Abstract
Two field experiments were conducted during the 2005 and 2006 growing seasons at the Experimental Farm of the National Research Centre at Shalakan, Kalubia Governorate, Egypt, to study the response of maize yield and its components and associated weeds to two irrigation intervals (every 2 and 3 weeks), three weed management treatments (metribuzin herbicide, hoeing twice at 25 and 40 days from sowing and weedy check) and four N forms (ammonium sulfate, ammonium nitrate, urea and calcium nitrate). Results showed that irrigation every 2 weeks significantly decreased grassy and total weeds and NK uptake by weeds. Providing maize plants by irrigation every 2 weeks significantly increased chlorophyll a leaf content, yield and its components, grain P content and protein yield/fed. Hoeing twice was more effective than metribuzin herbicide for controlling grassy and total weeds and lowering N, P and K uptake by weeds. Application of metribuzin markedly increased chlorophyll a leaf content, while hoeing twice was the effective treatment for increasing yield and its components, except ear diameter, and enhanced grain N content, protein % and protein yield/fed. Calcium nitrate significantly decreased dry weight of grassy and total weeds and NK uptake by weeds. Adding ammonium nitrate markedly increased chlorophyll a leaf content, number of rows/ear, 100-kernel weight and grain yield/fed. Irrigation every 2 weeks with metribuzin treatment gave the maximum values of 100-kernel weight, ear yield and grain yield /fed when ammonium nitrate as nitrogen form was used.
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Claims 13
Claim · model-written summary
Irrigation every two weeks significantly decreased grassy and total weeds and their N and K uptake.
- Treatment
- irrigation every 2 weekse0
- Interactor
- weedse0weed
- Outcome
- grassy and total weeds and NK uptake by weedse0
- Direction
- decreasede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“irrigation every 2 weeks significantly decreased grassy and total weeds and NK uptake by weeds.”
t0“MAIZE AND ASSOCIATED WEEDS”
Claim · model-written summary
Irrigation every two weeks significantly increased maize leaf chlorophyll a.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Providing maize plants by irrigation every 2 weeks significantly increased chlorophyll a leaf content, yield and its components, grain P content and protein yield/fed.”
Claim · model-written summary
Irrigation every two weeks significantly increased maize yield and its components.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Providing maize plants by irrigation every 2 weeks significantly increased chlorophyll a leaf content, yield and its components, grain P content and protein yield/fed.”
Claim · model-written summary
Irrigation every two weeks significantly increased maize grain P content.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Providing maize plants by irrigation every 2 weeks significantly increased chlorophyll a leaf content, yield and its components, grain P content and protein yield/fed.”
Claim · model-written summary
Irrigation every two weeks significantly increased maize protein yield per feddan.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Providing maize plants by irrigation every 2 weeks significantly increased chlorophyll a leaf content, yield and its components, grain P content and protein yield/fed.”
Claim · model-written summary
Hoeing twice controlled grassy and total weeds more effectively than metribuzin and lowered weed N, P and K uptake.
- Treatment
- Hoeing twicee0
- Interactor
- weedse0weed
- Outcome
- grassy and total weeds and lowering N, P and K uptake by weedse0
- Direction
- more effectivee0
- Comparator
- metribuzin herbicidee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hoeing twice was more effective than metribuzin herbicide for controlling grassy and total weeds and lowering N, P and K uptake by weeds.”
t0“MAIZE AND ASSOCIATED WEEDS”
Claim · model-written summary
Metribuzin markedly increased maize leaf chlorophyll a.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of metribuzin markedly increased chlorophyll a leaf content”
t0“MAIZE”
Claim · model-written summary
Hoeing twice increased maize yield and yield components except ear diameter.
- Treatment
- hoeing twicee0
- Outcome
- yield and its componentse0
- Direction
- increasinge0
- Qualifier
- except ear diametere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“hoeing twice was the effective treatment for increasing yield and its components, except ear diameter, and enhanced grain N content, protein % and protein yield/fed.”
t0“MAIZE”
Claim · model-written summary
Hoeing twice enhanced grain N content and protein percentage and yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“hoeing twice was the effective treatment for increasing yield and its components, except ear diameter, and enhanced grain N content, protein % and protein yield/fed.”
t0“MAIZE”
Claim · model-written summary
Calcium nitrate significantly decreased grassy and total weed dry weight and weed N and K uptake.
- Treatment
- Calcium nitratee0
- Interactor
- weedse0weed
- Outcome
- dry weight of grassy and total weeds and NK uptake by weedse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Calcium nitrate significantly decreased dry weight of grassy and total weeds and NK uptake by weeds.”
t0“MAIZE”
Claim · model-written summary
Ammonium nitrate markedly increased leaf chlorophyll a content.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Adding ammonium nitrate markedly increased chlorophyll a leaf content, number of rows/ear, 100-kernel weight and grain yield/fed.”
t0“MAIZE”
Claim · model-written summary
Ammonium nitrate markedly increased rows per ear, 100-kernel weight and grain yield per feddan.
- Treatment
- ammonium nitratee0
- Outcome
- number of rows/ear, 100-kernel weight and grain yield/fede0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Adding ammonium nitrate markedly increased chlorophyll a leaf content, number of rows/ear, 100-kernel weight and grain yield/fed.”
t0“MAIZE”
Claim · model-written summary
The combination of two-week irrigation, metribuzin and ammonium nitrate gave maximum 100-kernel weight, ear yield and grain yield.
- Treatment
- Irrigation every 2 weeks with metribuzin treatmente0
- Outcome
- 100-kernel weight, ear yield and grain yield /fede0
- Direction
- maximume0
- Qualifier
- ammonium nitrate as nitrogen forme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation every 2 weeks with metribuzin treatment gave the maximum values of 100-kernel weight, ear yield and grain yield /fed when ammonium nitrate as nitrogen form was used.”
t0“MAIZE”
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See all 104 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.