provided higher viable counts than did rapid rehydration. Estimates were higher when clay and peat powder formulations of Rhizobium meliloti, Rhizobium leguminosarum biovar trifolii, and Pseudomonas putida, with water activities between 0.280 and 0.650, were slowly rehydrated to water activities of approximately 0.992 before continuing the dilution plating sequence. Rhizobium meliloti populations averaged 6.8 × 108 cfu/g and 1328 cfu/alfalfa seed greater when slowly rehydrated from bulk powder and preinoculated seeds, respectively. Bulk powder samples were slowly rehydrated to 0.992 water activity by the gradual addition of diluent, followed by a 10-min period for moisture equilibration. Preinoculated seed samples were placed in an environmental chamber at 24 °C with relative humidity greater than 80% for 1 h to allow moisture absorption. "Upshock," osmotic cellular stresses that occur during rehydration, was reduced when dried microbial formulations were slowly rehydrated and equilibrated before becoming fully hydrated in the dilution plating sequence. These procedures may also be applicable when estimating total viable bacterial populations from dried soil or other dry formulations. Key words: rehydration procedure, microbial rehydration, desiccation, Rhizobium, Pseudomonas.


1947 ◽  
Vol 40 (3) ◽  
pp. 446-448 ◽  
Author(s):  
J. M. Scholl ◽  
J. T. Medler
Keyword(s):  

Sign in / Sign up

Export Citation Format

Share Document