Abstract
Time of weed control and fertilizer application usually decide the profitability of crop production. The effects of weed control and macronutrients on maize crop were investigated. The study was undertaken in March 2009, using a RCBD design with split plot arrangements. The experimental set up was established at the Agricultural University Peshawar and seedbeds were prepared with the proper moisture regime. Maize was planted with one plot left weed free for first six weeks while another infested with weed. The combinations of macronutrients used were nitrogen, phosphorus, potassium, nitrogen-phosphorus, nitrogen-potassium, phosphorus-potassium and nitrogen-phosphorus-potassium. Control (no fertilizer) was included for comparison. The observations revealed that when a comparison was made between the application of fertilizers and weed control, the latter proved more important because weed infested plots had no harvestable maize plants. The role of main nutrients in crop production is well known and cannot be left aside, however weed infestation does not provide us a fair choice of fertilizers application. The maximum maize grain yield was recorded under nitrogen-phosphorus combination and promising results were obtained. The weeds and maize benefited equally in terms of fresh and dry weed biomass with an application of fertilizer in particular N singly or together with P. In view of this, application of fertilizer should be changed from broadcast to band and/or placement. In general, a positive interaction was seen between N and P promoting the growth of maize and weeds. It can be said that herbicide application for weed control is important because of the fact that hand weeding is not economical, difficult, time consuming because of perennial weeds and hot weather conditions in the month of June.
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Claims 6
Claim · model-written summary
Plots infested with weeds yielded no harvestable maize plants, compared with the plot kept weed free for the first six weeks.
- Treatment
- weed infestede0
- Interactor
- weede0weed
- Outcome
- harvestable maize plantse0
- Direction
- decreaseinferrede0
- Comparator
- weed freee1
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weed infested plots had no harvestable maize plants”
e1“one plot left weed free for first six weeks”
Claim · model-written summary
The maximum maize grain yield was recorded under the nitrogen-phosphorus combination.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum maize grain yield was recorded under nitrogen-phosphorus combination”
Claim · model-written summary
Fertilizer application, in particular N alone or together with P, benefited weeds and maize equally in fresh and dry weed biomass.
- Treatment
- fertilizer in particular N singly or together with Pe0
- Interactor
- weedse0weed
- Outcome
- fresh and dry weed biomasse0
- Direction
- benefitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The weeds and maize benefited equally in terms of fresh and dry weed biomass with an application of fertilizer in particular N singly or together with P”
Claim · model-written summary
A positive interaction between N and P promoted the growth of maize and weeds.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a positive interaction was seen between N and P promoting the growth of maize and weeds”
Claim · model-written summary
The authors recommend changing fertilizer application from broadcast to band and/or placement.
- Outcome
- application of fertilizer should be changed from broadcast to band and/or placemente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays L.”
e0“application of fertilizer should be changed from broadcast to band and/or placement”
Claim · model-written summary
The authors state that herbicide application for weed control is important because hand weeding is uneconomical and difficult.
- Outcome
- herbicide application for weed control is importante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays L.”
e0“herbicide application for weed control is important because of the fact that hand weeding is not economical”
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