Sorghum-Legume Intercropping and the Effects of Nitrogen Fertilization. II. Residual Effect on Wheat

1984 ◽  
Vol 20 (3) ◽  
pp. 261-265 ◽  
Author(s):  
A. B. Waghmaref ◽  
S. P. Singh
Keyword(s):  
Nitrogen Fertilization ◽  
Wheat Yield ◽  
Residual Effect ◽  
Fertilizer Nitrogen ◽  
Nitrogen Requirement ◽  
Previous Season ◽  
Different Levels

SUMMARYWheat yield was increased significantly when grown after sorghum intercropped with cowpeas (both for fodder and grain) or with groundnut compared with sole sorghum in the previous season. The nitrogen requirement for the target wheat yield of 4.0 t ha−1 was 108 kg ha−1 after sole sorghum and this was reduced by 87, 61, 83 and 38 kg ha−1 after intercrops of sorghum with fodder and grain cowpeas, groundnut and greengram, respectively. The different levels of nitrogen applied to the sorghum-legume intercropping systems also allowed savings of between 18 and 55 kg ha−1 of fertilizer nitrogen on wheat in the following season.

scholarly journals The Effect of Different Levels of Nitrogen, Phosphorous and Potassium in Some Growth Properties of Rosa Damascena Mill L.

2021 ◽  
Vol 910 (1) ◽  
pp. 012017
Author(s):  
Razzaq Owayez Eedan ◽  
Sabah Ga. Sh. Bajlan ◽  
Sabbar Rahi Jasim Aljeboory
Keyword(s):  
Nitrogen Fertilization ◽  
Phosphorus Concentration ◽  
Rosa Damascena ◽  
Nitrogen And Phosphorus ◽  
College Of Agriculture ◽  
Fertilizer Nitrogen ◽  
Growth Properties ◽  
Number Of Leaves ◽  
Single Effect ◽  
Different Levels

Abstract The experiment was conducted on cuttings of Rosa damascena mill L. During the period from mid-March of 2014 until the end of 2015 before the period of formation of flowers for picking at the College of Agriculture/University of Karbala According to the design of complete random sectors, The research included a global experiment with three different factors of the first chemical fertilizer nitrogen fertilization and three levels (0, 0.5 and 1 gm N. Kg -1 soil) and fertilization with the element phosphorus with three levels (0, 15 and 30 mg P2O5. Kg -1 soil) and three levels of Potassium (0, 100 and 200 mg K2O. Kg -1 soil). The results showed that the single effect of the fertilization treatment with nitrogen, phosphorous, and potassium resulted in a significant increase in the characteristic of plant height and number of leaves, and the fertilization treatment with nitrogen and phosphorus component separately resulted in the production of seedlings that were characterized by a high dry green weight compared to the comparison treatment. The data of the bilateral overlap between nitrogen and phosphorous indicate the presence of significant differences, as the treatment with nitrogen component gave a concentration of (0.5 and 1 g. Kg-1) overlapping with the component of phosphorus concentration (30 mg. Kg-1) with the highest significant rate of (39.66 cm). The treatment of the triple interference between nitrogen, phosphorous, and potassium gave a significant effect on all the studied traits.

scholarly journals Interactions Between Herbicide Application and Timing of Nitrogen Fertilization in Maize Hybrids

2019 ◽  
Vol 11 (9) ◽  
pp. 21
Author(s):  
Guilherme V. Pimentel ◽  
Silvino G. Moreira ◽  
Mateus O. T. de Avila ◽  
Antonio Henrique F. de Carvalho ◽  
Alessandro A. P. da Silva ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
No Reduction ◽  
Block Design ◽  
Climatic Conditions ◽  
Limited Information ◽  
Herbicide Application ◽  
Maize Hybrids ◽  
Growing Seasons ◽  
Randomized Block Design ◽  
Different Levels

Maize hybrids have different levels of tolerance to the herbicide nicosulfuron, depending on the dose, the environment, the phenological stage of the plant and the timing of nitrogen fertilization, and phytotoxic effects can occur without proper management. There is also limited information on the selectivity of current genetically modified hybrids for other recommended herbicides, such as tembotrione. Thus, the objective of this study was to evaluate the effects of herbicides (tembotrione and nicosulfuron) and the timing of nitrogen fertilization on the yield of maize hybrids. The experimental design was a randomized block design, in a 4 × 2 factorial arrangement, with 4 replicates. The treatments consisted of four treatments [weeding; nicosulfuron + atrazine (20 and 32 + 1250 g ha-1 ai) and tembotrione + atrazine (75.6 + 1250 g ha-1 ai)] and two nitrogen fertilization times (0 and 7 days after application). Maize hybrids P30F53 Leptra, DKB 230PRO3 and KWS 9004PRO2 were assessed in two growing seasons (1st and 2nd harvest) during the 2016/2017 growing season. The percentages of weed control; phytotoxicity at 7, 14 and 21 days after application (DAA); plant height; number of rows per ear; and yield at harvest were evaluated. All herbicides were more effective in controlling weeds at the 1st harvest because of favourable climatic conditions. Nitrogen fertilization can be carried out on the same day as the application of the herbicides nicosulfuron and tembotrione with no reduction in yield for the hybrids P30F53 Leptra, DKB 230PRO3 and KWS 9004PRO2.

scholarly journals Root and shoot responses of upland New Rice for Africa varieties to fluctuating soil moisture conditions as affected by different levels of nitrogen fertilization

2020 ◽  
Vol 206 (3) ◽  
pp. 322-337
Author(s):  
Daniel Makori Menge ◽  
Mana Kano‐Nakata ◽  
Akira Yamauchi ◽  
Roel Rodriguez Suralta ◽  
Daigo Makihara
Keyword(s):  
Soil Moisture ◽  
Nitrogen Fertilization ◽  
Moisture Conditions ◽  
Different Levels

scholarly journals Residual effect of a few herbicides on chlorophyll content and primary productivity of succeeding crops and associated weeds

2013 ◽  
Vol 35 (1) ◽  
pp. 133-143 ◽  
Author(s):  
A. N. Rao
Keyword(s):  
Zea Mays ◽  
Chlorophyll Content ◽  
Primary Productivity ◽  
Cajanus Cajan ◽  
Residual Effect ◽  
The Other ◽  
Pigment Concentration ◽  
Considerable Decrease ◽  
Previous Season ◽  
Residual Plots

The residual effect of a few herbicides viz: Atrataf (atrazine), 2,4-D and Aresin (monolinuron) sprayed in the previous season on the pigment concentration and primary productivity of the crops (viz: <i>Zea mays</i> and <i>Cajanus cajan</i>) grown in rotation, as well as their associated weeds has been studied. The results indicate that the residues of all the three herbicides were non toxic to <i>Zea mays</i> and toxic to <i>Cajanus cajan</i> as an increase in chlorophyll content and primary productivity occurred in the former, whereas the contrary is true for the latter. Weeds from residual plots have shown a considerable decrease in the chlorophyll content and primary productivity. The most susceptible weed to all the three herbicides was <i>Acalypha malabarica</i>, while <i>Echinochloa colonum</i> is susceptible to the residues of Atrazine but is tolerant to the residues of the other two herbicides. Recommendations based on the observations are presented in the paper.

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