NITROGEN FERTILIZATION AND PETIOLE TISSUE TESTING IN PRODUCTION OF WHOLE SEED TUBERS OF THE POTATO CULTIVARS SEBAGO AND ATLANTIC

1988 ◽  
Vol 68 (3) ◽  
pp. 901-905 ◽  
Author(s):  
W. MacMURDO ◽  
R. K. PRANGE ◽  
R. VEINOT
Keyword(s):  
Solanum Tuberosum ◽  
Seed Tuber ◽  
Growing Season ◽  
Potato Production ◽  
Tuber Number ◽  
Optimum Amount ◽  
Seed Potato Production ◽  
Whole Seed ◽  
Nitrogen Treatments ◽  
Field Plots

Field plots of Atlantic and Sebago potatoes (Solanum tuberosum) grown for whole seed potato production received five nitrogen treatments at planting (kg N ha−1): 0, 33, 66, 99 and 132. Petiole NO3-N concentrations were determined every 3 wk during the growing season. Supplemental nitrogen (42 kg N ha−1) was applied to the 33, 66, and 99 kg N ha−1 plots when the petiole NO3-N dropped below 1.5%. Both cultivars were harvested 90 d after planting. At harvest, Sebago had more tablestock size (> 70 mm) tubers whereas Atlantic had more seed size (< 70 mm) tubers. The optimum amount of nitrogen applied at planting was between 99 and 132 kg N ha−1 for production of seed tuber number and weight, depending on the cultivar. The petiole NO3-N concentrations increased with the amount of N applied at planting and all N treatments showed declining concentrations during the growing season. In general, Sebago had higher NO3-N concentrations than Atlantic. Supplemental nitrogen application using 1.5% as the critical petiole NO3-N value slowed the decline in petiole NO3-N but did not demonstrate conclusively that it improved tuber number or weight. Critical petiole NO3-N concentrations for Atlantic and Sebago potatoes are proposed.Key words: Nitrogen, Solanum tuberosum, petiole testing, seed tuber, potato

PERSISTENCE OF CHLORFENVINPHOS IN SOIL AND ITS UPTAKE BY SOME CROPS

1975 ◽  
Vol 55 (2) ◽  
pp. 177-180
Author(s):  
D. CHISHOLM
Keyword(s):  
Solanum Tuberosum ◽  
Beta Vulgaris ◽  
Daucus Carota ◽  
Solanum Tuberosum L ◽  
Parent Compound ◽  
Growing Season ◽  
Pastinaca Sativa ◽  
Pesticide Application ◽  
Treated Soil ◽  
Field Plots

Chlorfenvinphos (diethyl 1-(2,4-dichlorophenyl)-2-chlorovinyl phosphate) applied broadcast to field plots at 5.6 kg/ha a.i. (56 kg/ha Birlane 10G) 4 days prior to seeding resulted in traces of the parent compound in beets (Beta vulgaris L.), potatoes (Solanum tuberosum L.), carrots (Daucus carota var. sativa DC.), parsnips (Pastinaca sativa L.), and rutabagas (Brassica napobrassica Mill.) at harvest. The α isomer was found in all crops except beets at ~ 0.01 ppm. The β isomer was found in all crops with carrots and parsnips containing 0.09 and 0.06 ppm, respectively. Chlorfenvinphos residue concentrations in treated soil declined ~ 73% during the 23-wk growing season following pesticide application, but trace residues were detected in the soil 4 yr after application.

scholarly journals Effect of dehaulming on yield of seed potatoes

1970 ◽  
Vol 34 (3) ◽  
pp. 443-448
Author(s):  
AA Mahmud ◽  
Sajeda Akhter ◽  
MJ Hossain ◽  
MKR Bhuiyan ◽  
MA Hoque
Keyword(s):  
Key Words ◽  
Seed Production ◽  
Seed Potato ◽  
Seed Size ◽  
Tuber Yield ◽  
Seed Tuber ◽  
Potato Production ◽  
Potato Seed ◽  
Seed Potato Production ◽  
Seed Potatoes

The yield of seed size tubers was assessed in five standard potato cultivars (Cardinal, Multa, Ailsa, Heera, and Dheera) in relation to dates of dehaulming (65, 70, and 80 days after planting) in a Seed Potato Production Farm, Debijong, Panchagarh during 1996-97 and 1997-98. Dehaulming at 70 days gave maximum seed size tubers (19.75 t/ha ≈ 76%) but significantly identical to 75 days (19.56 t/ha ≈70%) and 80 days (18.69 t/ha ≈ 63%). Considering all the parameters studied, the performance of Heera proved to be best among the cultivars grown. Among the cultivars, the maximum seed tuber yield was recorded from Cardinal at 80 DAP followed by Heera and Cardinal at 70 DAP, Dheera and Ailsa at 75 DAP. In general, most of the cultivars gave the maximum seed tuber yield when the crop was dehaulmed at 70 and 80 DAP and the lowest from 65 DAP. Key Words: Dehaulming, potato, seed production. DOI: 10.3329/bjar.v34i3.3970 Bangladesh J. Agril. Res. 34(3) : 443-448, September 2009

DECENTRALIZED ON-FARM SEED POTATO PRODUCTION FROM PRE-BASIC MINITUBERS: A CASE STUDY FROM NEPAL

1998 ◽  
Vol 34 (4) ◽  
pp. 487-495 ◽  
Author(s):  
S. SCHULZ ◽  
G. J. WELLS ◽  
B. K. BANIYA ◽  
T. P. BARAKOTI ◽  
G. KHAREL ◽  
...  
Keyword(s):  
Solanum Tuberosum ◽  
Seed Potato ◽  
Potato Production ◽  
Small Scale ◽  
Seed Potato Production ◽  
Southern Plains ◽  
Small Scale Farmers ◽  
On Farm ◽  
Basic Seed

The on-farm performance of more than 150 000 pre-basic potato (Solanum tuberosum) minitubers of 1–10 g was monitored over two years in contrasting environments in Nepal. Average minituber productivity (grams of basic seed produced per minituber planted) was 171 g in the southern plains and 116 g in the hills. Although the performance of minitubers varied between environments, minituber sizes and potato varieties, the overall results clearly indicated that minitubers can be successfully multiplied by small-scale farmers. This technology therefore allows for the highly decentralized production of basic seed which, in turn, will reduce farmers' dependence on an unreliable and costly supply of bulky conventional seed.

Technical Efficiency in Seed Potato Production Systems in Uganda

2018 ◽  
Vol 10 (3(J)) ◽  
pp. 122-140
Author(s):  
Ambrose Rwaheru Aheisibwe ◽  
Razack B. Lokina ◽  
Aloyce S. Hepelwa
Keyword(s):  
Technical Efficiency ◽  
Seed Potato ◽  
Arable Land ◽  
Stochastic Frontier ◽  
Potato Production ◽  
Maximum Likelihood Estimates ◽  
Farm Income ◽  
Seed Potato Production ◽  
Extension Services ◽  
Income Source

This study established the level of technical efficiency and its determinants among the informal and formal seed potato producers in the southwestern highlands agro - ecological zone of Uganda. A multi- stage sampling procedure was employed to select 636 households (499 informal seed producers and 137 formal seed producers) from which data was collected for two seasons using a semi - structured questionnaire. Data was analyzed using the stochastic frontier approach with a one - step approach. Maximum likelihood estimates for the efficiency parameters showed that both informal and formal seed potato producers were not fully efficient. The mean technical efficiency for informal and formal seed potato producers was 8 1 .4 and 80.4 percent respectively. In terms of yield loss, informal and formal seed potato producers respectively lost an average of 981 and 1,208 kg/acre of seed potato tubers due to inefficiency factors . Specifically, off- farm income source, scale of production, seasonal variation, access to extension services and seed producer being male positively influenced informal seed producers’ technical efficiency while producers’ level of education and seed potato variety diversity negatively influenced their efficiency. For formal seed producers, technical efficiency was influenced positively by producers’ education and negatively by household size. The study suggests that there is an opportunity to improve technical efficiency of informal and formal seed producers by 19 and 20 percent respectively. Therefore, this calls for increased investment in developing and promoting high yielding varieties, provision of extension services, input intensification and addressing gender issues in seed potato production in the context of limited arable land .

ROOT-SURFACE MYCOFLORA OF SOYBEAN IN RELATION TO SOIL TEMPERATURE AND MOISTURE IN A FIELD ENVIRONMENT

1972 ◽  
Vol 52 (2) ◽  
pp. 199-208 ◽  
Author(s):  
K. C. IVARSON ◽  
A. R. MACK
Keyword(s):  
Soil Temperature ◽  
Relative Frequency ◽  
Incubation Temperature ◽  
Growing Season ◽  
Root Surface ◽  
Growing Seasons ◽  
Field Environment ◽  
Abundant Genus ◽  
Field Plots ◽  
Soil Temperature And Moisture

Studies were made on the root-surface fungi of soybean grown in field plots where various soil temperature and moisture environments had been maintained for five previous growing seasons. Washed-root segments were incubated on agar plates at temperatures corresponding to those of the field plots. Fusarium was the most abundant genus appearing on the plates. Species of Mucor, Trichoderma, Alternaria, Mortierella, Aspergillus, Corynespora, Rhizoctonia, Penicillium, Gliocladium, and sterile forms appeared fairly frequently. Statistical analysis of the data revealed that changes in soil and incubation temperature markedly affected the relative frequency of 12 genera, and age of plant significantly affected nine genera. Soil moisture influenced the frequency of only one genus. High soil and incubation temperature (28 C) encouraged greater root populations of Rhizoctonia early in the season, Trichoderma and Aspergillus throughout the growing season, and Fusarium late in the season. Low soil temperature conditions (12 C) favored growth of Pythium, Mortierella, Mucor, Alternaria, Cladosporium, throughout the growing season, and Corynespora and Cylindrocarpon, primarily during mid-season. Late in the season Gliocladium preferred the intermediate temperature of 20 C.

Suitability of a Cool Maritime Climate for Seed Potato Production

Nature ◽  
1944 ◽  
Vol 154 (3916) ◽  
pp. 644-645 ◽  
Author(s):  
J. E. VAN DER PLANK
Keyword(s):  
Seed Potato ◽  
Potato Production ◽  
Seed Potato Production ◽  
Maritime Climate

Yield and Yield Contributing Attributes Of Potato as Influenced by Vermicompost And Seed Tuber Size

2021 ◽  
Vol 19 (1) ◽  
pp. 71-79
Author(s):  
M Mostofa ◽  
TS Roy ◽  
R Chakraborty
Keyword(s):  
Seed Tuber ◽  
Maximum Yield ◽  
Potato Production ◽  
Tuber Size ◽  
Factor B ◽  
Yield Parameters ◽  
Study Results ◽  
Split Plot ◽  
Two Factors ◽  
Plot Design

Low yield is crucial bottleneck for potato production in Bangladesh. The application of vermicompost may enhance the yield of potato. The experiment was consisted of two factors, i.e., Factor A: - Vermicompost level (Vm1-4): Vm1: 0 t ha-1, Vm2: 3 t ha-1, Vm3: 6 t ha-1 and Vm4: 9 t ha-1; Factor B:- Tuber size (T1-5): T1: 5-10 g, T2: 10-20 g, T3: 20-30 g, T4: 30-40 g and T5: > 40 g. The experiment was conducted in a split-plot design with three replications. Vermicompost had significant effect on most of the yield contributing parameters investigated under present study. Results revealed that yield parameters increased with increasing vermicompost level irrespective of tuber size. Among the twenty (20) treatment combinations, vermicompost at the rate of 9 t ha-1 with tuber size > 40 g produced the maximum yield (31.33 t ha-1) that was 53.53 % higher than that of control with 3273.01 $ of monetary advantage. Therefore, present study suggests that potato growers may use vermicompost for increasing yield of potato in Bangladesh. SAARC J. Agric., 19(1): 71-79 (2021)

Sign in / Sign up

Export Citation Format

Share Document