Abstract
Abstract The study was conducted in the Experiment Station belong to Department of Soil Sciences and Water Resources, College of Agriculture, Tikrit University, Saladin Governorate during autumn season of 2023 in gypsiferous soil, maize plants Gloria variety, of Serbian origin was planted to study effect of adding potassium fertilizer and spraying zinc and copper on yield characteristics of maize plants, study included addition of Potassium sulphate at a concentration of (41.5% K) as a source of potassium at three levels (0, 100, 200) kg K ha −1 , respectively, second factor was copper sulphate (CuSo 4 .5H 2 o) sprayed with three concentrations (0, 15, 35) mg Cu L −1 respectively and third factor was spraying zinc sulphate fertilizer (ZnSo 4 .7H 2 o) at three concentrations (0, 50, 100) mg Zn L −1 , respectively. Experimental results showed that potassium fertilizer at 200 kg K ha −1 excelled in giving it highest rows number of 14.21 row.cob −1 , cob length of 24.35 cm, grain yield of 14.076 (Mg.h −1 ) and highest weight of 500 grains of 196.90 (gm). Zinc spray treatment at 100 mg Zn L −1 also excelled in giving highest increase in rows number, cob length, grain yield and weight of 500 grains of 14.51 row.cob −1 , 24.23 cm, 13.587 Mg.h −1 and 194.95 gm, respectively. Copper spraying treatment at 35 mg Cu L −1 also excelled it gave highest values for studied traits of 14.43 row.cob −1 , 24.07cm, 13.553 Mg.h −1 and 195.52 gm for rows number, cob length, grain yield and weight of 500 grains, respectively. These qualities were significantly impacted by triple interactions between the research factors, especially interaction treatment K 2 Z 2 C 2 , yet control treatment K 0 Z 0 C 0 had the lowest values of these characteristics.
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Claims 13
Claim · model-written summary
Potassium at 200 kg K ha −1 gave the highest rows per cob, 14.21 row.cob −1.
- Treatment
- potassium fertilizer at 200 kg K ha −1e0
- Outcome
- rows numbere0
- Direction
- higheste0
- Value
- 14.21 row.cob −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“potassium fertilizer at 200 kg K ha −1 excelled in giving it highest rows number of 14.21 row.cob −1”
t0“Maize (Zea mays L.) Plants”
Claim · model-written summary
Potassium at 200 kg K ha −1 gave a cob length of 24.35 cm.
- Treatment
- potassium fertilizer at 200 kg K ha −1e0
- Outcome
- cob lengthe0
- Direction
- excellede0
- Value
- 24.35 cme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“potassium fertilizer at 200 kg K ha −1 excelled in giving it highest rows number of 14.21 row.cob −1 , cob length of 24.35 cm”
t0“Maize (Zea mays L.) Plants”
Claim · model-written summary
Potassium at 200 kg K ha −1 gave grain yield of 14.076 (Mg.h −1 ).
- Treatment
- potassium fertilizer at 200 kg K ha −1e0
- Outcome
- grain yielde0
- Direction
- excellede0
- Value
- 14.076 (Mg.h −1 )e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“potassium fertilizer at 200 kg K ha −1 excelled in giving it highest rows number of 14.21 row.cob −1 , cob length of 24.35 cm, grain yield of 14.076 (Mg.h −1 )”
t0“Maize (Zea mays L.) Plants”
Claim · model-written summary
Potassium at 200 kg K ha −1 gave the highest 500 grain weight of 196.90 (gm).
- Treatment
- potassium fertilizer at 200 kg K ha −1e0
- Outcome
- weight of 500 grainse0
- Direction
- higheste0
- Value
- 196.90 (gm)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“potassium fertilizer at 200 kg K ha −1 excelled in giving it highest rows number of 14.21 row.cob −1 , cob length of 24.35 cm, grain yield of 14.076 (Mg.h −1 ) and highest weight of 500 grains of 196.90 (gm)”
t0“Maize (Zea mays L.) Plants”
Claim · model-written summary
Zinc spray at 100 mg Zn L −1 gave the highest row number of 14.51 row.cob −1.
- Treatment
- Zinc spray treatment at 100 mg Zn L −1e0
- Outcome
- rows numbere0
- Direction
- highest increasee0
- Value
- 14.51 row.cob −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Zinc spray treatment at 100 mg Zn L −1 also excelled in giving highest increase in rows number, cob length, grain yield and weight of 500 grains of 14.51 row.cob −1 , 24.23 cm, 13.587 Mg.h −1 and 194.95 gm, respectively”
t0“Maize (Zea mays L.) Plants”
Claim · model-written summary
Zinc spray at 100 mg Zn L −1 gave cob length of 24.23 cm.
- Treatment
- Zinc spray treatment at 100 mg Zn L −1e0
- Outcome
- cob lengthe0
- Direction
- highest increasee0
- Value
- 24.23 cme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Zinc spray treatment at 100 mg Zn L −1 also excelled in giving highest increase in rows number, cob length, grain yield and weight of 500 grains of 14.51 row.cob −1 , 24.23 cm, 13.587 Mg.h −1 and 194.95 gm, respectively”
t0“Maize (Zea mays L.) Plants”
Claim · model-written summary
Zinc spray at 100 mg Zn L −1 gave grain yield of 13.587 Mg.h −1.
- Treatment
- Zinc spray treatment at 100 mg Zn L −1e0
- Outcome
- grain yielde0
- Direction
- highest increasee0
- Value
- 13.587 Mg.h −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Zinc spray treatment at 100 mg Zn L −1 also excelled in giving highest increase in rows number, cob length, grain yield and weight of 500 grains of 14.51 row.cob −1 , 24.23 cm, 13.587 Mg.h −1 and 194.95 gm, respectively”
t0“Maize (Zea mays L.) Plants”
Claim · model-written summary
Zinc spray at 100 mg Zn L −1 gave 500 grain weight of 194.95 gm.
- Treatment
- Zinc spray treatment at 100 mg Zn L −1e0
- Outcome
- weight of 500 grainse0
- Direction
- highest increasee0
- Value
- 194.95 gme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Zinc spray treatment at 100 mg Zn L −1 also excelled in giving highest increase in rows number, cob length, grain yield and weight of 500 grains of 14.51 row.cob −1 , 24.23 cm, 13.587 Mg.h −1 and 194.95 gm, respectively”
t0“Maize (Zea mays L.) Plants”
Claim · model-written summary
Copper spray at 35 mg Cu L −1 gave the highest row number of 14.43 row.cob −1.
- Treatment
- Copper spraying treatment at 35 mg Cu L −1e0
- Outcome
- rows numbere0
- Direction
- highest valuese0
- Value
- 14.43 row.cob −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Copper spraying treatment at 35 mg Cu L −1 also excelled it gave highest values for studied traits of 14.43 row.cob −1 , 24.07cm, 13.553 Mg.h −1 and 195.52 gm for rows number, cob length, grain yield and weight of 500 grains, respectively”
t0“Maize (Zea mays L.) Plants”
Claim · model-written summary
Copper spray at 35 mg Cu L −1 gave cob length of 24.07cm.
- Treatment
- Copper spraying treatment at 35 mg Cu L −1e0
- Outcome
- cob lengthe0
- Direction
- highest valuese0
- Value
- 24.07cme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Copper spraying treatment at 35 mg Cu L −1 also excelled it gave highest values for studied traits of 14.43 row.cob −1 , 24.07cm, 13.553 Mg.h −1 and 195.52 gm for rows number, cob length, grain yield and weight of 500 grains, respectively”
t0“Maize (Zea mays L.) Plants”
Claim · model-written summary
Copper spray at 35 mg Cu L −1 gave grain yield of 13.553 Mg.h −1.
- Treatment
- Copper spraying treatment at 35 mg Cu L −1e0
- Outcome
- grain yielde0
- Direction
- highest valuese0
- Value
- 13.553 Mg.h −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Copper spraying treatment at 35 mg Cu L −1 also excelled it gave highest values for studied traits of 14.43 row.cob −1 , 24.07cm, 13.553 Mg.h −1 and 195.52 gm for rows number, cob length, grain yield and weight of 500 grains, respectively”
t0“Maize (Zea mays L.) Plants”
Claim · model-written summary
Copper spray at 35 mg Cu L −1 gave 500 grain weight of 195.52 gm.
- Treatment
- Copper spraying treatment at 35 mg Cu L −1e0
- Outcome
- weight of 500 grainse0
- Direction
- highest valuese0
- Value
- 195.52 gme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Copper spraying treatment at 35 mg Cu L −1 also excelled it gave highest values for studied traits of 14.43 row.cob −1 , 24.07cm, 13.553 Mg.h −1 and 195.52 gm for rows number, cob length, grain yield and weight of 500 grains, respectively”
t0“Maize (Zea mays L.) Plants”
Claim · model-written summary
The triple interaction significantly affected the studied maize yield characteristics.
- Treatment
- triple interactions between the research factorse0
- Outcome
- These qualitiese0
- Qualifier
- especially interaction treatment K 2 Z 2 C 2e0
- Comparator
- control treatment K 0 Z 0 C 0e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“These qualities were significantly impacted by triple interactions between the research factors, especially interaction treatment K 2 Z 2 C 2 , yet control treatment K 0 Z 0 C 0 had the lowest values of these characteristics”
t0“Maize (Zea mays L.) Plants”
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