scholarly journals Effect of Sowing Time on Dry Matter Production and Seed Production of Soybean.

1991 ◽  
Vol 60 (4) ◽  
pp. 484-489 ◽  
Author(s):  
Koh-ichiro ASANUMA ◽  
Michio OKUMURA
2011 ◽  
Vol 80 (3) ◽  
pp. 326-332 ◽  
Author(s):  
Kiyoshi Nagasuga ◽  
Shunsuke Uchida ◽  
Hideyuki Kaji ◽  
Yuki Hayakawa ◽  
Sumiyo Nose ◽  
...  

1982 ◽  
Vol 22 (115) ◽  
pp. 76 ◽  
Author(s):  
KA Boundy ◽  
TG Reeves ◽  
HD Brooke

The effect of serial planting on dry matter production, leaf area, grain yield and yield components cf Lupinus angustifoiius (cvv. Uniwhite, Uniharvest and Unicrop) and L. albus (cv. Ultra) was investigated in field plots at Rutherglen in 1973 and 1974. Delayed planting reduced dry matter production of all cultivars, and leaf area for Ultra. Differences in dry matter partitioning were observed between the late flowering Uniharvest, and the early flowering Unicrop and Ultra. In Uniharvest, delayed plantings resulted in a greater proportion of total dry matter being produced during the flowering phase, whereas the reverse was true for Unicrop and Ultra. The later flowering cultivars showed marked grain yield and yield component reduction with later sowing. Yields were reduced by 160.6 kg/ha and 222.5 kg/ha for each week's delay in sowing Uniharvest and Uniwhite, respectively. This effect was offset in the early flowering cultivars by greater development of lateral branches. In addition, when Unicrop and Ultra were planted in April, pod and flower abortion on the main stem resulted from low temperatures at flowering time. Optimum sowing time was early April for Uniwhite and Uniharvest, and early May for Unicrop and Ultra. Excellent vegetative growth under ideal moisture conditions highlighted the poor harvest indices of lupins and the scope for genetic improvement in the genus.


1989 ◽  
Vol 40 (4) ◽  
pp. 833
Author(s):  
JD McFarlane

Seven rates of copper were applied to the soil prior to the sowing of strawberry clover (Trifolium fragiferumL. cv. Palestine) on an alkaline peat deficient in copper. Symptoms of copper deficiency were evident only on the untreated plots where the clover did not set seed nor persist into the second year.Over five years� production, 1.0 kg Cu/ha continued to provide adequate copper, with regular dressings of superphosphate, for maximum dry matter production and seed yield. It was found that seed yield was more sensitive than vegetative dry matter yield to sub-optimal copper supply. At the lowest rate of applied copper (0.125 kg/ha), the vegetative yield ranged from 53% to 80% of the maximum harvest yield, whereas the seed yield ranged from 15% to 50% of maximum yield.For tissue sampled in the spring, the proposed critical range for copper concentration in the youngest open leaf (YOL) for vegetative dry matter production is 3-35 mg Cu/kg whereas that for seed production is 4.5-5.5 mg Cu/kg. At other times of the year the critical concentrations were higher. It was not clear if this was due to environmental conditions or changing internal requirements for copper.The critical copper concentration range in whole top (WT) tissue of 3.0-4.0 mg/kg for vegetative dry matter production could be applied to all samplings. For seed yield the critical range for copper concentration in WT was 4.0-5.0 mg/kg for the spring harvests. The critical copper concentration in seed for seed production was 5.0-6.0 mg/kg. In the pasture situation a critical concentration of 5.0-6.0 mg Cu/kg in the WT should be adopted when the animal requirement is considered.


1993 ◽  
Vol 44 (1) ◽  
pp. 79 ◽  
Author(s):  
GM Lodge ◽  
AJ Schipp

Seven accessions of Danthonia richardsonii Cashmore and three plants of Danthonia linkii Kunth, selected for high inflorescence seed yield were further assessed in a comparative field experiment at Tamworth, N.S.W. The agronomic and morphological variation of these lines, three unselected native ecotypes and D. richardsonii cv. Hume also were examined as part of the process of identifying lines that met the criteria for registration in the schemes operated by the Registrar of Plant Variety Rights and the Registrar of Australian Herbage Plant Cultivars. Thirty plants of each line were planted in spaced nursery rows (1x1 m) on a black earth soil in July 1990 and agronomic and morphological characters were assessed in 1990-92. From these data the D. richardsonii accession T487 and D. linkii T28 were chosen to be registered as D. richardsonii cv. Taranna and D. linkii cv. Bunderra. cv. Taranna had higher (P < 0.05) seed production than all other D. richardsonii accessions, except T489. It was distinguishable from the latter accession by its significantly wider inflorescence. Compared with cv. Hume, the only other known cultivar of D. richardsonii, cv. Taranna had higher dry matter production in spring (P < 0.05), higher seed production, flowered earlier and had a shorter and wider inflorescence (P < 0.05) with a wider glume. It also differed from cv. Hume in having longer and wider (P < 0.05) flag and third tiller-leaves. There are no known cultivars of D. linkii. Compared with the accessions it was tested against, cv. Bunderra had significantly higher seed yields and dry matter production. It was also distinct from those accessions in having a higher number of reproductive tillers, a larger basal area and longer and wider flag and third tiller-leaves (P < 0.05).


2005 ◽  
Vol 33 (1) ◽  
pp. 377-380
Author(s):  
Erzsébet Nádasy ◽  
Gábor Wágner

2013 ◽  
Vol 38 (10) ◽  
pp. 1884-1890 ◽  
Author(s):  
Ren-He ZHANG ◽  
Dong-Wei GUO ◽  
Xing-Hua ZHANG ◽  
Hai-Dong LU ◽  
Jian-Chao LIU ◽  
...  

2011 ◽  
Vol 37 (8) ◽  
pp. 1432-1440
Author(s):  
Cheng-Yan ZHENG ◽  
Shi-Ming CUI ◽  
Dong WANG ◽  
Zhen-Wen YU ◽  
Yong-Li ZHANG ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document