Effect of Planting Date, Plant Spacing, and Weed Cover on Populations of Insects, Arachnids, and Entomophthoran Fungi in Potato Fields

1984 ◽  
Vol 13 (3) ◽  
pp. 751-756 ◽  
Author(s):  
Gilles Boiteau
Keyword(s):  
Planting Date ◽  
Plant Spacing ◽  
Weed Cover

scholarly journals Planting date and in-row plant spacing effects on growth and yield of cabbage under plastic mulch

2016 ◽  
Vol 202 ◽  
pp. 49-56 ◽  
Author(s):  
Lucas G. Paranhos ◽  
Charles E. Barrett ◽  
Lincoln Zotarelli ◽  
Rebecca Darnell ◽  
Kati Migliaccio ◽  
...  
Keyword(s):  
Planting Date ◽  
Growth And Yield ◽  
Plant Spacing ◽  
Plastic Mulch ◽  
Spacing Effects

scholarly journals Optimizing Sweetpotato Production for Fresh and Processing Markets through Plant Spacing and Planting-harvest Time

2014 ◽  
Vol 24 (1) ◽  
pp. 16-24 ◽  
Author(s):  
Ramón A. Arancibia ◽  
Cody D. Smith ◽  
Don R. LaBonte ◽  
Jeffrey L. Main ◽  
Tara P. Smith ◽  
...  
Keyword(s):  
Plant Density ◽  
Economic Assessment ◽  
Planting Date ◽  
Plant Spacing ◽  
Net Benefit ◽  
Fresh Market ◽  
Marketable Yield ◽  
Processing Industry ◽  
Yield Increase ◽  
Row Width

Consumption of sweetpotato (Ipomoea batatas) has increased in the past decade in part because of its nutritional and health attributes, and because of the availability and convenience of processed products. The sweetpotato processing industry is expanding and supplying more sweetpotato products than ever before. Unlike the medium-sized roots (U.S. no.1) preferred for fresh market, large (jumbo) roots is accepted and in certain cases desired by the processing industry, and overall yield is preferred over strict sizing requirements and aesthetic appeal. Therefore, this study investigated the yield increase and grade proportions in response to plant spacing and extension of the growing period to improve profitability of the production system. Experiments with ‘Beauregard’ and ‘Evangeline’ sweetpotato were conducted in Mississippi and Louisiana during 2010 and 2011. Treatments consisted of a combination of early and late planting date and delay in harvest, in-row plant spacing, and row width. Yield increase was inconsistent with delaying harvest and appears to depend on environmental conditions at harvest late in the season. Marketable yield was consistently greater in early plantings than late plantings. Yield of U.S. no.1 grade was unaffected by delaying harvest regardless of planting date. Delaying harvest in early plantings contributed to increase jumbo-sized roots and marketable yield. The economic assessment of delaying harvest in early plantings indicated a gain in net benefit either when hand harvested for fresh market or field run bulk harvested for processing. Row width and in-row plant spacing had only a marginal effect on yield of canner grade (small-sized roots). The economic assessment of changing plant density indicated no gain in net benefit, which indicates that choice of plant density can depend on other factors.

scholarly journals EFFECT OF PLANT SPACING AND PLANTING DATE ON YIELD OF ANNUAL STRAWBERRY SYSTEM IN NEW JERSEY

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 636g-637
Author(s):  
Joseph A. Fiola
Keyword(s):  
New Jersey ◽  
Fruit Quality ◽  
Size Range ◽  
Fruit Size ◽  
Planting Date ◽  
Plant Spacing ◽  
Planting Dates ◽  
Row Covers ◽  
Date Fruit ◽  
High Range

High density strawberry planting systems have increased yield and fruit quality, and allow greater production on small acreage. To adapt the system to New Jersey conditions, replicated plantings of `Chandler', `Tribute', and `Tristar' were established at 3 spacings and two planting dates (9/9, 9/15) in 1989, and two plant spacings and two planting dates (8/14, 9/7) in 1990. Plants were propagated as plugs from runner tips. The plantings were covered with floating row covers (polypropylene) in December, covers were removed in early April at 5% bloom. In 1990, `Chandler' yield increased as density increased, and decreased with later planting date. Fruit quality was very good; saleable % was over 90%. Size ranged from 8 to 21 g., and averaged from 12 to 17 g. for the various treatments. `Tribute' responded similar to `Chandler' but `Tristar' yield at 12″ was not significantly different than 6″, but greater than 9″. Size ranged from 9 to 19 g., and averaged from 10 to 14 g.; saleable % was over 85%. In 1991, 2 spacings (6″, 12″) and 2 planting dates (8/24, 9/7) were tested. The earlier planting date was superior to later; yields were not different between the 6″ and 12″ treatments (yield range: 3.8-5.4 T/A). Size was superior at wider spacing; day-neutral fruit size was small (avg fruit size range: 7.7-11.2g; high range: 10.1-17.4g).

Response of cotton genotypes to planting date and plant spacing

2011 ◽  
Vol 5 (3) ◽  
pp. 262-267 ◽  
Author(s):  
Muhammad Iqbal ◽  
Mueen Alam Khan
Keyword(s):  
Planting Date ◽  
Plant Spacing ◽  
Cotton Genotypes

scholarly journals Effect of Planting Date and Plant Spacing on the Rotenoid Production of Tephrosia vogelii in Puerto Rico

1969 ◽  
Vol 55 (1) ◽  
pp. 85-93
Author(s):  
R. H. Freyre ◽  
D. K. Barnes
Keyword(s):  
Puerto Rico ◽  
Plant Height ◽  
Management System ◽  
Dry Weight ◽  
Planting Date ◽  
Plant Spacing ◽  
Planting Dates ◽  
Plant Weight ◽  
Affected Plant ◽  
Tephrosia Vogelii

The effect of within-row plant spacing (approximately 19, 34 and 57 cm.) and time of planting (April 1, April 29, May 27) on rotenoid and seed production of Tephrosia vogelii in Puerto Rico is reported. Percent total rotenoids and seed yield per plant varied among lines, but were not significantly affected by plant spacing and time of planting. Planting date significantly affected time from planting to flowering and proportion of leaves to stem. The April 1 planting date increased number of days to flowering, thereby increasing leaf losses from diseases and senescence as compared to the April 29 and May 27 planting dates. Plant spacing significantly affected plant height, total plant dry weight per hectare and proportion of leaves to stem. Close plant-spacing tended to increase plant height and total dry plant weight, and to lower proportion of leaves. These results indicated that the most efficient crop management system of T. vogelii for Puerto Rico would include a May 27 planting date, with a plant population of about 53,000 plants per hectare. Experimental yields of approximately 280 kg. of total rotenoids or 550 kg. of seed per hectare were obtained from this management system.

scholarly journals EFFECT OF PLANT SPACING ON YIELD OF SELECTED SWEET POTATO CULTIVARS WITH VARIOUS PLANTING DATES.

HortScience ◽  
1992 ◽  
Vol 27 (11) ◽  
pp. 1165a-1165
Author(s):  
W.A. Mulkey ◽  
W.B. McLemore
Keyword(s):  
Sweet Potato ◽  
Small Difference ◽  
Planting Date ◽  
Potato Cultivars ◽  
Plant Spacing ◽  
Planting Dates

Three sweet potato cultivars, `Beauregard', `Hernandez' and `Jewel' were transplanted at three different planting dates: June 4, June 21 and July 10, with harvest at 106, 109 and 117 days; respectively. Four in-row spacings of 22.9, 30.5, 38.1, and 45.7 cm on a 1 mm spacing between rows were used in each of the planting dates. The highest yields of U.S. No.1 grade potatoes in the cultivar `Beauregard' were produced at the 22.9 cm spacing in the first two planting dates and at 30.5 cm in the July 10 planting date. The highest yields of U.S. No.1 grade potatoes in the cultivar `Hernandez' were produced at 38.1 cm in all three planting dates. With the cultivar `Jewel' in the June 4 planting there was only a small difference in yield of U.S. No.1 potatoes at the 22.9, 30.5 and 38.1 cm spacings. In the June 21 and July 10 plantings the highest yields were produced at the 22.9 cm spacing. The 45.7 cm spacing produced the highest number of marketable roots per hill in all three cultivars.

Effect of planting time on the performance of broccoli under Mizoram conditions

2017 ◽  
Vol 17 (1) ◽  
pp. 15-18
Author(s):  
Donnie Lalfakzuala Kawlni ◽  
Chhungpuii Khawlhring
Keyword(s):  
Commercial Production ◽  
Plant Performance ◽  
Average Weight ◽  
Plant Spacing ◽  
Vegetable Crop ◽  
Marketable Yield ◽  
Sowing Time ◽  
Planting Time ◽  
Significant Difference ◽  
Cultural Requirements

Broccoli (Brassica oleracea var. italica), a popular vegetable crop, has one of the most exacting climatic and cultural requirements, which limit its commercial production to a few favored locations. A field experiment was conducted at Mizoram University, Tanhril, Mizoram during winter of 2013/2014 to find out the effect of time of sowing on plant performance and yield of broccoli. Six sowing time was done viz. 17 October (T1), 24 October (T2), 31 October (T3), 7 November (T4), 14 November (T5) and 21 November (T6) with plant spacing of 45cm x 45cm. Yield and yield contributing characters were significantly influenced by the planting time. Highest average weight of marketable curd per plant (199.20 g) was obtained from T2, whereas lowest average weight obtained from T6 (75 g). The influence of planting time also showed significant difference on the calculated yield (tonnes per hectare) of broccoli, in which T2 showed highest marketable yield of 9.83 t/ha.

THE SUCCESS OF THE LUCERNE MESSAGE IN MARLBOROUGH

1981 ◽  
pp. 179-183
Author(s):  
A.J. Cresswell
Keyword(s):  
North America ◽  
Weed Control ◽  
Seed Yield ◽  
Insect Pest ◽  
Fold Increase ◽  
Plant Spacing ◽  
Insect Pest Control ◽  
One Year ◽  
Seed Yields ◽  
New Cultivars

This paper, as well as being a testimonial to the benefit the writer has received from the Grassland Association, shows how the knowledge of scientists has been used to increase lucerne seed yields by methods of growing resistant cultivars especially for seed production as opposed to growing for hay, silage or grazing. It shows how new cultivars can be multiplied quickly by growing two crops in one year, one in each hemisphere, by using low seeding rates, wide plant spacing and very good weed control. Increased flowering of the crop has been achieved by the use of boron and the choice of time of closing; better pollination has been achieved by the use of more efficient bees - two varieties of which have been imported from North America. Weed and insect pest control and the use of a desiccant at harvest are contributing to a four-fold increase in seed yield, which should double again soon,

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