Abstract
The crop technology of maize has two important elements, sowing time and plant density. In 2003 and 2004 we studied the effect of these two factors on the growth and production of maize in an experiment carried out near Hajdúböszörmény.The soil of the experimental plots was meadow soil.Weather in both years was differed greatly. 2003 was drought. Neither the distribution nor the quantity of the precipitation were suitable in the growing season for maize. This fact basically determined the results.In 2004, we could talk about a favorable and rainy season. The distribution and quantity of precipitation was suitable between April and September. The average temperature was also suitable for maize.Results of the sowing time experiment:In 2003, we tested seven hybrids at four sowing times. Hybrids in the early maturity group gave the highest yield at the later sowing time, while the hybrids of the long maturity group gave it at the earlier planting time. The yield of PR34B97, PR36N70, PR36M53 hybrids was the best at every planting time. The moisture loss of hybrids in the late maturity group was faster in the maturity season, but the seed moisture content was higher than the hybrids with early sowing time. The seed moisture content was very low due to the droughty year. In two hybrid cases, this value was higher than 20% only at the fourth sowing time.In 2004, we examined the yield and seed moisture content of nine hybrids. In the favorable crop year, the yield of every hybrid was the highest at the second and third sowing time. Yields of PR34H31 and PR38B85 hybrids were significant. The seed moisture content at harvest was higher than the previous year due to the rainy season. In the case of hybrids sown later, this value was higher by 30%. However, we noticed that this value was lower at the earlier sowing time than at the later.The crop year had a more dynamic effect on maize than the sowing time. First of all, the quantity and distribution of precipitation played an important role in respect to yield safety.Results of the plant density experiment:We tested the reaction of hybrids at four plant densities (45,000, 60,000, 75,000 and 90,000 stock/ha) every two years. In 2003, the tested seven hybrids reached the highest yield at the 90,000 stock/ha in the face of a droughty year. The effect of forecrop and favorable nutrients caused these results. In the rainy 2004 year, the yield grew linear with the growing plant density. The yield of the best hybrids were 14-15 t/ha at the 90,000 stock/ha.Such a high plant density (90,000 stock/ha) couldn’t adaptable in farm conditions in rainy season. It is practical to determine the interval of plant density besides the optimum plant density of hybrids which gave correct yield. The farmers have to use the low value of this interval due to the frequent of the droughty years.
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Claims 15
Claim · model-written summary
Early maturity hybrids yielded most at later sowing in 2003.
- Material
- Hybrids in the early maturity groupe0
- Treatment
- later sowing timee0
- Outcome
- yielde0
- Direction
- higheste0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MaizeHybrids”
e0“Hybrids in the early maturity group gave the highest yield at the later sowing time, while the hybrids of the long maturity group gave it at the earlier planting time.”
Claim · model-written summary
Long maturity hybrids yielded most at earlier planting in 2003.
- Material
- hybrids of the long maturity groupe0
- Treatment
- earlier planting timee0
- Outcome
- yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MaizeHybrids”
e0“Hybrids in the early maturity group gave the highest yield at the later sowing time, while the hybrids of the long maturity group gave it at the earlier planting time.”
Claim · model-written summary
PR34B97, PR36N70 and PR36M53 had the best yield at every sowing time.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MaizeHybrids”
e0“The yield of PR34B97, PR36N70, PR36M53 hybrids was the best at every planting time.”
Claim · model-written summary
Late maturity hybrids lost moisture faster during maturation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MaizeHybrids”
e0“The moisture loss of hybrids in the late maturity group was faster in the maturity season”
Claim · model-written summary
Late maturity hybrids had higher seed moisture than early-sown hybrids.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MaizeHybrids”
e0“the seed moisture content was higher than the hybrids with early sowing time”
Claim · model-written summary
Drought-year seed moisture was very low, exceeding 20% only for two hybrids at the fourth sowing time.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MaizeHybrids”
e0“The seed moisture content was very low due to the droughty year. In two hybrid cases, this value was higher than 20% only at the fourth sowing time.”
Claim · model-written summary
In 2004 every hybrid yielded most at the second and third sowing times.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MaizeHybrids”
e0“In the favorable crop year, the yield of every hybrid was the highest at the second and third sowing time.”
Claim · model-written summary
PR34H31 and PR38B85 yields were reported as significant.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MaizeHybrids”
e0“Yields of PR34H31 and PR38B85 hybrids were significant.”
Claim · model-written summary
Harvest seed moisture was higher in rainy 2004 than the preceding year.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MaizeHybrids”
e0“The seed moisture content at harvest was higher than the previous year due to the rainy season.”
Claim · model-written summary
Later sowing increased seed moisture by 30%.
- Treatment
- hybrids sown latere0
- Outcome
- this valuee0
- Direction
- highere0
- Value
- 30%e0
- Comparator
- earlier sowing timee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MaizeHybrids”
e0“In the case of hybrids sown later, this value was higher by 30%. However, we noticed that this value was lower at the earlier sowing time than at the later.”
Claim · model-written summary
Crop year influenced maize more strongly than sowing time.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The crop year had a more dynamic effect on maize than the sowing time.”
Claim · model-written summary
In droughty 2003, tested hybrids yielded most at 90,000 stock/ha.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MaizeHybrids”
e0“In 2003, the tested seven hybrids reached the highest yield at the 90,000 stock/ha in the face of a droughty year.”
Claim · model-written summary
In rainy 2004, yield increased linearly with plant density.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MaizeHybrids”
e0“In the rainy 2004 year, the yield grew linear with the growing plant density.”
Claim · model-written summary
Best hybrid yields at 90,000 stock/ha were 14-15 t/ha.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MaizeHybrids”
e0“The yield of the best hybrids were 14-15 t/ha at the 90,000 stock/ha.”
Claim · model-written summary
Authors advise using the low end of the optimum density range because drought years are frequent.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MaizeHybrids”
e0“The farmers have to use the low value of this interval due to the frequent of the droughty years.”
The same questions in other papers
sowing time · yield · Zea mays (maize)Positive and negative results
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