Effect Of Nitrogen Rates Research Articles

Effect of nitrogen and potassium fertilization rates on yield, fruit quality, net profit and investment ratio of El-shamia cactus pear

Effect of nitrogen and potassium fertilization rates on yield, fruit quality, net profit and investment ratio of El-shamia cactus pear

Review on the effect of nitrogen and phosphorus fertilizer rates on seed yield of onion (Allium Cepa L.)

Review on the effect of nitrogen and phosphorus fertilizer rates on seed yield of onion (Allium Cepa L.)

Validation of Nitrogen and Phosphorus Fertilizers Application Rates for Maize (<i>Zea mays</i> L.) in Yeki District, Southwest of Ethiopia

Maize (Zea mays L.,) is an important smallholder crop grown in Ethiopia. Its yields are low because of a decline in soil fertility, insufficient use of fertilizers, and blanket use of fertilizer. However, there is no Nitrogen and Phosphorus fertilizer recommendation for Maize in Yeki District. A three-year field experiment was conducted to verify the effects of nitrogen and phosphorus fertilizer rates for maize. The experiment consisted of three treatments; 92 kg N ha-1 + 69 kg P2O5 ha-1, 64 Kg N ha-1 + 46 kg P2O5 ha-1and no fertilizer (control) laid out using a randomized complete block design with four replications. The replication represents the four locations selected for the test. The results of the study showed that the application of 92 kg N ha-1+ 69 kg P2O5 ha-1significantly increased the growth parameters and yield of maize when compared to the other treatments. The highest maize grain yield (10052.9 kg ha-1) was obtained from the application of 92 kg N ha-1 with 69 kg P2O5 ha-1. This study further confirms the significant role of nitrogen and phosphorus fertilizers for maize production. From the result of the study, the application rate of 92 kg N ha-1 + 69 kg P2O5 ha-1 is recommended for increasing maize yield, particularly in the study area, and also it is economically feasible.

Assessing disease severity of rice blast under different rates of nitrogen fertilizer and planting system

The study aimed to determine the effect of nitrogen rates and planting systems on the incidence and severity of rice blast under naturally infected rice plants and their relationship to rice yield performance. Recommended nitrogen rate for both direct seeding was 93.2kg/ha. Treatments consisted of 75% recommended-N rate, 100% recommended-N rate, 150% recommended-N, and existing farmer’s practice. Treatments were applied in a three-way splitted-N application at 14, 30, and 45 days after planting, respectively. The results indicate that rates of N fertilization affected disease incidence of the rice blast where the low-N application was generally lower than recommended-N rate, high-N rate, and farmer’s practice, both on jajar legowo 2:1 and broadcasted direct seeding. This study revealed that recommended-N application, although has a higher disease incidence than low-N application, could tolerate yield loss due to rice blast by producing more productive tillers, number of grains per panicle, and reducing the number of unfilled grains. This study generally showed that jajar legowo 2:1 direct seeding gave lower disease incidence and severity to the rice blast than broadcasted direct seeding. The study suggested an appropriate recommended-N rate and jajar legowo 2:1 direct seeding (double row) was incorporated into the rice blast management strategies.

Effect of Nitrogen Rates on Leaf Quality of Two Cassava (Manihot Esculenta Crantz) Varieties as a Feed for Eri-Silkworm (Samia Cynthia Ricini Boisduval) Cocoon Production at Jimma, Southwest Ethiopia

Effect of Nitrogen Rates on Leaf Quality of Two Cassava (Manihot Esculenta Crantz) Varieties as a Feed for Eri-Silkworm (Samia Cynthia Ricini Boisduval) Cocoon Production at Jimma, Southwest Ethiopia

Response of endogenous brassinosteroids to nitrogen rates and its regulatory effect on spikelet degeneration in rice

<p indent=0mm>In order to investigate whether and how brassinosteroids (BRs) mediate the effect of nitrogen (N) rates on spikelet degeneration of rice, rice cultivars Yangdao 6 and Yongyong 2640 were grown in pots subjected to three N rates in the whole growth periods. The contents of N, BRs, hydrogen peroxide (H₂O₂) and total antioxidant capacity (T-AOC) in young rice panicles at meiosis stage and their relationship with spikelet degeneration rate were observed. The results showed that the decreased spikelet degeneration rate was closely associated with enhanced 24-epicastasterone (24-epiCS) and 28-homobrassinolide (28-homBL) contents in young panicles. When N content of rice panicle was 1.25%, the BRs (24-epiCS and 28-homBL) content in young panicle increased significantly, and the spikelet degeneration rate decreased. The variation trend of T-AOC level was very consistent with BRs, and T-AOC was significantly negatively correlated with spikelet degeneration rate, whereas the variation trend of H₂O₂ content was opposite to that of T-AOC and BRs contents in the young panicles. Application of exogenous BRs (24-epiCS or 28-homBL) to young panicles could significantly increase the T-AOC level and contents of endogenous 24-epiCS and 28-homBL, but significantly reduce the H₂O₂ content and spikelet degeneration rate, while application of BRs synthesis inhibitor had the opposite effect. In summary, BRs mediated the effects of N application rates on spikelet degeneration, and elevated BRs contents in young panicles could inhibit spikelet degeneration by elevating antioxidant capacity under a proper panicle N content (1.25%) at meiosis stage in rice.

Evaluation of energy use efficiency and greenhouse gas emission in rapeseed (Brassica napus L.) production in paddy fields of Guilan province of Iran

This study aimed to investigate the effects of nitrogen rates, tillage, and planting methods on the energy use efficiency (EUE) and greenhouse gas emissions (GHG) of rapeseed (Brassica napus L.) cultivation after rice harvesting in paddy fields. A split factorial experiment in a complete randomized block design was conducted at the Rice Research Institute of Iran during 2016–2018. The conventional tillage, minimum tillage, and no-tillage methods were considered as the main plots and two planting methods of direct seeding and transplanting, and the amounts of 0, 100, 200, and 300 kg ha−1 of pure nitrogen (N) as factorial in subplots. The results showed that the treatments of CTN3 (conventional tillage × transplanting × 300 kg of N fertilizer) with the averages of 39174.8 MJ ha−1 and 1108.36 kg CO2 eq. ha−1, and CDN3 (conventional tillage × direct seeding × 300 kg of N fertilizer) with 38386.0 MJ ha−1 and 1138.36 kg CO2 eq. ha−1 had the highest energy input and GHG emissions, respectively. Maximum EUE and energy productivity and low GHG were obtained using the treatment combinations of no-tillage and minimum tillage at 100 kg ha−1 of nitrogen in both planting methods, suggesting them as the promising choices for planting rapeseed in Guilan province.

NITROGEN RATES AND SOWING DATES INFLUENCE THE SEVERITY OF WHITE SPOT DISEASE AND GRAIN YIELD OF MAIZE

The objective of this study was to analyze the effects of nitrogen rates and sowing dates on the severity of white spot disease (WSD) in first season maize hybrids, and their correlation with relative chlorophyll content, thousand grain weight and yield. The experiment was set in a randomized block design with treatments arranged in split-split plots. Two hybrids were tested in the main plots: AG9025 PRO3 (super early) and 30F53 VYH (early). Two sowing dates were evaluated in the split plots: preferential (9/20/2016) and late (12/05/2016). Four nitrogen rates were applied in the split-split plots. Nitrogen rates were top-dressed at the V4, V8 and V12 vegetative stages. The relative chlorophyll content reading was performed at VT stage. The quantification of WSD severity was made at R6, using diagrammatic scale. The AG9025 PRO3 hybrid showed higher average WSD severity (17.7%) than the 30F53 VYH (9.3%). The preferential sowing date showed lower severity (2.2%) compared to the late sowing date (31.4%). There was a significant positive correlation between the disease severity and the relative chlorophyll content, thousand grain weight and grain yield, except for the 30F53 VYH hybrid on the late sowing date. The hybrid AG9025 PRO3 showed increase in WSD severity when the highest nitrogen rates were applied, on both sowing dates. The effect of N rates on WSD was not significant for the 30F53 VYH hybrid. The late sowing time generates greater disease severity. The AG9025 PRO3 hybrid is more susceptible and the severity of its white spot is increased with the increment in N doses. There is a positive correlation between the relative chlorophyll content, disease severity, yield and thousand grain weight.

Optimizing irrigation and nitrogen management strategy to trade off yield, crop water productivity, nitrogen use efficiency and fruit quality of greenhouse grown tomato

Water and nitrogen are two main factors affecting crop yield and quality, and their optimization is crucial for sustainable agriculture production. In this study, the results of a three-year (2017–2019) experiment were presented to reveal the effects of irrigation and nitrogen rate on yield, crop water productivity (WP), nitrogen use efficiency (Partial Factor Productivity Nitrogen, PFPn) and fruit quality. Irrigation was applied based on the cumulative evaporation (Epan) measured with a standard 20-cm pan with its amounts set as 50% (I1), 70% (I2), 90% (I3) of Epan, while the nitrogen rates were designed as 0 (N0), 150 (N1), 300 (N2) and 450 (N3) kg ha−1. Averaging across nitrogen rates and years, I2 decreased tomato yield and PFPn by 4.00% and 4.07%, respectively, when compared with I3, while significantly increased WP, vitamin C (Vc), total soluble solid (TSS), soluble sugar content (SSC) and organic acids (OA) by 7.68%, 8.64%, 5.42%, 7.15% and 7.15%, respectively. Averaging across irrigation amounts and years, applying nitrogen rates more than 300 kg ha−1 not only failed to increase yield, but also reduced WP, Vc, SSC, sugar-acid ratio (SAR) and PFPn. Compared with N2, the yield, WP and fruit quality decreased slightly in N1, whereas the nitrogen rate decreased by 50%. Both the principal component analysis and gray relational analysis were identified as suitable models for assessing comprehensive fruit quality. The relative value of TSS had a highly positive relationship with comprehensive quality score, indicating that TSS could be used as an index representing comprehensive fruit quality. TOPSIS (technique for order preference by similarity to ideal solution) revealed that N1I2 was the optimal irrigation and nitrogen rate for greenhouse grown tomato.

Response of Mung Bean [Vigna radiata (L.) Wilczek] to Levels of Nitrogen and Phosphorus Fertilizer under Irrigation in Central Ethiopia

Mung bean has become an important cash and food crop in dry land areas of Ethiopia. However, there is no sufficient research information on the nitrogen (N) and phosphorus (P) fertilizers rates for the crop in the study area. Thus, field experiment was conducted to determine the effects of N and P fertilizer rates on growth, yield components and yield of mung bean under irrigation at Nura-Era, central Ethiopia. The treatments consisted of factorial combinations of three N fertilizer rates (0, 23 and 46 kg N ha-1) in the form of Urea (46% N) and five P fertilizer rates (0, 10, 20, 30 and 40 kg P ha-1) in the form of Triple Superphosphate (20% P) laid out in randomized complete block design (RCBD) with three replications. Result of the main effect of nitrogen rate showed significantly highest number of primary branches per plant (4.25), number of pods per plant (17.7), and 100 seed weight (4.94 g) at 23 kg N ha-1. Similarly, the main effect of P fertilizer rate showed that the application of 40 kg P ha-1 produced significantly the highest number of primary branches per plant (4.79), highest number of pods per plant (20.85), the highest number of seeds per pod (6.24), the highest aboveground dry biomass (6838.83 kg ha-1), the highest 100 seed weight (5.21 g) and the highest harvest index (25.96%). The interaction of N and P rates showed that the combination of 23 kg N ha-1 and 40 kg P ha-1 gave the highest grain yield (1902.78 kg ha-1). Thus, the combination of 23 kg N ha-1 and 40 kg P ha-1 can be used to increase the productivity of mung bean in the study area.

Effect of starter nitrogen and phosphorus fertilizer rates on yield and yield components, grain protein content of groundnut (Arachis Hypogaea L.) and residual soil nitrogen content in a semiarid north Ethiopia

Increasing costs of chemical fertilizers, environmental concerns of their application and demand for protein foods, placed an extensive interest in growing of legume crops for human nutrition, and soil fertility replenishment. This study was conducted to investigate the effects of nitrogen (N) and phosphorus (P) fertilizers on parameters of phenology, growth performance, grain yield, yield components, grain protein content of groundnut, and residual soil nitrogen content in the northern Ethiopia during the growing season of 2017. Three levels of N (0, 15 and 30 kg ha−1) and four levels of P2O5 (0, 23, 46 and 69 kg ha−1) were set in factorial combinations of randomized complete block design with three replications. Results showed that an average total biomass yield increased by 22.5% for separate individual application of 15 kg N ha−1 and by 16.6% for 46 kg P2O5 ha−1 compared to control plots. Haulm yield increased by 29.17% for plots treated with N fertilization compared to control plots. Average pod yield increased by 85.4% for a combined application of 15 kg N ha−1 and 46 kg P2O5 ha−1 fertilizers compared to the control plots. Plots fertilized with the highest combined rates of N and P have attained lower grain yield compared to the combined application of 15 kg N ha−1 and 46 kg P2O5 ha−1. The highest grain protein contents were obtained for a combined application of 30 kg N ha−1 and zero P, and 15 kg N ha−1 plus 46 kg P2O5 ha−1. The highest N harvest index was obtained for control treatments and for plots treated with combined application of 15 kg N ha−1 and 46 kg P2O5 ha−1. Residual soil N content increased by 119% on plots with combined application of 15 kg N ha−1 and 46 P2O5 ha−1 compared to control plots. Based on our results, combined application of 15 kg N ha−1 and 46 kg P2O5 ha−1 was recommended for increasing grain yield, grain protein content and residual soil nitrogen. The results of this study are crucial to improve groundnut productivity, grain protein content and also to provide implication on soil fertility management in a crop rotation system.

Interactive Effects of Nitrogen and Drip Irrigation Rates on Root Development of Corn (Zea Mays L.) and Residual Soil Moisture

Deficiencies in water and nitrogen (N) can lead to poor crop growth and production. This study was carried out during 2012–2014 to determine (1) the effect of drip irrigation regimes and N fertilizer rates on root length density (RLD) of corn (Zea mays L. cv. Single cross 704) and soil moisture dynamics and (2) the relationship between root development and water availability. The experiment was arranged into a split-plot design with three irrigation regimes as the main factor (I1 = 60, I2 = 80, and I3 = 100% evapotranspiration [ETc]) and five levels of N fertilizer (N1 = 0, N2 = 50, N3 = 100, N4 = 150 and N5 = 200 kg/ha) as the subfactor. The combination I1N4 produced the highest grain yield and yield components while I3N5 gave the lowest performance. The highest RLD was recorded at full irrigation water requirement and it increased with increasing N rate, but not in a linear trend, as higher N rates showed less effect. Nitrogen application under drip irrigation increased the RLD in soil depending on irrigation level. Soil moisture was optimized at full irrigation water requirement and 150 kg/ha N.

Effects of Nitrogen and NPS Fertilizer Rates on Fresh Yield of Garlic (Allium sativum L.) at Debre Berhan, Ethiopia

Keeping in view of lack of recommended rates of N and NPS fertilizers, a field experiment was conducted to evaluate the effect of the newly introduced NPS fertilizer and nitrogen on growth, physiology and above ground biomass of garlic. Four NPS (0-0-0, 78.75-69-12.75, 105-92-17 and 131.25-115-21.25 kg N-P-S ha-1) and three nitrogen fertilizer rates (114.13, 228.26 and 278.33 kg N ha-1) were laid out in Randomized Complete Block Design with three replications. Significantly highest plant height (28.02 cm), leaf diameter (1.27 cm), dry and fresh weight (4.71 g and 6.11 g) and leaf length were recorded on garlic plants supplied with 105-92-17 kg N-P-S ha-1 and also the highest plant height (27.75 cm), leaf length (24.02 cm), fresh and dry weight (6.23 g and 5.04 g) were recorded on garlic plants supplied with 278.33 kg N ha-1. The interaction effect also show a significant effect in almost all the growth parameters; the early day to 50% emergence was recorded from a plot which received 228.26 kg N ha-1 and 105-92-17 kg NPS ha-1 and the highest plant height, leaf length, fresh and dry above ground biomass and leaf diameter were 29.62 cm, 25.60 cm, 6.93 g, 5.59 g and 1.4 cm, respectively were observed by the interaction of 278.33 kg N ha-1 and 105-92-17 kg N-P-S ha-1 with no significant difference with 228.26 N and 78.75-69-12.75 kg N-P-S ha−1. From this one season experiment, fertilizer rates 307.01-69-12.75 kg N-P-S ha−1 could be recommended for garlic production.

Effects of different nitrogen fertilizer types and rates on cotton leaf senescence, yield and soil inorganic nitrogen

ABSTRACT The effects of different nitrogen fertilizer types and rates on cotton leaf photosynthesis, yield and soil inorganic nitrogen were studied in two years of field experiments. Seven treatments were carried out: (1) Polymer-coated urea (PCU) mixed with urea (1:1 ratio) applied once at 126 kg N ha−1 (70% BBF); (2) PCU mixed with urea (1:1 ratio) applied once at 180 kg N ha−1 (100% BBF); (3) urea applied once at 126 kg N ha−1 (70% U1); (4) urea applied once at 180 kg N ha−1 (100% U1); (5) urea applied twice at 126 kg N ha−1 (70% U2); (6) urea applied twice at 180 kg N ha−1 (100% U2); and (7) no nitrogen fertilizer (Control). The seed cotton yield of the mixed treatment increased by 6.27–17.69% on average per year compared with the U2 and U1 treatments at the same nitrogen rate. The net profit and nitrogen recovery efficiency increased by 15.53–46.68% and 4.37–16.32%, respectively. Leaf photosynthesis and soil inorganic nitrogen also increased. Compared with the 100% BBF treatment, the 70% BBF treatments, with 30% reduced N, had similar effects on cotton growth. These results provide a scientific basis for highly efficient fertilization during cotton cultivation.

Effect of Nitrogen and Phosphorus Fertilizer Rates on Growth, Yield and Yield Components of Sun Flower Varieties

The experiment was carried out for two successive years (2017 and 2018) at to evaluate the effect of different levels of phosphorus and nitrogen fertilizer application on yield and yield components of sunflower. One released variety Oissa and two pipe lines Adadi- 1 and NK ferti; five fertilizer rates (F1= No fertilizer, F2= 11.5 kg N/ha &amp; 11.5 P2O5 kg/ha, F3= 23 kg N/ha &amp; 23 kg P 2 O 5 /ha), F4= 34.5 kg N/ha &amp; 34.5 kg P 2 O 5 /ha and F5= 46 kg N/ha &amp; 46 kg P 2 O 5 /ha ) were arranged in RCBD with factorial combination and three replication. The main effect of fertilizer rate significantly affected all yield and yield related traits except seed oil content at both locations. Oissa have almost the same seed yield response both sites with an average seed yield of 1653kg/ha and 1641 kg/ha respectively. The partial analysis result showed out of the five tasted fertilizer rates application of 34.5 kg N/ha and 34.5 kg P 2 O 5 /ha becomes profitable than others and can be recommended for sun flower production. This preferable fertilizer rate record high net benefit for all varieties but it needs a variety preference for locations. Using the same fertilizer rate, Adadi 1 and 'Nk fert' varieties gave high seed yield at Adadi than Holetta sites. Keywords: sunflower, variety, fertilizer rate, seed yield, seed oil DOI: 10.7176/JNSR/11-15-05 Publication date: August 31 st 2020

Nitrogen rate and source effects on foliar sugar, glycoalkaloid, and amino acid composition of potato Russet Burbank

The foliar chemicals in potatoes (Solanum tuberosum L.) could affect the growth and development of agricultural pests, such as Colorado potato beetle Leptinotarsa decemlineata (Say) and aphid Macrosiphum euphorbiae (Thomas). Thus, altering the chemical composition of potato leaves could potentially supplement integrated pest management (IPM). In this study, field experiments were conducted in Quebec, Canada, to investigate the effects of nitrogen (N) rate and source on foliar sugar, glycoalkaloid, and amino acid concentrations and tuber yield of potato cultivar Russet Burbank. Three N fertilizer sources of ammonium nitrate, ammonium sulfate, and polymer-coated urea were used at four rates of 60, 120, 200, and 280 kg N ha−1 plus an unfertilized control in a randomized complete block design. The fourth leaves from the top of 20 randomly selected plants in each plot were collected at 54, 68, and 82 d after planting for sugar, glycoalkaloid, and amino acid analysis. Tubers were collected at harvest, and the total and marketable yields were determined. Results showed that N fertilization linearly decreased sugar concentrations and these reduced sugars were conveyed and stored in tubers as starch. Glycoalkaloid concentrations in leaves were influenced by N source and rate. Both total and marketable yields quadratically varied with increasing N rates regardless of N sources, with average values of 36.4 and 28.3 Mg ha−1, respectively. As N rate affected potato foliar chemical composition and tuber yield, N fertilization could be considered as a supplemental tool to the IPM strategy for potato pest control.

Phosphorus application improved the yield of citrus plants grown for three years in an acid soil in the Three Gorges Reservoir Area

The objectives of the current study were to investigate the effects of nitrogen (N), phosphorus (P), and potassium (K) application rates on yield and quality of citrus fruits, and soil nutrient availability. The experiment was carried out using 8-year-old ‘Navelina’ navel orange (Citrus sinensis L. Osbeck) trees in an acid yellow sandy soil over three consecutive growing years in Zigui County in the Three Gorges Reservoir Area. This experiment consisted of 14 treatments with three factors (N, P, and K) and four levels of each factor. N application doses were 0, 66, 132, and 198 kg hm−2; P application doses were 0, 16.5, 33.0, and 49.5 kg hm−2; K application doses were 0, 27, 54, and 81 kg hm−2. P application at 49.5 kg hm−2 increased the yield of citrus by 32.6 % attributed to the increase in fruit number rather than mean fruit weight. P application did not affect total soluble solids of fruits when compared with the treatment without P application. Soil receiving 198 kg hm-2 of N rate revealed the lowest soil pH, which likely increased the toxicity of aluminum and then reduced citrus yield compared with the treatment without N fertilization. N and P application did not affect available N and available P in soils compared with treatments without N and P applications, respectively. We speculate that the increased fruit yield response of citrus trees by P fertilization is possibly due to aluminum detoxification as a result of phosphate complex with aluminum ions.

Effect of Nitrogen Rates and Leaf Clipping on Forage and Grain Yield, and Seed Quality of Transplant Aman Rice

Sustainable fodder production is difficult from limited cultivable land occupied for food grain production. This paper presents the results of the experiment designed to test the hypothesis that forage could be produced along rice grain from the same rice field. The aim of the present study was to investigate the influence of N-rates and leaf clipping on forage and grain yield; and seed quality of transplant Aman (wet season) rice. Four nitrogen (N) rates (N1=46, N2=69, N3=92 and N4=115 kg N ha-1) and four times of leaf clipping viz, C0=No leaf clipping, C1=leaf clipping at 25 DAT (Days after transplanting), C2=40 and C3=55 DAT were evaluated following split-plot design with three replications. BRRI dhan41 was used in the experiment. N rates, leaf clipping times and its interaction had significant effects on forage and grain yield, yield components and seed quality except thousand grain weight. The results revealed that forage yield increased with increasing N rates and leaf clipping times. Grain yield was higher in higher N rates and early leaf clippings, however, it was decreased in the late clipping (55 DAT). The highest mean grain yield (5.25 t ha-1) was obtained from the treatment combination of 115 kg N ha-1 (N4) and no leaf clipping (N4C0) which was statistically similar (5.18 t ha-1) to N3C0 (5.18 t ha-1), N3C1 (5.10 t ha-1) and N4C1 (5.06 t ha-1). The lowest mean grain yield (3.17 t ha-1) was obtained from N1C3. Grain yield was reduced by 3, 6 and 24% in C1, C2 and C3, respectively compared to C0 (No leaf clipping). Qualitative characters (germination and vigour index) of seed increased with increased N rates, however it decreased in the delayed leaf cuttings. Application of 92 to 115 kg N ha-1 with early leaf clipping (25 to 40 DAT) might be allowed to attain moderate forage yield, higher grain yield, and quality seed of transplant Aman rice.&#x0D; Bangladesh Rice j. 2019, 23(2): 49-57

Testing the effect of AQUASORB and nitrogen rates on yield, nitrogen and water use efficiencies of wheat and hydro-physical properties of soil in Sudan Savanna, Nigeria

The effect of supplementary irrigation (SI) rate and planting date on water use efficiency of potato (Solanum tuberosum L.) was conducted during the 2017 and 2018 cropping seasons at the Research Farm of the National Root Crops Research Institute (NRCRI) Kuru, Jos in Plateau State, Nigeria. The treatments consisted of two planting dates (2nd week of April, 2nd week of May) and four levels of water application (W1 = Control, W2 = SI of 200 m3 W3= SI of 400 m3, W4 = SI of 600 m3). The factors were combined to give 8 treatment combinations that were laid out in a 2×4 split plot arrangement in a Randomized Complete Block Design (RCBD) and replicated three times. Water use efficiency of potato was computed using formulae. Crop and water use efficiency data collected were subjected to Analysis of Variance (ANOVA. Planting of potato in April uses water more efficiently and also gave higher potato yield. Interaction effect of planting in April x 400 m3 SI gave higher water use efficiency of potato. It is recommended that potatoes should be planted in the second week of April and rainfall augmented with 400 m3SI rates, especially at the period of dryspell.

Effect of Nitrogen Fertilization Timing and Rate on Grain Yield and Quality of Durum Wheat Cultivar “Setodure”

Effect of Nitrogen Fertilization Timing and Rate on Grain Yield and Quality of Durum Wheat Cultivar “Setodure”