Effects of Population Levels on Yield and Maturity of Maize Hybrids Grown on the Northern Great Plains<sup>1</sup>

Termunde, Darrold E.; Shank, D. B.; Dirks, V. A.

doi:10.2134/agronj1963.00021962005500060015x

Cited by 16 publications

(15 citation statements)

References 7 publications

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“…Table 4a showed that N application significantly influenced number of cobs at NIFOR, Uyo and Mokwa. The highest yield ought to have been recorded at the highest plant density, but the cob size decreased as population increased, which agrees with other results [16]. This confirms the fact that the number of cobs is directly related to yield.…”

Section: Resultssupporting

confidence: 91%

Effect of different nitrogen levels, plant population and soil nutrient status on yield and yield components of maize (Zea mays L.) in different ecological zones of Nigeria

Kayode

Agboola

1981

Fertilizer Research

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Field studies on the effect of nitrogen levels, plant population and soil nutrient status on maize yield and yield components at eight different sites representing six different ecological maize growing zones of Nigeria conducted during 1976Nigeria conducted during , 1977Nigeria conducted during and 1978 indicated that N significantly influenced yield at six of the eight sites, NIFOR, Umudike and Uyo (rain forest zone), Mokwa and Samaru (Savanna zone) and Riyom (derived savanna zone). Optimum N required for maize varies between 50 and 100 kgN in the different zones. There was no response to spacing except at Umudike, Uyo and Riyom, and no significant interaction between N and spacing at any location.Nitrogen application significantly influenced earweight at lkenne, NIFOR, Umudike, Uyo and Mokwa.Nitrogen application had a significant effect on the number of cobs at NIFOR, Uyo and Mokwa, while spacing significantly influenced number of cobs at all locations except Uyo. Husk weight was significantly increased by nitrogen application at four locations, NIFOR, Uyo, Mokwa and Samaru, but spacing had no effect on this yield component in any of the other locations except Umudike. There was an N by spacing interaction on husk weight at Umudike and Mokwa.Nitrogen application significantly influenced lodging at tasseling at Uyo, Mokwa and Riyom, whilst there was a significant effect of spacing at Uyo and Samaru. At harvest, lodging was not influenced by N application but spacing significantly affected lodging at Ibadan and NIFOR.Both N application and spacing had no significant effect on shelling percentage at any location.The high correlation between relative yield and available Zn(r = 0.77"), Cu (r = 0.63) and Fe (r = --0.66) of the soil at all the locations has shown that:(i) other nutrients besides N, P and K affected maize yield, therefore the inclusion of other nutrients besides N, P and K in the fertilizer recommendation for maize should be encouraged; (ii) different levels of NPK fertilizer plus other nutrients are required in each ecological zone and this can be determined by soil testing.Response of maize to varying plant population at different soil fertifity status depends on climatic conditions, spacing and genetic factors. It has been shown that differences in light utilization by varieties are related to their level *Significant at 5% level. Fertilizer Research 2:1 77-191 {1981) 016 7-1 731/81/0023-01 77 ¢02.25

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Section: Resultssupporting

confidence: 91%

Effect of different nitrogen levels, plant population and soil nutrient status on yield and yield components of maize (Zea mays L.) in different ecological zones of Nigeria

Kayode

Agboola

1981

Fertilizer Research

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“…Many workers have shown lodging to increase at higher densities (Zuber et al, 1960;Termunde et al, 1963;Rutger and Crowder, 1967), and these results are consistent with results of my study. Percentage lodging was increased by stress imposed by high plant densities, but planting date had no effect on lodging (Table 21).…”

Section: Harvest Indexsupporting

confidence: 92%

“…In several studies, percentage lodging was increased and stalk diameters were decreased as plant densities were increased (Zuber et al, 1960;Termunde et al, 1963;Rutger and Crowder, 1967). Allison (1969) showed that stem weight began to decrease in denser plantings three to four weeks after flowering.…”

Section: Density Tolerancementioning

confidence: 99%

Mass selection to improve cold and density tolerance of two maize populations

Mosely

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“…Confounding the results of the Georgia data are the different population densities for the two types of trials. Hybrid X population-density interactions have been reported to be significant in several studies (Colville et al, 1964;Duncan, 1954;Lang et al, 1956;Rutger and Crowder, 1967;Termunde et al, 1963). Most of the interactions have been associated with maturity differences.…”

Section: Results and Discussion Cornmentioning

confidence: 95%

Crop Performance Trials under Irrigated and Dryland Conditions

1993

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Corn (Zea mays L.) and soybean [Glycine nuJX (L.) Men·.] perfonnance trials are sometimes conducted under both irrigated und dryland conditions in the southeastern USA. It is not known whether irrigated trials are better trials statistically or if irrigation causes l"l~lative rank changes in hybrid or cultivar perfonnance. To answer these questions, corn data were examined from four different environmemts and three maturity groups, and soybean data were examined from five different environments and three maturity groups between 1987 and 1990. Water management x hybrid/cultivar interactions were evident in 8 of 12 corn data sets and 7 of 16 soybean data sets. Combining data across years eliminated the water management x hybrid/cultivar interac· tions in all soybean data sets and five of nine corn data sets. Irrigated corn trials produced year x hybrid interactions in seven ·~f nine data sets while dryland trials produced year x hybrid interactions in four of nine data sets. Irrigated trials were only slightly better than dryland trials in accounting for variation; i.e., larger r values but produced smaller error variances in four of 12 data sets of corn. Irrigated trials separated entries better in nearly half of the soybean data sets. The data suggested that irrigated trials were not statistically llletter trials than dryland trials in all situations. Water management x hybrid/ cultivar interactions suggest that data for irrigated and d1yland trials should be reported separately, and the year x hybrid/cultivar interactions indicated that multi-year data should be examine~! during hybrid/cultivar selection. Error variances, F probability values, and r values should be examined to detennine level of precision when comparing trials of equal composition.

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Effects of Population Levels on Yield and Maturity of Maize Hybrids Grown on the Northern Great Plains¹

Cited by 16 publications

References 7 publications

Effect of different nitrogen levels, plant population and soil nutrient status on yield and yield components of maize (Zea mays L.) in different ecological zones of Nigeria

Effect of different nitrogen levels, plant population and soil nutrient status on yield and yield components of maize (Zea mays L.) in different ecological zones of Nigeria

Mass selection to improve cold and density tolerance of two maize populations

Crop Performance Trials under Irrigated and Dryland Conditions

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Effects of Population Levels on Yield and Maturity of Maize Hybrids Grown on the Northern Great Plains1

Cited by 16 publications

References 7 publications

Effect of different nitrogen levels, plant population and soil nutrient status on yield and yield components of maize (Zea mays L.) in different ecological zones of Nigeria

Effect of different nitrogen levels, plant population and soil nutrient status on yield and yield components of maize (Zea mays L.) in different ecological zones of Nigeria

Mass selection to improve cold and density tolerance of two maize populations

Crop Performance Trials under Irrigated and Dryland Conditions

Contact Info

Product

Resources

About

Effects of Population Levels on Yield and Maturity of Maize Hybrids Grown on the Northern Great Plains¹