scholarly journals RESPONSE OF MAIZE GROWTH AND YIELD TO SOWING METHODS, MECHANICAL WEED CONTROL AND NITROGEN FERTILIZER LEVELS

2008 ◽  
Vol 33 (11) ◽  
pp. 7771-7782
Author(s):  
A. Attia ◽  
S. EL-Moursy ◽  
E. Said ◽  
A. El-Azab
Keyword(s):  
Weed Control ◽  
Nitrogen Fertilizer ◽  
Growth And Yield ◽  
Maize Growth ◽  
Mechanical Weed Control

scholarly journals SENSITIVITY OF SWEET POTATO GENOTYPES TO CLOMAZONE AND WEED INTERFERENCE

2018 ◽  
Vol 31 (2) ◽  
pp. 352-359 ◽  
Author(s):  
EDSON APARECIDO DOS SANTOS ◽  
VALTER CARVALHO DE ANDRADE JÚNIOR ◽  
DANIEL JOSÉ SILVA VIANA ◽  
ALBERTIR APARECIDO DOS SANTOS ◽  
ANTÔNIO JULIO MEDINA DA SILVA ◽  
...  
Keyword(s):  
Experimental Design ◽  
Weed Control ◽  
Sweet Potato ◽  
Branch Length ◽  
Growth And Yield ◽  
Control Methods ◽  
Root Yield ◽  
Weed Interference ◽  
Four Blocks ◽  
Mechanical Weed Control

ABSTRACT Sweet potato is a promising crop in Brazil due to its potential for bioenergy production. However, little information on adequate chemical weed control is found for this crop. Thus, the objective of this work was to evaluate the effect of clomazone on 20 genotypes of sweet potato and the sensitivity of these materials to weed interference. A field experiment was conducted using an experimental design with four blocks arranged in split-plots. The sweet potato genotypes Brazlândia-Branca, Cariru-Vermelha, Princesa, Tomba-Carro-1 and UFVJM (01, 05, 06, 07, 08, 10, 14, 23, 26, 30, 35, 42, 43, 46, 48 and 49) were grown for 180 days under three weed managements (soils treated with clomazone, mechanically weeded and with no weed control). The plots consisted of the weed control methods and the subplots consisted of the sweet potato genotypes. Phytotoxicity, branch growth and yield were evaluated. Plants grown with no weed interference had larger branch length. The highest yields were found in clomazone-treated soils. Weed interference reduced 81 to 99.7% of the yield. The less susceptible genotypes to weed interference were UFVJM07, UFVJM10 and UFVJM35, and the most sensitive were Princesa and UFVJM01. The root yield of plants under chemical weed control was similar to or greater than those with mechanical weed control in 17 of the 20 genotypes evaluated.

Effect of Nitrogen Fertilizer and Spraying with Iron Growth and Yield for Corn Zea mays L.

2015 ◽  
Vol 28 (2) ◽  
pp. 56-66
Author(s):  
Kifah A. J. Al-Dogachi ◽  
Kadim K. Al-Asady ◽  
Manal A. Askar
Keyword(s):  
Zea Mays ◽  
Nitrogen Fertilizer ◽  
Zea Mays L ◽  
Growth And Yield

Maize Growth and Yield Following Late Summer Hail

Crop Science ◽  
1994 ◽  
Vol 34 (5) ◽  
pp. 1400-1403 ◽  
Author(s):  
L. M. Dwyer ◽  
D. W. Stewart ◽  
L. Evenson ◽  
B. L. Ma
Keyword(s):  
Late Summer ◽  
Growth And Yield ◽  
Maize Growth

scholarly journals Economic and Horticultural Evaluation of Chemical and Mechanical Weed Control Strategies for Cowpea

1992 ◽  
Vol 117 (2) ◽  
pp. 255-259
Author(s):  
Brian A. Kahn ◽  
Raymond Joe Schatzer
Keyword(s):  
Weed Control ◽  
Seed Yield ◽  
Control Strategies ◽  
Dry Weight ◽  
Farm Income ◽  
Control Chemical ◽  
Biological Yield ◽  
Cowpea Seed ◽  
Main Effects ◽  
Mechanical Weed Control

The herbicides paraquat, trifluralin, and metolachlor were compared for efficacy of weed control in cowpea [Vigna unguiculata (L.) Walp.] with and without cultivation as a supplemental strategy. Herbicides also were compared against a no cultivation-no herbicide treatment (control) and against cultivation without an herbicide. Cultivation had no significant effect on seed yield, biological yield, or harvest index of cowpea. Paraquat, applied before seeding but after emergence of weeds, was ineffective for weed control and usually did not change cowpea yield from that obtained without an herbicide. Trifluralin and metolachlor more than tripled cowpea seed yield compared with that obtained without an herbicide in 1988, when potential weed pressure was 886 g·m-2 (dry weight). The main effects of trifluralin and metolachlor were not significant for cowpea seed yield in 1989, when potential weed pressure was 319 g·m-2 (dry weight). However, in 1989, these two herbicides still increased cowpea seed yield compared with that of the control and increased net farm income by more than $300/ha compared with the income obtained from the control. Chemical names used 1,1'-dimethyl-4,4' -bipyridlnium salts (paraquat); 2,6-dinitro-N,N-dipropyl-4-(trifluoromethyl) benzenamine (trifluralin); 2-chloro-N-(2-ethyl-6 -methylphenyl)-N-(2-methoxy-l-methylethyl) acetamide (metolachlor).

scholarly journals Growth and Yield of Lettuce (Lactuca Sativa L.) Influenced As Nitrogen Fertilizer and Plant Spacing

2017 ◽  
Vol 10 (06) ◽  
pp. 62-71 ◽  
Author(s):  
M. R. Hasan ◽  
A.K.M.M. Tahsin ◽  
M. N. Islam ◽  
M. A. Ali ◽  
J. Uddain
Keyword(s):  
Lactuca Sativa ◽  
Nitrogen Fertilizer ◽  
Growth And Yield ◽  
Plant Spacing ◽  
Lactuca Sativa L
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