scholarly journals Response of Two Wheat Cultivars to Nitrogen and Phosphorus Fertilizer Rates

2018 ◽  
Vol 9 (2) ◽  
pp. 159-163
Author(s):  
A. Galelah ◽  
Dalia El hag ◽  
H. Hendawy
Keyword(s):  
Wheat Cultivars ◽  
Phosphorus Fertilizer ◽  
Nitrogen And Phosphorus ◽  
Fertilizer Rates

scholarly journals Effect of Mineral Nitrogen and Phosphorus Fertilizer Rates on Marketable Yield and Economic Return of Tomato (Lycopersicon esculentum Mil) at Northwestern Zone of Tigray

2019 ◽  
pp. 1-7
Author(s):  
Yohannes Gebremichael ◽  
Gebremedhen Gebretsadikan
Keyword(s):  
Block Design ◽  
Tomato Fruit ◽  
Ammonium Phosphate ◽  
Growth And Yield ◽  
Northern Ethiopia ◽  
Phosphorus Fertilizer ◽  
Nitrogen And Phosphorus ◽  
Marginal Rate ◽  
Fertilizer Rates ◽  
Different Levels

A field experiment was conducted to study the effect of different nitrogen and phosphorus fertilizer rates on the growth and yield tomato at Northwestern Zone of Tigray during 2016-2017 cropping season under irrigation condition. It  is  the  most  cultivated  and  high  market  value  of  vegetable crops  in  Tigray  Northern Ethiopia. However, tomato production is limited due to low fertility of soil and inappropriate fertilizer rate. Six different levels of nitrogen (0, 23, 46, 69, 92 and 115 kg N /ha) and six different levels of phosphorus (0, 46, 69, 92,115 and 138 kg P2O5/ ha) were used and laid out in randomized complete block design with three replication. (Melkasalsa) tomato variety was used as a testing variety. The current findings showed that the highest marketable tomato fruit yield (61.16 t/ha) were obtained in 115 kg N/ha (250 kg urea/ha) and 92 kg P2O5 (200 kg Di Ammonium Phosphate DAP /ha).  But, the profitable yield obtained was at N2P2 (46 kg N & 69 P2O5 kg ha-1) that is 100 kg/ha of Urea combined with 150 kg/ha of DAP yield was obtained 48.25 t ha-1 and the profit was 235502 birr per ha with the maximum Marginal Rate of Return of 26.16%. Therefore, 100 kg/ha of urea with 150 kg/ha of DAP was recommended for the growers to improve tomato fruit productivity in the study area.

scholarly journals Effects of Nitrogen and Phosphorus Fertilizer Rates on Maize (Zea mays L.) Growth and Yields in Terraced Lands of Medium and High Altitude Regions of Rwanda

2020 ◽  
Author(s):  
A. Fashaho ◽  
A. O. Musandu ◽  
J. J. Lelei ◽  
S. M. Mwonga ◽  
G. M. Ndegwa
Keyword(s):  
Zea Mays ◽  
High Altitude ◽  
Zea Mays L ◽  
Block Design ◽  
Fertilizer Application ◽  
Phosphorus Fertilizer ◽  
Nitrogen And Phosphorus ◽  
Maize Yields ◽  
Four Levels ◽  
Fertilizer Rates

Depletion of nitrogen and phosphorus in terraced hilly areas of Rwanda has lowered maize (Zea mays L.) production. Trials were carried out in 2017 and 2018 in four-year-old-terraced Lixisols and Acrisols of medium and high altitudes to determine effect of nitrogen and phosphorus fertilizer application rates on maize yields. A factorial arrangement of four levels of nitrogen (0, 60, 120 and 180 kg N ha-1) and phosphorus (0, 40, 80 and 120 kg P2O5 ha-1) in a randomized complete block design with 3 replications, was used. Results showed that combinations of 120 - 180 kg N ha-1 and 80 - 120 kg P2O5 ha-1 resulted in significantly (P less than 0.05) higher increases in plant height (45 – 60 % and 56 – 70 % over the control), stem collar diameter (63 – 74 % and 43 % over the control) and grain yields (3 times over the control; i.e. 6.40 – 6.46 t ha-1 and 6.02 - 6.12 t ha-1) in medium and high altitude sites. The optimum fertilizer rates are 176.6 kg N ha-1 and 96.2 kg P2O5 ha-1 in terraced Lixisols of medium altitude area. Land use needs to adjust fertilizer application to these optimum rates for enhanced maize yields in this area and other regions with similar agro-ecological characteristics. Further studies on integrated effects of N and P fertilizers are recommended.

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