EFFECT OF ROW SPACING AND WEED CONTROL METHODS ON GROWTH OF SOME BREAD WHEAT CULTIVARS IN NEWLY CULTIVATED SANDY SOIL

Weed competition has been identified as one of the major obstacles in crop production. The produc-tion of groundnut is limited by high weed infestation resulting in yield losses ranging from 50 - 80% in Nigeria. Hence, the need to evaluate integrated weed control in its production. Field trials were there-fore conducted at the Teaching and Research Farm of the Federal University of Agriculture, Abeokuta (7o 20’ N, 30 23’ E) to evaluate the influence of inter-row spacing and weed control methods on growth and yield of groundnut during the wet seasons in 2009 and 2010. The experiment was a Randomised Complete Design (RCBD) laid out in a split plot with three replications. The main plot treatment con-sisted of three inter-row spacings of 60 cm, 75 cm and 90 cm while the subplots included five weed control treatments of commercial formulation of metolachlor plus promethyne mixture (codal) at 1.0 kg a.i/ha, codal at 1.0 kg a.i./ha followed by supplementary hoe weeding at 6 weeks after sowing (WAS), codal at 2 kg a.i./ha, hoe weeding at 3, 6 and 9 WAS and a weedy check. Inter-row spacings of 60 cm and 75 cm reduced weed growth with consequent higher yields compared to the inter-row spacings of 90 cm in the early season of 2009. Application of codal at 1.0 kg a.i./ha followed by supplementary hoe weeding at 6 WAS combined with 60cm inter-row spacing gave effective weed control and higher groundnut pod yield than hoe-weeded control in both years of experimentation.

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Milk thistle (Silybum marianum L. Gaertn.) achene yield had a positive response to nitrogen fertilization, row spacing, sowing date, and weed control methods

Industrial Crops and Products ◽

10.1016/j.indcrop.2020.113104 ◽

2020 ◽

pp. 113104

Author(s):

Stanisław Bielski

Keyword(s):

Weed Control ◽

Nitrogen Fertilization ◽

Positive Response ◽

Sowing Date ◽

Milk Thistle ◽

Row Spacing ◽

Control Methods ◽

Silybum Marianum

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Response of Some Bread Wheat Cultivars to Nitrogen Fertilizer Splitting Under Sandy Soil Conditions

Journal of Plant Production ◽

10.21608/jpp.2016.46870 ◽

2016 ◽

Vol 7 (9) ◽

pp. 1013-1019

Author(s):

M. Said ◽

A. AbdEl-Moneem

Keyword(s):

Bread Wheat ◽

Sandy Soil ◽

Nitrogen Fertilizer ◽

Soil Conditions ◽

Wheat Cultivars

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Effect of Row Spacing on Weed Control in Soybeans

Weed Science ◽

10.1017/s0043174500047743 ◽

1968 ◽

Vol 16 (4) ◽

pp. 462-465 ◽

Cited By ~ 72

Author(s):

L. M. Wax ◽

J. W. Pendleton

Keyword(s):

Glycine Max ◽

Weed Control ◽

Field Studies ◽

Row Spacing ◽

Control Methods ◽

Annual Grass ◽

Soybean Yield ◽

Yield Increase ◽

Triiodobenzoic Acid

Field studies were conducted over a 2-year period at Urbana, Illinois, to evaluate soybean (Glycine max (L.) Merr., var. Harosoy 63 and Wayne) and weed yields as influenced by row spacing, variety, weed control methods, and 2,3,5-triiodobenzoic acid (hereinafter referred to as TIBA). Soybean yield increased and weed yield decreased as row spacing was decreased. Compared to the yield from 40-inch rows, soybean yield increase was 10, 18, and 20% for 30, 20, and 10-inch rows, respectively. Both cultivation and applications of a,a,a-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine (trifluralin) controlled annual grass weeds at all row spacings. Cultivation controlled broadleaf weeds at all row spacings. Some broadleaf weeds, unaffected by trifluralin, made sufficient growth to impair soybean yields in wide rows but not in narrow rows.

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