2024-03-28T23:11:51Z
https://assjm.journals.ekb.eg/?_action=export&rf=summon&issue=8551
Annals of Agricultural Science, Moshtohor
1110-0419
1110-0419
2017
55
1
Effect of some weed control treatments and plant density on two soybean varieties and associated weeds
asmaa
Hamoda
Two field experiments were carried out at the Research and Experimental Station of the Faculty of Agriculture, Moshtohr, Benha University, Kalubia Governorate during the two summer seasons of 2014 and 2015 to study effect of some weed control treatments and plant densities on two soybean varieties productively and associated weeds. Results of the combined analyses of the two seasons showed that: Pods and seed weights/plant (g), seed, straw and biological yields kg/fad were significantly increased by hand hoeing twice after 15 and 45 days from planting compared with Stomp and Amex.Giza111 soybean variety surpassed Giza 21 in growth characters namely (plant height, dry weight of leaves, stems and plant, while Giza 21 gave the highest value of dry weight of pods. Regarding yield and yield component, Giza 111 recorded the highest value of plant height, straw yield and biological yield, while Giza 21 gave the highest weight of seeds/plant and seed yield/ fad. With regard to plant density Decreasing plant density to 116667plants/fad increased weight of pods and seeds/plant, while the highest plant density (175000 plants/fad) led to increasing the straw and biological yield/ fad. Whereas the plant density 140000 plant/fad recorded the highest values of plant height and seed yield/fad. The interaction between Giza111, plant density of 140000 plants/fad and hand hoeing twice recorded minimum value of dry weight of total weeds at 75 days after planting.
Glycine max
density
hoeing
Growth
chemical control
Stomp
Amex
2017
03
01
1
10
https://assjm.journals.ekb.eg/article_56191_3b681cb816e9f37345991a96d5895185.pdf
Annals of Agricultural Science, Moshtohor
1110-0419
1110-0419
2017
55
1
Effect of nitrogen rates and seedling age on the productivity of some promising hybrid rice combinations
Hassan
Hamad
This experiment was conducted at Experimental Farm of Rice Research Department at Sakha Agriculture Research Station, Sakha, Kafr EL Sheikh, Egypt during 2014 and 2015 rice growing seasons to study the effect of seedling ages and nitrogen rates on the productivity of two Egyptian hybrids combinations, Egyptian hybrid 1 and new hybrid combination SK2151 H on different characters. A split split-plot design with three replications was used. The main plot was devoted to hybrid rice combinations, while the seedling age were arranged in the sub plots and nitrogen rates were assigned in the sub–sub plots with three replications. Four rates of nitrogen (zero, 55, 110 and 165 kg N/ha) and three seedling ages (20, 25 and 30 days), were used, The date of sowing was at 1st May of each season. The data were recorded on plant height (cm), panicles hill-1, panicle weight (g), panicle length (cm), grain yield (tha-1), 1000-grain weight (g), harvest index (%) and spikelet fertility %. Results showed that, the high rate of nitrogen significantly influenced on plant height (cm),panicles hill-1, panicle weight(g), panicle length (cm), grain yield (tha-1), 1000-grain weight (g), harvest index (%) and spikelet fertility (%), The highest grain yield (13.600 tha-1) resulted from 20 days seedling age and 165 kg nitrogen per hectare for the Egyptian hybrid 1 in the second season. While, the lowest grain yield (4.230 tha-1) was recorded without application of nitrogen fertilizer (control) with seedling age of 30 days for SK 2151H in the first season.
Hybrid combination
seedling ages
nitrogen rates and grain yield
2017
03
01
11
20
https://assjm.journals.ekb.eg/article_56194_1ec6f9a13629b1aef5f32567bef9ad1a.pdf