Effect Of Planting Time Research Articles

Effect of planting time on the incidence of crown rot (Gibberella zeae) in wheat

In the time pf planting experiments with wheat conducted from 1963 1967 on the Darling Downs in QLD, late sowing always produced much less crown rot than early sowing. Although seed inoculated with a spore suspension of the casual fungus (Gibberella zeae) produced a higher percentage of diseased plants. The relation between time of planting and disease incidence was not disturbed. No direct relation between temperature or rainfall and disease incidence was apparent.

Effect of Planting Time on Canopy Structure and Biomass Production in Some Soybean Genotypes

A field experiment was conducted in the Field Laboratory of the Department of Crop Botany, BAU, Mymensingh during November 2003 to May 2004 to assess the effect of planting time (November and December) on some morphological structure, and root & shoot biomass production in four soybean genotypes (GPB-1, GPB-2, AGS-332 and AGS-11-35). The plant height, stem base diameter, seed dry weight plant-1 were significantly greater in the late planting crops (December) but number of branches plant-1, number of leaves plant-1, leaves dry weight plant-1, shoots dry weight plant-1, roots dry weight plant-1, total dry matter plant-1 were also significantly greater in November planting. Highest plant height, branches plant-1 and leaves plant-1, shoot dry weight plant-1 and total dry matter were found in GPB-2 genotype. Key words: Early and late planting, shoot and root mass, Glycine max. DOI = 10.3329/jard.v5i1.1453 J Agric Rural Dev 5(1&2), 25-29, June 2007

The influence of planting date, row spacing, and herbicides on the yield of soybeans in Canterbury

Abstract A field experiment based on a 34 factorial design was used to evaluate the effects of planting times, row spacings, and herbicide treatments on the growth and yield of Adelphia, Amsoy, and Wayne soybeans (Glycine max (L) Merrill) in Canterbury, New Zealand, in 1967–68. In this location the interval between planting and maturation was extended beyond that which normally occurs in the regions for which these varieties are best suited. The earliest maturing cultivar, Amsoy, was more successful at Lincoln, and data indicate that even earlier maturing varieties may be more suitable. Soybeans sown at 20 in. row spacings in mid-November produced highest grain yields with a minimum of agronomic difficulties. Generally soybeans grown in rows 20 in. apart outyielded those grown at wider row spacings and suffered less from weed competition. Both Treflan and Amiben treatments increased grain yields, particularly where soybeans were grown at 30 and 40 in. row spacings, even though the trifluralin applications...

The Effects of Planting Time, Runner Size and Plant Spacing on the Yield of Strawberries

SummaryIn experiments over the period 1962–64 in southern England the effects of runner size, planting time and in-row spacing were compared with regard to the yield of one-year strawberry plants. Planting time had the greatest effect. Early planting markedly increased yield, though runner size interacted with it. In August, runner size had no effect, very small runners yielding as well as large ones but, from September planting, large runners outyielded smaller runners. Plots with spacing of six inches in the row outyielded those with spacing of twelve inches.The experimental treatments did not have a marked effect on the yield of large berries in 1962, but in 1963, when growth was less vigorous, treatment effects were similar to those on overall yield. The yield of very early, ripe fruit was greatest from the September-planted runners. Plant spacing had no effect on time of ripening.The difference in growth and crop between the two years was probably related to the soil and to air-temperature differences each autumn after planting.In the second season of each trial, plant spacing was doubled, by removal of alternate plants. The original planting treatments had few significant effects on the yield from the spaced, two-year old plants. From both one-and two-year-old plants Cambridge Favourite outyielded Cambridge Rival, but the latter gave more early ripe fruit and less waste fruit.

Effect of Planting Time and Photoperiod on Tephrosia vogelii

AbstractTwenty‐six consecutive plantings of Tephrosia vogelii were made at 2‐week intervals at Mayaguez, Puerto Rico, to determine the effect of planting time on growth rate, flowering, and rotenoid content. The replicated plantings showed that maximum growth occurred in the spring, irrespective of planting time. Flowering occurred as a photoperiodic response to a 13‐hour day or to an interrupted night. Leaf‐rotenoid content as measured by the red‐color test was lowest in spring and highest in fall in plants of the same age.

Studies on the cultivation of Chinese yam. (IV)

This paper deals with two experiments carried out on the planting time and pre-sprouting treatment of seed pieces in Hokkaido. The results obtained may be summarized as follows: (a) The effect of planting time and pre-sprouting treatment on the growth and yield. Six plots listed as follows were adopted for deter-mining the most desirable planting time of seed pieces in Hokkaido. Plot A: Planted April 13, treated* Plot B: Planted April untreated** Plot C: Planted May 13, treated Plot D: Planted May untreated Plot E: Planted June 13, treated Plot F: Planted June untreated * treated: Seed pieces were first planted in a hot-bed and transplanted to the field when the adventive bud appeared as a small knob. ** untreated: Seed pieces were set in the field directly. 1. While the sprouting time was earlier in seed pieces planted early, the time required for sprouting was longer than that for seed pieces planted later. 2. In treated seed pieces the time for sprouting was shortened remarkably as compared with that for the untreated ones. As compared A with B, A spro-uted 18 days earlier; between C and D, C sprouted 13 days earlier; and between E and F, E sprouted 4 days earlier. 3. With respect to the yield, the earlier the sprouting took place, the larger was the yield. Taking the yield of plot D as 100, the yields of A, B, C, E and F became 129. 9, 109. 0, 119.8, 83.0 and 74. 1 respectively. (b) The effect of the degree of pre-sprouting treatment on the yield and multiple formation of tuberous roots. Four plots as listed below were adopted for a determination of the most desirable degree of pre-sprouting. Plot A': Seed pieces were set in the field directly. (Control) Plot B' Seed pieces were treated until the adventive bud was visible. Plot C': Seed pieces were treated until the young stem and the young tuberous root were distinguishable. Plot D': Seed pieces were treated to such an extent that both the stem and the tuberous root were approximately 3cm in length. 1. The seed pieces in treated plots sprouted con-siderably earlier than those in control plot. Among the seed pieces in treated plots, the earliness of sprout emergence had a tendency to occur proportion-ately to the degree of treatment. However, the differences between emergence times of each treated plot were not remarkable. 2. Nearly a quarter of the seed pieces in plots C' and D' failed to elongate their sprouts above the ground. This is due to sprout damage caused by sudden environmental change. 3. While pre-sprouting treatment raised the yield per plant, plot B' alone showed a higher yield based upon area. 4. Occasionally a single plant produces two or more tuberous roots. This phenomenon is designated by the authors as “multiple formation of tuberous roots”. From the standpoint of customary practice in the growing of yams, this is undesirable since it is responsible for more culls. It was further observed that more plants showed multiple formation in treated plots than in control plot. From the results of the two experiments, it may be concluded that seed pieces should be planted early in May in Hokkaido and a slight pre-sprouting as in plot B' is recommendable, if the size of tuberous roots is not considered and only a greater yield is desired.

Efeito da época de semeação na produção do Hibiscus cannabinus L.

SUMMARY In order to determine the effect of planting time on growth and yield of kenaf (Hibiscus cannabinus L.), experimental trials in randomized blocks were conducted on various soils in different localities of the State of Sao Paulo, during the crop years 1947-48, 1948-49, and 1949-50. Plantings were made at 15 day intervals, beginning Octobre 15, and ending November 30, in rows 20 cm appart and seeded at the rate of 50 kilograms of seed per hectare in the 1947-48 plantings, and in rows 30 cm appart and seeded at the rate of 33 kilo­grams of seed per hectare in the 1948-49 and 1949-50 plantings. Harvest operations were carried out at the time the plants were in full bloom and green weight of foliated stems were determined. Average yield data showed that higher yields of green foliated stems were obtained from plantings made on October 15 and October 30. The data on average height attained by the plants for each date of plantings tested show a decrease from the first (Oct. 15) to the last (Nov. 30) plantings.