NITROGEN, POTASSIUM, AND PLANT SPACING EFFECTS ON YIELD, TUBER SIZE, SPECIFIC GRAVITY, AND TISSUE N, P, AND K OF NETTED GEM POTATOES

1974 ◽  
Vol 54 (3) ◽  
pp. 535-539 ◽  
Author(s):  
R P. WHITE ◽  
D. C. MUNRO ◽  
J. B. SANDERSON
Keyword(s):  
Specific Gravity ◽  
Seed Piece ◽  
Total Yield ◽  
Tuber Size ◽  
Solarium Tuberosum ◽  
Plant Spacing ◽  
Nutrient Levels ◽  
Spacing Effects ◽  
N Rates

Netted Gem potatoes (Solarium tuberosum L.) were grown at seed-piece spacings of 28, 38, and 46 cm with 90, 134, and 179 kg N/ha and 46, 93, and 139 kg K/ha. Prior to planting, 100 kg P/ha and 56 kg Mg/ha were broadcast. At planting 74 kg P/ha was combined with the N and K treatments and banded. Increased spacing resulted in increased yields of "A" size tubers (113–454 g) and the percentage of A size tubers in the total yield, whereas total yield was unaffected as spacing increased. Increased rates of N and K resulted in increased total yields and percentage of A size tubers. Specific gravity decreased slightly as N rates increased, but decreased markedly (from 1.099 to 1.091) as K increased. Spacing had no effect on specific gravity. Applied N and K had significant effects on leaf and petiole N, P, and K levels. Increased spacing had no effect on tissue nutrient levels.

Competition between Potatoes (Solarium tuberosum) and Weeds

Weed Science ◽  
1981 ◽  
Vol 29 (6) ◽  
pp. 672-677 ◽  
Author(s):  
D. C. Nelson ◽  
Myron C. Thoreson
Keyword(s):  
Solanum Tuberosum ◽  
Specific Gravity ◽  
Deleterious Effect ◽  
Tuber Yield ◽  
Tuber Size ◽  
Solarium Tuberosum ◽  
Weed Competition ◽  
Dry Biomass ◽  
Potato Yields ◽  
Annual Weeds

Mixtures of annual weeds emerging 1 week after and competing all season with potatoes (Solanum tuberosumL.) reduced tuber yields by an average of 54% compared to 16% in comparable treatments in which weeds emerged 3 weeks after potatoes. Weeds reduced tuber yields 19% 8 weeks after potatoes emerged and 25 to 45% 10 weeks after emergence. After full-season competition, for each additional 10% of the total dry biomass represented by weeds, there was a decrease of 12% in fresh tuber yield. This relationship was not valid if potatoes were harvested early, which reduced the deleterious effect of weeds on potato yields. Weed competition reduced both size and number of tubers, but had little effect on specific gravity of tubers. In some instances, the reduction in tuber size by weeds reduced the percentage of tubers that were marketable.

Influence of irrigation, nitrogen and seed piece spacing on yields and tuber size distribution of seed potatoes

1997 ◽  
Vol 77 (1) ◽  
pp. 141-148 ◽  
Author(s):  
Doug Waterer
Keyword(s):  
Size Distribution ◽  
Seed Piece ◽  
Total Yield ◽  
Tuber Size ◽  
Russet Burbank ◽  
Row Spacing ◽  
Total N ◽  
Tuber Size Distribution ◽  
Seed Spacing ◽  
Yield Responses

This study examined the influence of irrigation, soil nitrogen (N) levels and seed piece spacing on the yields and tuber size distribution of Norland, Russet Burbank and Shepody potatoes over three seasons at two sites in central Saskatchewan. The crops were grown under standard irrigated conditions or on dryland with in-row spacings of 15, 23 or 30 cm and total N levels of 200 or 300 kg ha−1 as either preplant or split applications. Irrigation greatly enhanced yields of all tuber size categories in the drier years but had less effect if seasonal precipitation reached or exceeded normal levels. Smaller size tubers formed a greater proportion of the total yield in crops exposed to drought stress. Norland was less affected by drought than the later-maturing cultivars. Yield responses to N were limited to situations where soil moisture was abundant or crop demand for nutrients was increased by close in-row spacings. Close in-row spacing increased total yields in some cases, while in others it resulted in a reduction in tuber size with little effect on overall yields. Yields for the cultivar Norland were less affected by seed piece spacing than yields for Russet Burbank or Shepody. Key words: Solanum tuberosum, drop seed, spacing, fertility

scholarly journals Plant density and nitrogen fertilization in Swiss chard

2012 ◽  
Vol 30 (4) ◽  
pp. 703-707 ◽  
Author(s):  
Márcia de M Echer ◽  
Tiago Zoz ◽  
Charles Douglas Rossol ◽  
Fábio Steiner ◽  
Deise D Castagnara ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
Plant Density ◽  
Total Yield ◽  
Plant Spacing ◽  
Fresh Weight ◽  
Marketable Yield ◽  
N Accumulation ◽  
Swiss Chard ◽  
N Rates ◽  
Total Fresh Weight

An experiment was conducted to evaluate the effect of plant spacing and nitrogen fertilization on Swiss chard's yield, from September to November 2009. The experimental design was of randomized blocks in split plot with four replications. In the plots were allocated the two plant spacings (0.30 and 0.50 m) and in the subplots the five doses of nitrogen (0, 40, 80, 120 and 160 kg ha-1). The crop was harvested 90 days after transplanting. The plant spacing of 0.50 m provided increased production of total fresh weight of shoot (961.7 g plant-1) and marketable (873.1 g plant-1). However, the highest total yield (77.8 t ha-1) and marketable (64.5 t ha-1) was achieved with the smaller spacing between plants (0.30 m). The N rates applied in coverage until 160 kg ha-1 increased in a linear form the total and marketable production of fresh mass of shoots, the total and marketable yield, the N content and the N accumulation in the shoots of Swiss chard plants on the evaluated plant spacings.

Response of Potato (Solarium tuberosum) Cultivars to Metribuzin

Weed Science ◽  
1984 ◽  
Vol 32 (4) ◽  
pp. 442-444 ◽  
Author(s):  
George H. Friesen ◽  
David A. Wall
Keyword(s):  
Solanum Tuberosum ◽  
Specific Gravity ◽  
Field Experiments ◽  
Hollow Heart ◽  
Tuber Size ◽  
Potato Cultivars ◽  
Solarium Tuberosum ◽  
Susceptible Cultivar

The response of 22 potato (Solanum tuberosumL.) cultivars to soil-incorporated and foliar applications of metribuzin [4-amino-6-tert-butyl-3-(methylthio)-as-triazin-5(4H)one] at rates of 0.5 and 1.0 kg ai/ha, was evaluated in field experiments from 1979 to 1982. Metribuzin significantly reduced the yield of marketable tubers in several potato cultivars. Foliar applications generally resulted in more injury than soil applications. Yields were reduced primarily through stand reduction and a decreased number of tubers per plant. Neither tuber size nor specific gravity of tubers was significantly reduced in the cultivars studied. The most susceptible cultivar was ‘Alaska Red’, followed by ‘Rhine Red’, F72117, ‘Caribe’, and ‘Shepody’. Other cultivars evaluated were highly tolerant to metribuzin, irrespective of rate or method of application. There was an increase in hollow heart in cultivars ‘Atlantic’ and ‘Lemhi Russet’ following treatment with metribuzin.

KARAKTERISASI SIFAT FISIKA DAN KIMIA CUKA KAYU DARI TANDAN KOSONG KELAPA SAWIT

2014 ◽  
Vol 6 (1) ◽  
pp. 35 ◽  
Author(s):  
Rizka Karima
Keyword(s):  
Specific Gravity ◽  
Physical Properties ◽  
Solid Waste ◽  
Ph Value ◽  
Total Yield ◽  
Chemical Properties ◽  
Phenol Content ◽  
Empty Fruit Bunches ◽  
Wood Vinegar ◽  
And Chemical Properties

There’s so many pal solid waste or palm empty fruit bunches, but the utilization is not maximized, this research its to optimized utilization of palm solid waste to be wood vinegar and want to know the composition physical properties and chemical properties of wood vinegar from palm empty fruit bunches. Total yield of wood vinegar from palm empty fruit bunches its 15,94 % and total yield of charcoal its 64,58 %. GCMS result showing chemical properties from wood vinegar of burning < 100oC its obtained 19 compound and burning >100 oC its obtained 6 compound. The result physichal properties testing from crued wood vinegar its obtained specific gravity 1,0005 and 1,0010, pH value are 3,233 and 3,186, TAT content are 9,36 % and 11,12 %, phenol content its 0,44 %. The result physical properties testing from wood vinegar which has decolorizatin by activated carbon its obtained specific gravity are 0,9987 and 0,999, pH value are 3,036 and 3,012, TAT content are 8,29 % and 9,27 % and phenol content its 0,01 %.Keywords: palm bunches, wood vinegar, liquid smoke

The effects of the growth-regulating compounds methyl decanoate and 2, 3, 5-triiodobenzoic acid on potato tuber size

1976 ◽  
Vol 86 (2) ◽  
pp. 251-255
Author(s):  
D. C. E. Wurr
Keyword(s):  
Potato Tuber ◽  
Size Distribution ◽  
Tuber Yield ◽  
Potato Crop ◽  
Total Yield ◽  
Tuber Size ◽  
Tuber Initiation ◽  
Triiodobenzoic Acid ◽  
Tuber Size Distribution ◽  
Methyl Decanoate

SummaryApplication of methyl decanoate to a potato crop about the time of tuber initiation reduced the total yield and the yield of tubers in the grade 2·5–5·5 cm though neither of these reductions were significant. However, application of 2,3,5-triiodobenzoic acid increased the yield of tubers 2·5–5·5 cm by up to 20% while having no significant effect on total tuber yield. This change in the tuber size distribution was due to a more even partition of photosynthate between tubers and not to an increase in the total number of tubers.

scholarly journals Seed Piece Spacing for Spring Chipping Potato Cultivars in Florida

HortScience ◽  
2017 ◽  
Vol 52 (2) ◽  
pp. 230-235
Author(s):  
Fernanda Souza Krupek ◽  
Christian T. Christensen ◽  
Charles E. Barrett ◽  
Lincoln Zotarelli
Keyword(s):  
Specific Gravity ◽  
Seed Piece ◽  
Production Cost ◽  
Block Design ◽  
Potato Cultivars ◽  
Row Spacing ◽  
Marketable Yield ◽  
Industry Standard ◽  
Significant Difference ◽  
Chipping Potato

The cost of seed accounts for nearly 10% of the estimated production cost of chipping potato (Solanum tuberosum) production in Florida. Optimizing seed piece spacing can reduce costs without affecting potato yield. This study evaluated the effects of seed piece spacing on yield, quality, and economic revenue of chipping potato production in north Florida. A field experiment was conduct during the spring of 2013, 2014, and 2016 in Hastings, FL, with a split-plot randomized complete block design. In-row seed piece spacings of 10, 15, 20 (industry standard), 25, and 30 cm were assigned as the main plot and S. tuberosum potato cultivars (Atlantic, Harley Blackwell, and Elkton) as the subplots. Marketable tuber yield ranged between 10.8 and 15.2 Mg·ha−1 in 2013, 10.1 and 12.8 Mg·ha−1 in 2014, and 9.9 and 19.7 Mg·ha−1 in 2016. Overall lower yields in 2013 were due to three freeze events early in the season. Widening seed piece spacing resulted in a linear decrease in total and marketable yield in 2013 and 2014. Conversely, seed piece spacings of 10 and 15 cm showed lower marketable yields in 2016. There was no interaction between in-row spacing and cultivar in any year tested. Cultivars performed variably across years for total and marketable yield and specific gravity. Tuber specific gravity was unaffected by seed piece spacing, except in 2013, when 25 and 30 cm resulted in slightly higher values. There was no significant difference in total and marketable yield between the industry standard seed piece spacing 20 and 25 cm in any year. In-row spacing of 25 cm in 2013 and 30 cm seed piece spacing in 2014 and 2016 provided the greatest economic return. Net revenue can be increased by adjusting the in-row seed piece spacing from the commercial standard of 20 to 25 cm, which reduces production cost without negatively impacting yields.

Plant Spacing Effects on Growth, Yield and Lint of Cotton

2007 ◽  
Vol 6 (2) ◽  
pp. 415-418 ◽  
Author(s):  
M.H. Siddiqui ◽  
F.C. Oad ◽  
U.A. Buriro
Keyword(s):  
Growth Yield ◽  
Plant Spacing ◽  
Spacing Effects

Potato response to crop sequence and nitrogen fertilization following sod breakup in a Gleyed Humo-Ferric Podzol

1999 ◽  
Vol 79 (3) ◽  
pp. 439-446 ◽  
Author(s):  
H. Li ◽  
L. É. Parent ◽  
C. Tremblay ◽  
A. Karam
Keyword(s):  
Solanum Tuberosum ◽  
Crop Rotation ◽  
Common Scab ◽  
Solanum Tuberosum L ◽  
Total Yield ◽  
Tuber Quality ◽  
Continuous Cropping ◽  
Mineral N ◽  
Silty Loam ◽  
N Rates

Meadow soils could supply significant amounts of N for several years and reduce N requirements for the potato (Solanum tuberosum L.). We examined a combination of three crop sequences, three cultivars and six N rates in relation to tuber yield and quality. Superior, Kennebec and Snowden were grown as follows on a Tilly silty loam between 1993 and 1995: (1) 3-yr continuous potato cropping of Superior, (2) 3-yr continuous potato cropping starting with Snowden and followed by 2 yr of Kennebec, and (3) 3-yr sequence of Kennebec, oat (Avena sativa L. 'Marion') and Superior. There were six N treatments (0, 70, 105, 140, 175 and 210 kg N ha−1) and a split application of 140 kg N ha−1 (half at seeding and half before hilling). The seasons were either favorable to growth (1993), relatively wet (1994) or relatively dry (1995). In 1993 and 1994, total yield varied between 37 and 50 t ha−1. In 1995, continuous cropping of Kennebec and Superior produced 28 t ha−1 compared with 37 t ha−1 under crop rotation. The rotation increased total yield of Superior by 34% and graded yield by 42% in 1995. The N requirement was closely related to yield, rather than cultivar. Compared with continuous cropping of Superior, tuber-quality index was highest with the rotation for rhizoctonia (Rhizoctonia solani) (67 vs. 57) and common scab (Streptomyces scabies) (90 vs. 82). The incidence of both diseases decreased when at least 70 kg N ha−1 was applied. For common scab, skin coverages was higher at rates of 0, 175 and 210 kg N ha−1 than at intermediate rates of 70–140 kg N ha−1. Mineral N accumulated in the 0–60-cm layer in the interrow and increased rapidly when N rates exceeded 105 kg N ha−1. After sod breakup an N rate in the range of 70–100 kg N ha−1 and crop rotation with cereals sustained the productivity of the potato during 3 yr while minimizing the environmental impact of mineral N. Key words: Crop rotation, common scab, rhizoctonia, reduced N rates, Solanum tuberosum L.

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
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