scholarly journals Potato (Solanum tuberosum L.) Tuber Yield and Yield Components as Influenced by Different Levels of Nitrogen, Phosphorus and Potassium in Rwanda

2019 ◽  
Vol 39 (03) ◽  
Author(s):  
Adrien Turamyenyirijuru ◽  
Guillaume Nyagatare ◽  
Robert Morwani Gesimba ◽  
Rhoda Jerop Birech
Keyword(s):  
Yield Components ◽  
Field Experiments ◽  
Tuber Yield ◽  
Solanum Tuberosum L ◽  
Block Design ◽  
Yield Potential ◽  
Ecological Zones ◽  
Growing Seasons ◽  
Yield And Yield Components ◽  
Phosphorus And Potassium

Despite potato yield potential, its intensification level remain low in Rwanda, translating into low yield occasioned mainly by the decline in soil fertility. Field experiments were conducted in Birunga, Mudende [L1]) and Buberuka, Rwerere [L2] highlands Agro-Ecological Zones (AEZs), during September- December 2016 and March-June 2017 crop growing seasons to determine the effects of varying rates of N, P and K on potato tuber yield and yield components. The experiments were laid out using randomized complete block design with factorial arrangement, with four replicates. Factors were N rates (NX) i.e N1-0 kg ha-1, N2 – 50 kg ha-1, N3 – 100 kg ha-1 ; P2O5 rates (PX) i.e P1-0 kg ha-1, P2 – 50 kg ha-1, P3 – 100 kg ha-1and K2O rates (Kx) i.e K1- 0 kg ha1and K2- 50 kg ha-1. Number of tubers per plant, fresh tuber weight, small tuber yield, medium tuber yield, large tuber yield and total tuber yield were measured. Analysis of variance, performed using SAS-version 9.2, revealed that interaction effects of N×P×K were very highly significant on all parameters. Generally, N3×P3×K2 performed better than other treatments and recorded highest tuber yields in all situations: (32.73 ± 0.43) t ha-1[L1] and (29.36 ± 0.41) t ha-1 [L2] and (31.05 ± 0.52) t ha-1for pooled ANOVA. Contrarily to what happened at L2, N3P3K2 andN2P3K2 were not significantly different at L1. N2P3 K2 is recommended to L1 whereas N3P3K2 is recommended to L2.

scholarly journals Penampilan Fenotipik Karakter Hasil Galur Harapan Padi Rawa di Lahan Pasang Surut Karang Agung, Sumatera Selatan

2016 ◽  
Vol 17 (1) ◽  
pp. 19
Author(s):  
Rini Hermanasari ◽  
NFN Supartopo ◽  
B. Kustianto
Keyword(s):  
Plant Height ◽  
Yield Components ◽  
Rice Field ◽  
Block Design ◽  
Yield Component ◽  
Yield Potential ◽  
Lower Yield ◽  
Tidal Swamp ◽  
Randomized Complete Block Design ◽  
Yield And Yield Components

<p>Phenotypic Performance of Yield and Yield Component of Rice Promising Lines at Tidal Swamp Area in Karang Agung, South Sumatra. An experiment was conducted in Karang Agung, in April until September 2007. The experiment aimed at evaluating phenotypic performance of yield and yield components of promising lines in tidal swamp rice field. The experiment was arranged in a Randomized Complete Block Design with 16 treatments and four replications. The promising lines tested were B9858-KA-55, B9833C-KA-14, B9852E-KA-66, B5524G-SM-61-2-1, B7003D-MR-24-3-1, KAL9414F-MR-2-KN-0, KAL9418F-MR-2-KN-0, B10214FTB- 7-2-3, IR70213-9-CPA-12-UBN-2-1-3-1, IR70215-2- CPA-2-1-B-1-2. The check varieties used were IR42, Batanghari and Lembu Sawah. The results of this experiment showed that IR61242-3B-B-2 had better performance among varieties and promising lines tested, as well as giving the highest yield potential. Meanwhile, the line B10214F-TB-7-2- 3 had better performance of number of filled grain, and 1.000 grain weight. It also showed higher yield potential compared to IR42 and Batanghari. The line KAL9418F-MR-2-KN-0 had better performance of plant height, 1.000 weight grain and harvest age, but showed lower yield potential compared to those other check varieties.</p><p> </p><p><strong>Abstrak</strong></p><p>Percobaan dilaksanakan di KP Karang Agung, Sumatera Selatan pada bulan April sampai September 2007. Penelitian bertujuan untuk mendapatkan informasi tentang penampilan fenotipik karakter hasil dan komponen hasil dari galur-galur harapan padi rawa di lahan pasang surut Karang Agung. Percobaan ditata dalam rancangan acak kelompok dengan 16 perlakuan dan empat ulangan. Galur-galur yang diuji di antaranya B9858-KA-55, B9833C-KA-14, B9852E-KA-66, B5524GSM- 61-2-1, B7003D-MR-24-3-1, KAL9414F-MR-2-KN-0, KAL9418F-MR-2-KN-0, B10214F-TB-7-2-3, IR70213-9- CPA-12-UBN-2-1-3-1, dan IR70215-2-CPA-2-1-B-1-2. Varietas pembanding digunakan IR42, Batanghari, dan Lembu Sawah. Hasil penelitian menunjukkan bahwa galur IR61242- 3B-B-2 memiliki penampilan lebih baik dari varietas pembanding untuk karakter tinggi tanaman, jumlah gabah isi, bobot 1.000 butir gabah, dan potensi hasil. Galur B10214F-TB-7-2-3 memberikan penampilan lebih baik untuk karakter jumlah gabah isi, bobot 1.000 butir, dan potensi hasil lebih tinggi daripada pembanding IR42 dan Batanghari. Galur KAL9418F-MR- 2-KN-0 memiliki penampilan lebih baik untuk karakter bobot 1.000 butir, tinggi tanaman, dan umur panen, tetapi potensi hasilnya lebih rendah dari ketiga varietas pembanding.</p>

CROP-WEED COMPETITION STUDIES IN FABA BEAN (Vicia faba L.) UNDER RAINFED CONDITIONS

2001 ◽  
Vol 49 (3) ◽  
pp. 299-303 ◽  
Author(s):  
A. M. Tawaha ◽  
M. A. Turk
Keyword(s):  
Vicia Faba ◽  
Faba Bean ◽  
Yield Components ◽  
Field Experiments ◽  
Maximum Yield ◽  
Weed Competition ◽  
Growing Seasons ◽  
Yield And Yield Components ◽  
Vicia Faba L ◽  
Crop Weed Competition

Field experiments were conducted during the two growing seasons of 1999 and 2000 at the research farm of the Jordan University of Science and Technology (JUST) to study the effect of the time of weed removal on the yield and yield components of faba bean (Vicia faba L.). Removing weeds from 25 to 75 days after crop sowing led to significantly larger yields than on plots which were not weeded. Maximum yield was obtained in both years when weeds were removed thrice at 25, 50 and 75 days after crop sowing.

scholarly journals Preliminary Evaluation of Different Combinations of Inorganic and Humate Based Fertilizer on Yield of Potato (Solanum tuberosum L.) in Malawi

2020 ◽  
pp. 25-33
Author(s):  
Kennedy Masamba ◽  
Austin T. Phiri ◽  
Obed Mwenye ◽  
Margaret Chiipanthenga ◽  
Felix Chipojola ◽  
...  
Keyword(s):  
Yield Components ◽  
Tuber Yield ◽  
Crop Yields ◽  
Block Design ◽  
Mineral Fertilizer ◽  
Potato Yield ◽  
Preliminary Evaluation ◽  
Combined Application ◽  
Significant Difference ◽  
Yield And Yield Components

In Malawi the demand of the use of mineral acidifying fertilizer by farmers for sustenance of high crop yields is increasing. The soaring demand is a pointer to the loss of humic substances in the soil and the resultant poor soil health. There is potential however to reduce the amount of mineral fertilizer used by the farmers and retain the applied nutrients within the plants rooting zone for increased use efficiency and productivity. This could be achieved through the combined application of humate based fertilizers with mineral fertilizer. Therefore, an experiment was conducted to evaluate the effect of different rates of NPK and humate based fertilizer (HBF) combinations on potato yield and yield components at Tsangano, Bembeke and Dwale Extension Planning Area (EPA) in the 2016/2017 cropping season. Ten treatments were laid out in a randomized complete block design (RCBD). Baseline soil data were collected and subjected to standard laboratory analytical procedure. Agronomic data collected in the experiment were analyzed in Genstat Discovery Edition 4 and were subjected to analysis of variance (ANOVA) at 95% level of confidence. The means were separated by the least significant difference (LSD0.05). Laboratory analysis showed that soils were strongly acid at the three sites with low amount of N, P, K except for Dwale EPA which had high P and medium content of K. Furthermore, results showed that different NPK and HBF combination significantly influenced potato tuber yield and yield components at the three sites. The recommended fertilizer rate of NPK 8:18:15 + 6S at 250 kg ha-1 + 60 kg N ha-1 produced the highest tuber yield at Tsangano (20,729 kg ha-1) and Bembeke (5,189 kg ha-1). At Dwale EPA, application of NPK 8:18:15 + 6S at 250 kg ha-1 produced the highest yield (13,956 kg ha-1). Nevertheless, different combinations of NPK and HBF fertilizer (Treatments 7, 8, 9 and 10) also gave comparably high yields and high number of big tubers. Therefore, the combined application of mineral fertilizer and humate based fertilizer potentially could increase potato yield in Malawi, sustainably. More studies however are required in order to confirm the results.

RESPONSE OF SOYBEAN TO LOWER-CANOPY DEFOLIATION DURING SEEDFILL

1989 ◽  
Vol 69 (1) ◽  
pp. 17-22 ◽  
Author(s):  
B. L. VASILAS ◽  
J. FUHRMANN ◽  
L. E. GRAY
Keyword(s):  
Yield Components ◽  
Field Experiments ◽  
Total Yield ◽  
Brown Spot ◽  
Yield Losses ◽  
Growing Seasons ◽  
Naturally Occurring ◽  
Yield And Yield Components ◽  
Yield Responses ◽  
Pod Number

One of the effects of Septoria brown spot on soybean is accelerated lower-canopy defoliation. Field experiments were conducted in 1986 and 1987 to determine the response of soybean yield and yield components to progressive lower-canopy defoliation during seedfill. Soybean cultivar Williams 82 was machine planted in rows 76 cm wide and hand thinned to a uniform stand of 23 plants m−1. Three treatments were used: controls; defoliated, starting at R5 (beginning seed stage; DEF1), and defoliated, starting 7 d past R5 (DEF2). Defoliation treatments were applied by removing the leaflets and petioles from the lowest three or four leaf-bearing nodes four times at 4-d intervals so that only three or four nodes at the top of the plant remained leaf-bearing when defoliation ceased. Yield and yield components were determined for upper, lower and total nodes. Although the two growing seasons were very different, yield responses to defoliation were similar in both years. On the average, DEF1 reduced seed yield by 18% which is similar to losses that occur when brown spot is induced by inoculation; DEF2 reduced yields by 9% which is similar to yield losses reported for naturally occurring brown spot. Yields of DEF2 exceeded yields of DEF1 because of differences in pod number in 1986 and seeds/pod in 1987. Controls out-yielded DEF2 because of differences in seeds/pod in 1986 and seed size in 1987. The proportion of the total yield contributed by pods found on the upper nodes averaged 76% and was not affected by defoliation.Key words: Glycine max, Septoria glycines, brown spot, leaf loss

scholarly journals Potentiality of Some Egyptan Cotton Varieties under Drought Stress Conditions

2019 ◽  
pp. 1-7
Author(s):  
M. D. H. Dewdar
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Yield Components ◽  
Block Design ◽  
Stress Conditions ◽  
Yield Potential ◽  
High Yield ◽  
Stress Treatment ◽  
Irrigation Regimes ◽  
Yield And Yield Components

This study aimed to investigate the performance of three cotton (Gossypium barbadense L.) genotypes as affected by drought stress at three irrigation regimes; 14 (S-0), 21(S-1) and 28 (S-2) days that were started after the first irrigation. To achieve this goal, a field experiment was conducted as split block design at the Experimental Farm of the Faculty of Agriculture, El-Fayoum Univ. The results indicated that the irrigation regimes mean squares of combined data were highly significant for earliness traits, also as well as yield and yield components.  Most of fiber properties were not affected by water stress conditions. Significant differences were found among the non- stress (S-0) and the stress treatments (S-1 and S-2) for mean performances of the three earliness traits. Treatment S-2 led to significant decrease in yield and yield components compared to S-0. The results showed that Giza 85 variety gave the highest fiber length, fiber strength and was finer cultivars having the lower micronaire values. The interaction between genotypes and stress treatments was significant for most traits.G1,G2 and G3 cotton varieties  exhibited highest seed cotton yield kg ha-1 (yield potential) in the non- stress treatment (S-0).  Giza 90 variety outyielded the other two varieties under stress treatment (S-2) compared to those of Giza 85 and Giza 83. The superiority of Giza 90 variety could be attributed to its high yield components., while Giza 90 was relatively stress susceptible and similar trend of those obtained using data of relative productivity (%) which confirm that the genotype Giza 83 and Giza 85 are more drought tolerance and could be used as sources of drought stress tolerance in breeding programs and tolerance to water stress conditions.

scholarly journals Yield and yield component performance of soybean promising line in upland during the rainy season

2021 ◽  
Vol 911 (1) ◽  
pp. 012021
Author(s):  
MM Adie ◽  
A Krisnawati
Keyword(s):  
Rainy Season ◽  
Yield Components ◽  
Field Experiments ◽  
Block Design ◽  
Yield Component ◽  
High Yield ◽  
Dry Land ◽  
Yield And Yield Components ◽  
Promising Line ◽  
Number Of Branches

Abstract Soybean development in dry land during the rainy season not only contributes to soybean production but also has the potential to be a source of seeds. The research aimed to identify the yield and yield component performance of soybean promising line at upland in the rainy season. A total of fourteen soybean promising lines and two check cultivars were evaluated for their yield and yield components in Blitar and Malang. The field experiments were conducted in each location during the rainy season 2021 using a randomized block design with four replicates. A significant GEI was found on the plant height, number of branches/plant, number of nodes/plant, number of filled pods/plant, and 100 seed weight. The Blitar location indicated resulting in the optimum yield and yield components of the tested promising lines. The average yield in Blitar was 2.81 t/ha (an average of 2.07 – 3.60 t/ha) and in Malang was 2.16 t/ha (an average of 1.52 – 3.18 t/ha). The number of branches and number of nodes has significant roles in determining the seed yield in soybean. Two genotypes with consistently high yield in Blitar and Malang are recommended to be evaluated in further advanced yield trials in different environments.

scholarly journals Association of Characters for Higher Tuber Yield of Potato (Solanum tuberosum L.) Genotypes Grown in Eastern Plains of Nepal

2021 ◽  
pp. 37-47
Author(s):  
Tika Ram Chapagain ◽  
Amit Prasad Timilsina ◽  
Manish Kumar Thakur ◽  
Kumar Mani Dahal ◽  
Giridhari Subedi
Keyword(s):  
Seed Size ◽  
Tuber Yield ◽  
Cultural Practices ◽  
Agricultural Research ◽  
Solanum Tuberosum L ◽  
Block Design ◽  
Pooled Analysis ◽  
Yield Potential ◽  
Size Tuber ◽  
And Cluster Analysis

An experiment was conducted to study characters associated with higher yield potential of potato genotypes at the Directorate of Agricultural Research, Tarahara, Nepal during two consecutive winter seasons of 2018 and 2019. A total of eleven potato genotypes (CIP 394600.52, CIP 396012.266, CIP 393371.159, PRP 266265.15, CIP 395443.103, CIP 393371.164, PRP 336769.1, PRP 136368.9, PRP 25861.11, CIP 377957.5 and PRP 225861.5) were evaluated in a Randomized Complete Block Design with four replications. Each treatment received a 7.2 m2 plot area with 60 cm row to row and 25 cm plant to plant spacing, accommodating 48 plants per plot. Cultural practices were done as per the recommendations and fungicide was not applied for late blight of potato (Phytophthora infestans) control. The observed data were subjected to variance, correlation and cluster analysis. Analysis of variance showed significant differences for some plant and tuber characteristics. From the pooled analysis of two years’ data, the genotype 'PRP 266265.15' was found to be a suitable genotype in plains due to its higher yield (21.91 t/ha) and other yield characteristics. The higher quantity of over seed-size and under seed-size tuber contributed to the highest tuber yield of PRP 266265.15. The weight (r = 0.928**) and number (r = 0.483**) of the over seed-size tuber had a positive significant correlation with tuber yield per hectare. Further research is needed to study yield stability of the genotype 'PRP 266265.15' in various locations with similar production environments.

scholarly journals Production potential of newly released potato (Solanum tuberosum L.) cultivars under different nitrogen levels

2016 ◽  
Vol 13 (2) ◽  
pp. 121-130 ◽  
Author(s):  
SK Das ◽  
H Banerjee ◽  
A Chakraborty ◽  
A Sarkar
Keyword(s):  
Solanum Tuberosum ◽  
Field Experiments ◽  
Tuber Yield ◽  
West Bengal ◽  
Solanum Tuberosum L ◽  
Block Design ◽  
The State ◽  
Recommended Dose ◽  
Nitrogen Levels ◽  
Positive Balance

Field experiments were conducted during rabi seasons of 2011-12, 2012-13, 2013-14 and 2014-15 at C-unit research farm of Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia, West Bengal, India to study the effects of different levels of nitrogen on the productivity of newly released potato (Solanum tuberosum L.) cultivars under lower Gangetic plains of West Bengal. The experiment was laid out in a factorial randomized block design with four replications having ten treatment combinations viz. two levels of newly released cultivars (V1 - Kufri Himalini and V2 - Kufri Shailja) as factor A and five levels of nitrogen (N0 -0 kg ha-1, N75 -75 kg ha-1, N150 -150 kg ha-1 N225-225 kg ha-1 N300 -300 kg ha-1) as factor B. Experimental results revealed that highest tuber yield (25.77 t ha-1) was recorded with Kufri Himalini receiving 300 kg N ha-1 followed by 24.64 t ha-1 and 23.64 t ha-1 with 225 kg N ha-1 and 150 kg N ha-1 respectively which is quite higher than the state average of 22.02 t ha-1 obtained from the state recommended dose of 200 kg N ha-1, 150 P2O5 ha-1 and150 K2O ha-1. Thus recently released variety Kufri Himalini, having moderate resistance against late blight, which is a serious problem in the state at present can be a better option for the farmers of the state to raise the potato production. Kufri Himalini produced significantly higher (14.1%) total tuber yield over Kufri Shailja and it was found to be more acceptable to the farmers in terms of production of marketable tuber (> 75 g grade). Grade wise tuber yield of potato was significantly influenced by N levels. Irrespective of cultivars application of 300 kg N ha-1 along with recommended dose of P and K recorded the highest total potato tuber yield (23.55 t ha-1) which was found statistically at par with the application of 225 kg N ha-1 and 150 kg N ha-1. Nitrogen fertilization improved the tuber yield of potato by 49.5 to 82.1% over control. Kufri Himalini was more responsive to fertilizer nitrogen than Kufri Shailja as it recorded higher agronomic efficiency (AEN), apparent recovery (REN) and physiological efficiency (PEN) at all nitrogen levels. There was a positive balance of nitrogen found in all treatments. Net gain of soil N was highest with ‘Kufri Himalini’ receiving 150 kg N ha-1. Kufri Himalini gave highest net return with 300 kg N ha-1.SAARC J. Agri., 13(2): 121-130 (2015)

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