scholarly journals Planting-date Effects on Early maturing Pigeonpea in a Short-season Environment

1994 ◽  
Vol 4 (4) ◽  
pp. 379-382 ◽  
Author(s):  
Lurline Marsh
Keyword(s):  
Cajanus Cajan ◽  
Growth And Development ◽  
Planting Date ◽  
Degree Days ◽  
Production Potential ◽  
Temperate Region ◽  
Planting Dates ◽  
Growing Seasons ◽  
Early Maturing ◽  
Short Season

Determinate, photoperiod-insensitive genotypes of pigeonpea [Cajanus cajan (L.) Millsp.] have production potential for the short growing seasons of the temperate region. A 3-year field study was conducted to determine the effect of three planting dates on the growth and development of pigeonpea in Missouri. Seeds of four genotypes, ICPL 87 Isolation (85k), ICPL 85010, ICPL 85024, and ICPL 8304 were planted 1 May (PD1), 15 May (PD2), and 1 June (PD3). Germination of the earliest-planted seeds was <32%, but increased to an average of 57% for PD3. Earliest-planted seeds generally took the longest time to first flowering and harvest. The initial fresh pod harvest of plants from PD1 and PD2 overlapped. The earliest harvest was produced by ICPL 85024 from PD2 at 91 days (1300 degree-days C) after planting. Over the 3 years, the genotypes in PD1 produced the highest fresh pod weights (205-357 g/plant) and longest pods. Those of PD3 produced the lowest pod weight. The seed number per pod (three to four) and weight of 100 seeds (16-22 g) were generally unaffected by planting dates.

The effect of planting date on the yield and some fibre properties of cotton in the Namoi Valley

1976 ◽  
Vol 16 (79) ◽  
pp. 265 ◽  
Author(s):  
GA Constable ◽  
NV Harris ◽  
RE Paull
Keyword(s):  
Adverse Effect ◽  
Maximum Yield ◽  
Planting Date ◽  
Growing Degree Days ◽  
Degree Days ◽  
Planting Dates ◽  
Fibre Properties ◽  
Commercial Cultivar ◽  
Yield Variation ◽  
Early Maturing

The effect of planting dates between September 30 and November 30 on the yield and some fibre properties of two cotton cultivars has been studied over three seasons. The yield of the commercial cultivar (Deltapine Smoothleaf) fell by an average of 20 kg ha-1 day-1 delay in planting after October 20, earlier planting dates having equal yields, producing a plateau effect. The yield of an early maturing cultivar (Short Sympodial) fell linearly by 11 kg ha-1 day-1 delay in planting. Planting dates after mid-October had an adverse effect on micronaire in the commercial cultivar, but lint length and strength were not affected. Thus maximum yield and micronaire for plantings after mid-October came from the early cultivar. Tolerance to low temperature is an important factor in cultivar earliness, and accounts for the performance of Short Sympodial in these experiments. The number of days from first flower to first frost was as reliable as growing degree days in explaining yield variation within a cultivar

scholarly journals PLANTING DATE EFFECT ON PIGEONPEA DEVELOPMENT IN MID-MISSOURI

HortScience ◽  
1991 ◽  
Vol 26 (5) ◽  
pp. 494g-495
Author(s):  
Lurline Marsh ◽  
Mohsen Dkhili
Keyword(s):  
Field Study ◽  
Temperature Region ◽  
Cajanus Cajan ◽  
Growth And Development ◽  
Growing Season ◽  
Planting Date ◽  
Planting Dates ◽  
Pod Length ◽  
Number Of Seeds ◽  
Short Growing Season

Determinate, photoperiod-insensitive genotypes of pigeonpea, (Cajanus cajan) have the potential for production in the short growing season of the temperature region. A field study was conducted to determine the effect of three planting dates on the growth and development of this crop in Missouri. Seeds of four genotypes, ICPL 87 Isolation (85k), ICPL 85010, ICPL 85024 and ICPL 8304 were planted at three planting dates in 1990, May 1, May 15 and May 31. Germination of the earliest planted seeds was low but increased in the later planted ones. The earlier the planting date the longer was the time to flowering, but the earlier was pod maturity. The earliest planted group flowered within 78-110 days after planting. The genotypes in this group produced the highest fresh pod weights of 330-730 g/plant and the latest planted ones produced the least. Pod length, the number of seeds per pod and weight of 100 seeds had ranges of 5.1-5.9 cm, 3-4 seeds and 17-23 g, respectively and were unaffected by planting dates.

Influence of Soybean (Glycine max)Planting Date on Velvetleaf (Abutilon theophrasti)Competition

Weed Science ◽  
1979 ◽  
Vol 27 (2) ◽  
pp. 183-188 ◽  
Author(s):  
L. R. Oliver
Keyword(s):  
Glycine Max ◽  
Growth And Development ◽  
Early Growth ◽  
Photoperiodic Response ◽  
Planting Date ◽  
Abutilon Theophrasti ◽  
Growth Stages ◽  
Planting Dates ◽  
Late Planting ◽  
Early Maturing

A 2-yr study was conducted to determine the influence of early and late soybean [Glycine max(L.) Merr.] planting dates on the competitiveness of velvetleaf (Abutilon theophrastiMedic). Velvetleaf was planted at densities of one plant per 61 and 30 cm of row, and competition ranged from 4 weeks to full season. Soybean planting dates were mid-May and late-June. Velvetleaf emerging with soybeans in mid-May were twice as competitive as those emerging with soybeans planted in late-June. A density of one velvetleaf per 30 cm of row competing full season reduced soybean yields 27% for the early and only 14% for the late planting date. The competitive difference was due to the short-day photoperiodic response of velvetleaf. Although the early growth stages of soybeans are more competitive than those of velvetleaf, 10 weeks after emergence velvetleaf competition reduced soybean growth and development. Velvetleaf does not appear to be a potential major problem in Arkansas for soybeans planted in June due to its photoperiodic response and late season competitiveness. However, the weed could present problems for soybeans planted early, especially when an early maturing variety is used.

Planting Date Affects Survival and Height Growth of Hybrid Poplar

1986 ◽  
Vol 62 (3) ◽  
pp. 164-169 ◽  
Author(s):  
Edward A. Hansen
Keyword(s):  
Hybrid Poplar ◽  
Late Summer ◽  
Growing Season ◽  
Climatic Conditions ◽  
Planting Date ◽  
Planting Dates ◽  
Soil Frost ◽  
Growing Seasons ◽  
Poplar Cuttings ◽  
Energy Plantations

In this study I investigated the effects of planting date for soaked versus unsoaked cuttings of two hybrid poplar clones under irrigated versus unirrigated and weedy versus weed-free conditions. Cuttings were planted each year for 4 years. Survival at the end of the first growing season was generally greater than 90% for all planting dates. At the end of the second growing season survival for trees planted before July 16 was again generally more than 90%. However, cuttings planted from July 30 through August 27 showed a major decline in survival and survival of fall planted cuttings ranged from 6 to 90%. Mortality of late summer- or fall-planted cuttings occurred prior to the beginning of the second growing season and was attributed to frost heaving. The tallest trees were not those planted at the earliest possible dates (April in Rhinelander). Instead, the tallest trees at the end of the first and second growing seasons were those planted in early- and mid-May. This optimum planting period was the same regardless of clone, soaking, irrigation, or weed treatment. Actual optimum planting date would change with location and local climatic conditions. Some climatic indices may prove more universal in predicting when to plant. Although tentative, it appears that for best growth, unrooted hybrid poplar cuttings should be planted in soil warmer than 10 °C. Trees do not grow as well if planted immediately after soil frost leaves the ground. Key words: Energy plantations, plantation establishment, woody biomass, intensive culture, Populus.

RESPONSES TO PLANTING DATE AND POPULATION DENSITY BY EARLY-MATURING SORGHUM HYBRIDS IN ONTARIO

1981 ◽  
Vol 61 (2) ◽  
pp. 265-273
Author(s):  
D. J. HUME ◽  
YILMA KEBEDE
Keyword(s):  
Plant Density ◽  
Late Summer ◽  
Hybrid Plant ◽  
Planting Date ◽  
Planting Dates ◽  
Grain Yields ◽  
South Central ◽  
Early Maturing ◽  
Plant Densities ◽  
Sorghum Grain

Early-maturing grain sorghum (Sorghum bicolor (L.) Moench) hybrids which have potential usefulness in southern Ontario are commercially available. One such hybrid, Pride P130, and two experimental hybrids, Pride X4043 and Pride X3160, were grown at three planting dates and three plant densities in 1975 and 1976 at Elora, Ontario. There were several hybrid × planting date and hybrid × plant density interactions for the development and yield parameters measured. However, grain yields of all hybrids decreased by about 10% per week when plantings were delayed 2 or 4 wk after mid-May in 1975. In 1976, yields declined even more after late planting. Increasing populations from 75 000 to 300 000 plants/ha in 1975 increased grain yields from 4.3 to 6.0 t/ha, averaged over hybrids and planting dates. In 1976, raising populations from 150 000 to 450 000 plants/ha increased average yields from 3.2 to 3.7 t/ha. P130 was the earliest and best-yielding hybrid in both years. In 1975, which had a warm May and near-average temperatures, the best treatment yielded 7.3 t grain/ha and hybrids at all planting dates matured. The best treatment approached grain corn (Zea mays L.) yields. In 1976 with a cool spring and late summer, the highest grain yield was 5.7 t/ha with early planting, but 11 June plantings did not mature. In south-central Ontario, sorghum grain yields appear less reliable than those of corn.

Yield of two yam (Dioscorea alata) cultivars with three planting dates and two planting systems.

1969 ◽  
Vol 77 (3-4) ◽  
pp. 161-166
Author(s):  
Héber Irizarry ◽  
Edmundo Rivera
Keyword(s):  
Planting Date ◽  
Tuber Size ◽  
Dioscorea Alata ◽  
Production Potential ◽  
Planting Dates ◽  
Close Spacing ◽  
Planting System

The production potential of yams cv. Binugas and Gunung was determined by using three planting dates and two planting systems. The yams were planted in March, May and July 1990 on raised and flat rows without vine support at the close spacing of .91 by .30 m. Regardless of planting date and planting system, these cultivars performed similarly with respect to marketable and premium weights, tuber size and non-marketable weight. Planting system has no significant effect on cultivar performance. The best planting date was March, with a marketable production of 70,590 kg/ha. About 88.2% or 62,254 kg/ha was highly graded tubers. The delay in planting from March to July significantly reduced yields by 44.8%.

Effects of planting date and dinocap applications on the control of powdery mildew and yields of seed and seed oil in coriander

2000 ◽  
Vol 135 (2) ◽  
pp. 193-197
Author(s):  
A. KALRA ◽  
T. N. PARAMESWARAN ◽  
N. S. RAVINDRA ◽  
M. GOPAL RAO ◽  
SUSHIL KUMAR
Keyword(s):  
Powdery Mildew ◽  
Disease Severity ◽  
Seed Oil ◽  
Planting Date ◽  
Planting Dates ◽  
Early Planting ◽  
Early Maturing ◽  
Levels Of Control

Experiments were conducted during 1992/93 and 1993/94 to determine the effect of different planting dates and dinocap applications on control of powdery mildew and yields of early and late maturing coriander cultivars. Early plantings resulted in lower overall disease severity values for both the cultivars, but the late maturing cultivar S-33 benefited more than RD-44, an early maturing cultivar. Early planting resulted in smaller increases in yield in RD-44 but provided considerable economic gains in S-33. Further, it was possible to achieve similar levels of control of powdery mildew and yields in coriander with fewer dinocap applications by early plantings of both the cultivars. Therefore, to reduce the fungicide inputs, it is important that emphasis should be placed on early plantings for managing powdery mildew especially in environments conducive for its development.

scholarly journals Intercropping Morphologically Different Cowpeas With Pearl Millet in a Short Season Environment in the Sahel

1990 ◽  
Vol 26 (1) ◽  
pp. 41-47 ◽  
Author(s):  
Bonny R. Ntare
Keyword(s):  
Pearl Millet ◽  
Field Trials ◽  
Planting Date ◽  
Sharp Reduction ◽  
Planting Pattern ◽  
Late Planting ◽  
Cowpea Cultivars ◽  
Local Cultivar ◽  
Early Maturing ◽  
Short Season

SUMMARYThe effects on yield of varying the planting date and planting pattern of morphologically different cowpea cultivars intercropped with pearl millet were studied in two field trials. The interaction between cowpea cultivars and planting date was highly significant. There was a sharp reduction in cowpea yields with late planting. Millet yields were reduced less when sown simultaneously with early cowpea cultivars than when sown with a late maturing local cultivar. Early maturing cowpea cultivars planted in closely spaced hills had less effect on millet yields than a late maturing cultivar sown in widely spaced hills. An appropriate cowpea cultivar for intercropping with peal millet would be one that was weakly competitive and that yielded both grain and fodder.

scholarly journals Effects of planting time on growth, development and productivity of maize (Zea mays L.)

2018 ◽  
Vol 1 (1) ◽  
pp. 43-50
Author(s):  
Jiban Shrestha ◽  
Manoj Kandel ◽  
Amit Chaudhary
Keyword(s):  
Growth And Development ◽  
Crop Production ◽  
Disease Incidence ◽  
Grain Filling ◽  
Planting Date ◽  
Crop Modeling ◽  
Planting Dates ◽  
Late Planting ◽  
Maize Growth ◽  
Growth Development

Planting date plays important role in the growth, development and yield of maize. Optimum planting date has becomes a prime importance for higher crop production. The plant establishment as well as pest and disease incidence are affected by planting dates. Crop varieties respond differently to planting dates. Early or late planting dates on maize causes an array of morpho-anatomical, physiological and biochemical changes in plants, which affect plant growth and development and such changes may lead to a drastic reduction in yield. Maize growth and development involves numerous biochemical reactions which are sensitive to variance in weather parameters as affected by planting dates. Delayed planting dates affect traits namely anthesis silking interval, photosynthesis, physiological maturity and dry matter production due to reduction in cumulative interception of photosynthetically active radiation (PAR). Late planting dates cause higher non-structural carbohydrate concentration in stems at mid-grain filling stages due to low temperature exposure of crop limiting kernel growth and photosynthesis. The adverse effects of delayed planting dates can be mitigated by forecasting optimum planting dates through crop modeling experiments. This article summarizes various effects of planting dates on maize growth, development and yield parameters. This information may be useful for maize growers and researchers.

Response of soya beans to planting date in south-eastern Queensland. I. Influence of photoperiod and temperature on phasic developmental patterns

1973 ◽  
Vol 24 (1) ◽  
pp. 67 ◽  
Author(s):  
RJ Lawn ◽  
DE Byth
Keyword(s):  
Photoperiodic Response ◽  
Planting Date ◽  
Day Length ◽  
Planting Dates ◽  
Test Environment ◽  
Developmental Patterns ◽  
Development Patterns ◽  
Flowering Phase ◽  
Early Maturing ◽  
Phases Of Development

Phenological development of a range of soya bean cultivars for a series of planting dates was studied at Redland Bay, Queensland. Responses in the duration of the phasic development patterns were related to the changes in day length and temperature regime during each phase. Genetic lateness of maturity among cultivars was associated with increasing sensitivity to photoperiod during all phases of development. The earliest-maturing cultivars were effectively day-neutral in the photoperiodic range of the test environment and exhibited significant response to photoperiod during the flowering phase only. In contrast, the pre-flowering, flowering, and post-flowering phases of later cultivars were considerably extended for those planting dates which involved the occurrence of these phases during the periods of longest day length. Late-maturing cultivars were sufficiently sensitive to photoperiod during the pre-flowering and flowering phases for the post-flowering phase to be delayed until the occurrence of short day lengths towards the end of the season. Temperature effects were apparent only in the absence of a strong photoperiodic response. Longer pre-flowering phases for early plantings of early-maturing cultivars were associated with lower daily temperatures early in the season. Similarly, extended post-flowering periods and delayed maturity for late plantings of late-maturing cultivars were associated with lower daily temperatures late in the season. It is suggested that the patterns of response described may be expected to recur in most environments for that range of cultivars which is capable of successful reproductive growth in each environment.

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