scholarly journals Response of Potato to nitrogen and phosphorus fertilizer at Wag-Lasta Areas of Eastern Amhara, Ethiopia

2020 ◽  
Author(s):  
Workat Sebnie ◽  
Tilahun Esubalew ◽  
Merse Mengesha
Keyword(s):  
Plant Height ◽  
Crop Yields ◽  
Block Design ◽  
Total Yield ◽  
Yield Component ◽  
Command Area ◽  
Nitrogen And Phosphorus ◽  
Combined Application ◽  
Irrigation Condition ◽  
Phosphorous Fertilizer

Abstract Background: Production and productivity of potato in Ethiopia is far below the world average due to soil fertility problem, pest, disease, and agronomic factors. Nutrient depletion due to soil erosion is a serious problem in Ethiopian highlands. Annually, nitrogen 122 kg ha-1 P 13 kg ha-1 and K 82 kg ha-1 were estimated to deplete from Ethiopia (Haileslassie et al., 2005). The essential nutrients like, nitrogen and phosphorus are the most important influential nutrient for the production of potato but they are deficient in most Ethiopian soils and thus an application of these nutrients could increase significantly the crop yields. In this context, an experiment was conducted at Sekota and Lasta Lalibela districts (Woleh and Kechin Abeba irrigation command areas) of eastern Amhara to investigate the effects of nitrogen and phosphorus fertilizers for yield and yield component of potato under irrigation condition. Methods: Four rates of nitrogen (0, 46, 92, and 138 kg N kg ha-1) and four rates of phosphorus (0, 23, 46, and 69 Kg P2O5 kg ha-1) were combined in the factorial arrangement and laid out in randomized complete block design with three replications. Results: The result of the study revealed that nitrogen and phosphorus had a significant effect on plant height, marketable, and total yield of potato at Kechin Abeba. But phosphorus did not show a significant effect on plant height and unmarketable yield at Sekota district of Woleh irrigation command area. The highest yield 45.55 t ha-1 was obtained from in combined application of 138 N and 23 P2O5 in Lalibela and 17.12 t ha-1 was obtained from in combined application of 138 N kg ha-1 and 46 P2O5 kg ha-1 from Sekota districts of Woleh irrigation command area. Conclusion: The application of nitrogen and phosphorous fertilizer in the study area were more efficient in terms of tuber yield in Lalibela (Kechin Abeba) than Woleh. The application of 138 kg ha-1 N combined with 23 kg ha-1 P2O5 is found to be the appropriate rates for optimum productivity of Potato at Lalibela (Kechin Abeba) and Sekota (Woleh) under irrigation conditions and the same agro-ecology.

scholarly journals Response of Potato (Solanum tuberosum L.) to nitrogen and phosphorus fertilizer at Wag-Lasta Areas of Eastern Amhara, Ethiopia

2020 ◽  
Author(s):  
Workat Sebnie ◽  
Tilahun Esubalew ◽  
Merse Mengesha
Keyword(s):  
Plant Height ◽  
Crop Yields ◽  
Solanum Tuberosum L ◽  
Block Design ◽  
Total Yield ◽  
Yield Component ◽  
Command Area ◽  
Nitrogen And Phosphorus ◽  
Combined Application ◽  
Irrigation Condition

Abstract Background: Production and productivity of potato in Ethiopia is far below the world average due to soil fertility problem, pest, disease, and agronomic factors. Nutrient depletion due to soil erosion is a serious problem in Ethiopian highlands. Annually, 122 kg ha-1 nitrogen, 13 kg ha-1 phosphorous and 82 kg ha-1 potasium were estimated to deplete from Ethiopia (Haileslassie et al., 2005). The essential nutrients like, nitrogen and phosphorus are the most important influential nutrient for the production of potato but they are deficient in most Ethiopian soils and thus an application of these nutrients could increase significantly the crop yields. In this context, an experiment was conducted at Sekota and Lasta Lalibela districts (Woleh and Kechin Abeba irrigation command areas) of eastern Amhara, Ethiopia to investigate the effects of nitrogen and phosphorus fertilizers for yield and yield component of potato under irrigation condition. Methods: Four rates of nitrogen (0, 46, 92, and 138 kg N kg ha-1) and four rates of phosphorus (0, 23, 46, and 69 Kg P2O5 kg ha-1) were combined in the factorial arrangement and laid out in randomized complete block design with three replications. Results: The result of the study revealed that nitrogen and phosphorus had a significant effect on plant height, marketable, and total yield of potato at Kechin Abeba. But phosphorus did not show a significant effect on plant height and unmarketable yield at Sekota district of Woleh irrigation command area. The highest yield 45.55 t ha-1 was obtained from in combined application of 138 N and 23 P2O5 in Lalibela and 17.12 t ha-1 was obtained from in combined application of 138 N kg ha-1 and 46 P2O5 kg ha-1 from Sekota districts of Woleh irrigation command area. Conclusion: The application of 138 kg ha-1 N with 23 kg ha-1 P2O5 is the appropriate rates for optimum productivity of Potato at Lalibela (Kechin Abeba) and Sekota (Woleh) irrigation schemes and the same agro-ecology.

scholarly journals Response of Potato to Nitrogen and Phosphorus Fertilizer at Wag-Lasta Areas of Eastern Amhara, Ethiopia

2020 ◽  
Author(s):  
Workat Sebnie ◽  
Tilahun Esubalew ◽  
Merse Mengesha
Keyword(s):  
Plant Height ◽  
Crop Yields ◽  
Cost Benefit Analysis ◽  
Block Design ◽  
Total Yield ◽  
Cost Benefit ◽  
Yield Component ◽  
Command Area ◽  
Nitrogen And Phosphorus ◽  
Combined Application

Abstract Background: Production and productivity of potato in Ethiopia is far below the world average due to soil fertility and other complicated problems. From the production constraints nutrient depletion due to soil erosion is a serious problem. Annually, nitrogen 122 kg ha-1 P 13 kg ha-1and K 82 kg ha-1 was estimated to deplete from Ethiopia (Haileslassie et al., 2005). The essential nutrients like, nitrogen and phosphorus are the most important influential nutrient for production of potato but they are deficient in most Ethiopian soils and thus application of these nutrients could significantly increase crop yields. In this context an experiment was conducted at Sekota and Lasta Lalibela districts (Woleh and Kechin Abeba irrigation command areas) of eastern Amhara to investigate the effects of nitrogen and phosphorus fertilizers for yield and yield component of potato under irrigation condition. Methods: Four rates of nitrogen (0, 46, 92 and 138 Kg N kg ha-1) and four rates of phosphorus (0, 23, 46, and 69 Kg P2O5 kg ha-1) were combined in factorial arrangement and laid out in randomized complete block design with three replications. Results: the result of the study revealed that nitrogen and phosphorus had significant effect on plant height, marketable, and total yield of potato. But phosphorus did not show a significant effect on plant height and unmarketable yield at Sekota district of Woleh irrigation command area. Highest yield 45.55 t ha-1 was obtained from in combined application of 138 N and 23 P2O5 in Lalibela and 17.12 t ha-1 was obtained from in combined application of 138 N and 46 P2O5 from Sekota districts of Woleh irrigation command area. Conclusion: application of nitrogen and phosphorous fertilizer in the study area was more efficient in terms of tuber yield in Lalibela (Kechin Abeba) than Woleh. Cost benefit analysis indicated that application of 46 N kg ha-1 and 23 P2O5 kg ha-1 is required for optimum production of potato in Woleh and application of 138 kg ha-1 N combined with 23 kg ha-1 P2O5 is found to be the appropriate rates for optimum productivity of Potato at Lalibela under irrigation conditions and the same agro-ecology.

scholarly journals Response of potato (Solanum tuberosum L.) to nitrogen and phosphorus fertilizers at Sekota and Lasta districts of Eastern Amhara, Ethiopia

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Workat Sebnie ◽  
Tilahun Esubalew ◽  
Merse Mengesha
Keyword(s):  
Plant Height ◽  
Crop Yields ◽  
Solanum Tuberosum L ◽  
Block Design ◽  
Total Yield ◽  
Yield Component ◽  
Command Area ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Fertilizers ◽  
Command Areas

Abstract Background Production and productivity of potato in Ethiopia is far below the world average because of soil fertility problem, pest, disease, and agronomic factors. Nutrient depletion because of soil erosion is a serious problem in Ethiopian highlands. Annually, 122 kg ha−1 nitrogen, 13 kg ha−1 phosphorous and 82 kg ha−1 potasium were estimated to deplete from Ethiopia (Haileslassie et al. 2005). From the essential nutrients especially, nitrogen and phosphorus are the most important influential elements for production of potato but they are deficient in most Ethiopian soils and thus an application of these nutrients could increase significantly the crop yields. Therefore, the experiment was conducted at Sekota and Lasta Lalibela districts (Woleh and Kechin Abeba irrigation command areas) of eastern Amhara, Ethiopia to investigate the effects of nitrogen and phosphorus fertilizers for yield and yield component of potato under irrigation condition. Methods Four rates of nitrogen (0, 46, 92, and 138 kg N kg ha−1) and phosphorus (0, 23, 46, and 69 Kg P2O5 kg ha−1) were combined with factorial arrangement and laid out in randomized complete block design with three replications. Results The result of the study revealed that nitrogen and phosphorus had a significant effect on plant height, marketable, and total yield of potato at Kechin Abeba. But phosphorus did not show a significant effect on plant height and unmarketable yield at Sekota district of Woleh irrigation command area. The highest yield 45.55 t ha−1 was obtained from combined application of 138 N and 23 P2O5 in Lalibela 17.12 and 16.99 t ha−1 were found from application of 138 N with 46 P2O5 kg ha−1 and 138 N with 23 P2O5 kg ha−1 from Sekota district of Woleh irrigation command area respectively. Conclusions The application of 138 kg ha−1 N with 23 kg ha−1 P2O5 is the appropriate rates for optimum productivity of potato at Lalibela (Kechin Abeba) and Sekota (Woleh) irrigation command areas and the same agro-ecology.

scholarly journals Growth and Yield Components of Groundnut (Arachis hypogeal L.) as Affected by Phosphorous Fertilizer Application on the Jos Plateau

2019 ◽  
pp. 1-8
Author(s):  
I. Ibrahim, Iro ◽  
A. Jameela ◽  
K. N. Ninani
Keyword(s):  
Plant Height ◽  
Yield Components ◽  
Block Design ◽  
Total Yield ◽  
Fertilizer Application ◽  
Germination Percentage ◽  
Growth And Yield ◽  
Jos Plateau ◽  
Plateau State ◽  
Phosphorous Fertilizer

The experiment was conducted in Federal College of Forestry demonstration farm Jos, Plateau State to determine the growth and yield components groundnut as affected by phosphorous fertilizer application on the Jos plateau. The experimental design used was a randomized complete block design (RCBD) comprising of four treatments (0, 20, 40 and 60 kg P ha-1) that were replicated four times on groundnut (SAMNUT 25). Data was collected on germination percentage, plant height, leaf count, number of branches, days to 50% flowering, number of pods/plant, 100 seeds weight, total yield and biomass weight which were analysed using analysis of variance (ANOVA) at 5% level of probability with Minitab 23. Where significance was declared, Fisher LSD method was used to separate the means. The result reveals that no significant effect was recorded for germination percentage. Highly significant effect of phosphorous was observed on the growth and yield components of groundnut. The highest (34.63 cm) plant height, leaf (100.78) count, number (27.13) of branches, days (27.75 days) to 50% flowering, number (34.50) of pods/plant, 100 seeds (52.08 g) weight, total (2.26tha-1) yield and biomass (5.42 tha-1) weight at the application of 60 kg P ha-1. Thus, groundnut farmers are encouraged to engage in the application of 60kg P ha-1 for optimum growth and yield. Further research on other varieties should be conducted to ascertain the best variety and phosphorous rate for optimum groundnut production in the study area.

scholarly journals Aplikasi Pestisida Nabati Maja - Gadung dan Metabolit Sekunder Beauveria Bassiana Bals. Untuk Mengendalikan Hama Thrips Sp. Pada Tanaman Cabai Rawit

2021 ◽  
Vol 2 ◽  
pp. 187-193
Author(s):  
Tarjoko Tarjoko ◽  
Mujiono Mujiono
Keyword(s):  
Plant Height ◽  
Beauveria Bassiana ◽  
Block Design ◽  
Fruit Weight ◽  
Limiting Factor ◽  
Predator Population ◽  
Single Application ◽  
Combined Application ◽  
Botanical Pesticide ◽  
Number Of Leaves

Pest attacks on chili plants are the main limiting factor in cultivation activities. The research  aims to determine the effect of single application of botanical pesticide maja-gadung (PMG), single application of secondary metabolite Beauveria bassiana BIO (BIO B10), combined application of PMG and BIO B10  on pest populations, predator populations and plant growth and production of  chili. The  reesearh used a factorial Completely Randomized Block Design (RAKL) with 3 replications, so there were 9 treatment combinations (0 ml/l PMG, 4 ml/l PMG, 8 ml/l BIO B10, 0 ml/l PMG, 2  ml/l BIO B10,  4 ml/l BIO B10, 4 ml PMG+2 ml/l BIO B10,  4 ml/ml PMG+4 ml BIO B10, 8 ml/l  PMG+2ml/l BIO B10, 8 ml/l PMG+4 ml/l BIO B10). The variables observed were Thrips sp population, predator population, plant height, number of leaves, and fruit weight per plant. The results showed that the single application treatment of PMG  with a concentration of 4 ml/l and 8 ml/l was able to suppress the population of Thrips sp. by 21.6% and 41.4% compared to the control. The single application treatment of BIO B10  with concentrations of 2 ml/l and 4 ml/l was able to suppress the population of Thrips sp. by 66.5% and 65.5% compared to the control. The best combination application is PMG  and BIO B10with a concentration of 8 ml/l + 4 ml/l which is able to suppress the population of Thrips sp. by 76.9% compared to the control. The application treatment of PMG andBIO B10 did not affect plant height, number of leaves, and fruit weight per plant.

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>

Appropriate Nitrogen and Phosphorus Fertilizer Regime for Sunflower (Helianthus Annuus L.) In the Humid Tropics

Helia ◽  
2019 ◽  
Vol 42 (70) ◽  
pp. 111-125
Author(s):  
E. Akpojotor ◽  
V.I.O. Olowe ◽  
C. Adejuyigbe ◽  
S.O. Adigbo
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Agricultural Research ◽  
Block Design ◽  
Field Trials ◽  
Humid Tropics ◽  
Single Application ◽  
Nitrogen And Phosphorus ◽  
Yield Attributes ◽  
P Fertilizer

AbstractTwo field trials were conducted on the Research Farm of the Institute of Food Security, Environmental Resources and Agricultural Research, Nigeria during the late cropping seasons (Jun.–Nov.) of 2014 and 2015 to evaluate the agronomic performance of four recently released sunflower varieties (SAMSUN-1, SMASUN-2, SAMSUN-3 and SAMSUN-4) to three fertilizer regimes: Control, Split application of 30 kg N + 28 kg P2O5 at 21 days after sowing (DAS) and at anthesis and Single application of 60 kg N and 56 kg P2O5 at 21DAS. The experiment was laid out in a randomized complete block design using a 3 × 4 factorial arrangement and replicated three times. Data were collected on phenology, plant height, seed yield and yield attributes, and quality. The varietal effect was only significant in 2015 for head weight, a number of achene per head and 100 achene weight. Application of N and P fertilizer either as split or single significantly (P ≤ 0.05; F-test) enhanced plant height at R5 and R9, 100 achene weight, achene weight per head and grain yield in both years. Single application resulted in significantly (P ≤ 0.05) higher grain yield in 2014 than the split and control and was on par with a split. Significant variety × fertilizer regime was recorded for protein content in 2014 and 2015, and oil content in 2015. Therefore, a single application of N and P fertilizers at 21 WAS is recommended for adoption in the humid tropics to enhance seed and oil production of SAMSUN-3 and SAMSUN-4.

scholarly journals Response of wheat yield and its components to zinc and iron application under different levels of nitrogen

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Gheith El-Sayed ◽  
◽  
Ola El-Badry ◽  
Keyword(s):  
Grain Yield ◽  
Protein Content ◽  
Plant Height ◽  
Block Design ◽  
Wheat Yield ◽  
Grain Protein Content ◽  
Yield Component ◽  
Grain Protein ◽  
Research Station ◽  
Randomized Complete Block Design

To evaluate the effect of nitrogen, zinc and iron as soil application on yield and yield component of wheat, the present study was conducted at Agricultural and Experimental Research Station at Giza, Faculty of Agriculture Cairo University, Egypt during 2015/2016 and 2016/2017 seasons. The experimental design was split-plot in randomized complete block design with three replications. Results showed that positive significant effect on plant height, number of spike/m2, spike length; number of grain per spike, grain yield per unit area in both seasons and grain protein content in one season were achieved by application of N and the micronutrients. Whoever, the highest significant in the above mentioned characters was obtained either by application the highest N levels (100kg N /fed.) or in addition to mixture of Zn and Fe. The interaction between the studied factors had significant effect on plant height and grain yield in both seasons as well as on grain protein content in the second season, where the highest values of these parameters were recorded by application of 100kg N/fed., Zn and Fe in mixture.

scholarly journals Evaluation of exotic oat (Avena sativa L.) varieties for forage and grain yield in response to different levels of nitrogen and phosphorous

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e12112
Author(s):  
Hamida Bibi ◽  
Suleman Hameed ◽  
Mudassar Iqbal ◽  
Amal Al-Barty ◽  
Hadeer Darwish ◽  
...  
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Block Design ◽  
Nitrogen And Phosphorus ◽  
Days To Flowering ◽  
Days To Maturity ◽  
Biological Yield ◽  
Number Of Leaves ◽  
The University ◽  
P Fertilizers

A field experiment was conducted during the Rabi season 2017–2018 (October–March) at the University of Agriculture, Peshawar research farm to examine the influence of different nitrogen (N) and phosphorus (P) levels on two different oat varieties: Australian and Ukrainian. The treatments included control and three levels of nitrogen and phosphorus at 30, 60, and 90 kg ha−1. The treatments were arranged in randomized complete block design (RCBD) and replicated three times. The findings showed that the oat varieties were significantly different from one another in yield and yield parameters. The Australian variety recorded higher emergence (49 plants m−2), days to emergence (15 days), days to flowering (122 days), days to maturity (145 days), plant height (142.7 cm), number of leaves (6.03 leaves plant−1), number of tillers (92.2 tillers m−1), biological yield (8,179.2 kg ha−1), and grain yield (3,725.6 kg ha−1) than the Ukrainian variety. Similarly, different N and P levels, the maximum days to emergence, days to flowering, and days to maturity were recorded in a control plot. The application of 105 kg N + 90 kg P ha−1 was statistically similar to the application of 105 kg N + 60 kg P ha−1. Maximum emergence (60 plants m−2), number of leaves (7.0 leaves plant−1), plant height (118.6 cm), number of tillers m−1 (102.6), biological yield (9,687.5 kg ha−1), and grain yield (4,416.7 kg ha−1) were determined in Australian variety. Based on the findings of this study, the Australian variety performed better in terms of yield and yield components and the application of N and P fertilizers at the rate of 105 kg N + 60 kg P ha−1 produced the best results in both oat varieties.

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.

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