Relevant bibliographies by topics / Adequate/ inadequate fertilizer

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Academic literature on the topic 'Adequate/ inadequate fertilizer'

Author: Grafiati
Published: 4 June 2025
Last updated: 23 June 2025

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Journal articles on the topic "Adequate/ inadequate fertilizer"

1

Mvumi, Culver. "Assessing the Effect of Adequate and Inadequate Inorganic Fertilizer Rates on the Yield Levels of Paprika in Mutasa Resettlement Area, Manicaland Province, Zimbabwe." Greener Journal of Agricultural Sciences 3, no. 3 (2013): 199–203. https://doi.org/10.15580/GJAS.2013.3.011313374.

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A survey was carried out to evaluate the effect of adequate and inadequate inorganic fertilizer rates on the yield of Paprika (Capsicum annuum var. angulosum mill) in Mutasa resettlement area, Mutasa district. Questionnaires and interviews were used to produce primary data from 42 respondents in 2009. Secondary data was obtained mainly from Agricultural Technical and Extension Services (AGRITEX) and Paprika Company of Zimbabwe. Mean yields of paprika obtained from adequate and inadequate basal and top dressing fertilisers were compared and analysed using ‘Z’ statistical test at 0.05 level of significance. Mean yield from inadequate fertilizer rates of 30 farmers was 0.8 t/ha. The mean yield from adequate fertilizer rates of 12 farmers was 1.0t/ha. Results showed that the two means were significantly different. Adequate fertiliser rates produced significantly higher mean yield than the mean yield from inadequate fertiliser rates. The higher mean yield was enhanced by the highest number of (5) top dressing split applications. The study therefore recommends the use of adequate rates of 700 – 1 000 kg/ha basal fertilizer, 250 – 350 kg/ha ammonium nitrate (AN) and 350 – 400 kg/ha of potassium chloride. The top dressing has to involve 5 split applications. This exploits its high fruit yielding potential. Additional research is required to determine response of the crop, as a high value crop, to foliar and fertigation fertiliser application.
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2

RANJAN, KUMAR. "Effect of potassium levels on its fractions in soil under rice (Oryza sativa L.) cultivation." Annals of Plant and Soil Research 23, no. 2 (2021): 235–37. http://dx.doi.org/10.47815/apsr.2021.10066.

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It may be concluded from the results that the application of nitrogen and phosphorus without potassium (K) or inadequate K fertilizer application would cause greater mining of reserve soil K. Hence prior to crop production adequate K fertilizer application is needed.
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3

Sheoran, Parvender, O. P. Sheoran, and Virender Sardana. "Modeling Sunflower Productivity and Profitability in Relation to Adequate and Limited Sulphur Availability under Semiarid Irrigated Conditions." International Journal of Agronomy 2013 (2013): 1–4. http://dx.doi.org/10.1155/2013/738263.

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Inadequate and/or imbalanced fertilization has been identified as one of the critical bottlenecks holding oilseeds production and productivity. Sustainable production requires efficient use of inputs maintaining optimum yield and high quality product. The present study aims at defining the quantitative relationship between the fertilizer S applied and the sunflower yield obtained using a polynomial function. The analysis was done to allocate the S fertilizer for maximization of net profit over fertilizer cost depending on the availability of the fertilizer. The results indicated that the cost effective economically optimum dose of sulphur for sunflower cultivation was found to be 36.70 kg S/ha under its full availability. The expected sunflower yield at this dose was worked out to be 2.619 t/ha. However, it is advisable to uniformly distribute the fertilizer to all over the cultivable area under its limited availability for exploiting the desired yield potential and maximum net monetary returns.
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4

Yawson, David Oscar, Michael Osei Adu, Benjamin Ason, Frederick Ato Armah, Emmanuel Boateng, and Reggie Quansah. "Ghanaians Might Be at Risk of Inadequate Dietary Intake of Potassium." Journal of Nutrition and Metabolism 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/3150498.

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Adequate dietary intake of potassium (K) helps fight noncommunicable diseases (NCDs), mainly hypertension and cardiovascular diseases. This paper (i) estimated the K intake of Ghanaian population using food supply and food composition data and (ii) compared this estimate with the WHO recommended requirement for K in order to assess if there is a risk of inadequate K intake. Food supply data (1961–2011) was obtained from the FAO Food Balance Sheet (FBS) to derive trends in food and K supply. The average food supply in the FBS for 2010 and 2011 was used in assessing the risk of inadequate dietary intake of K. The K contents of the food items were obtained from food composition databases. The mean K supply per capita per day was approximately 856 mg. The assessment suggests a potentially large risk of inadequate dietary K supply at both individual and population levels. The results suggest the need for assessing options for managing K deficiency, including assessment of K supplying power of soils and K fertilizer management in food crop production systems, as well as empirical estimates of K content of food items (including those underreported in the FBS) and mixed diets in Ghana.
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5

Owolabi, Ilo Hammed, and Ayinde Yusuf Olarewanju. "Factorial Analysis on Varying Effect of Poulty Manure NPK Fertilizer on the Growth and the Yield of Maize Crop (Case Study of Eden Flows Global Resources Ltd Ilaro, Ogun State, Nigeria.)." International Journal of Research and Innovation in Applied Science X, no. I (2025): 244–58. https://doi.org/10.51584/ijrias.2025.1001020.

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When the soil fertility is inadequate, it leads to low productivity, which results to one of the factors hindering crop production in Nigeria. It has been attributed to planting of crop consistently without adequate artificial soil nutrient of farm inputs. However, the combination of chemical fertilizer and organic manure is regarded as one of solution to the problem. The treatment consists of NPK fertilizer with fresh weight of maize, NPK with dry weight of maize and NPK with seed yield maize. The factorial ANOVAL model is adopted for the analysis. The result indicates that Fcal(10.57) > Ftab(0.83) for the poultry manure and Fcal(1.54) > Ftab(0.83) for NPK Fertilizer, means that both contributes to the fresh plant weight of the maize, while Fcal(16.06) > Ftab(0.83) for poultry manure and Fcal(3.05) > Ftab(0.83) for NPK fertilizer respectively have a significance difference by contributing positively to plant seed yield of maize. Also, Fcal(0.308) < Ftab(0.83) for poultry manure and Fcal(0.135) < Ftab(0.83) for NPK fertilizer implies that there is no significance difference to dry plant weight. It shows that poultry manure and NPK fertilizer equally contributed significantly to the fresh plant weight of the maize and plant seed yield of the maize but does not contribute positively to the dry plant weight.
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6

Adejo, S.A, T.T. Amos, and D.O. Awolala. "Factors Influencing Choice of Adaptation Strategies to Climate Change by Yam Farmers in Nasarawa State, Nigeria." Continental Journal of Applied Sciences 19, no. 2 (2024): 35–50. https://doi.org/10.5281/zenodo.13239792.

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<em>This study seeks to determine factors influencing choice of adaptation strategies to climate change by yam farmers in Nasarawa state, Nigeria while the specific objectives were to examine the socio-economic characteristics of the respondents in Nasarawa states, Nigeria; identify factors influencing the choice of adaptation strategies by respondents in the study area; examine constraints to yam farming in the study area. Descriptive statistics, Multinomial Logistic Regression (MNL) and the Relative Importance Index (RII) were used to analyse the objectives. The study revealed a mean age of 51years and a mean yam farming experience of 37years. Respondents are literate and fertilizer is the major input for Yam production the study area. Yearly income, years of formal education, Household size and Educational level were the major factors influencing choice of adaptation strategies while Different planting dates (DPD), Cover cropping and Use of Inorganic fertilizers (UIF) were the major adaptation techniques been practiced. A Relative Importance Index of 0.78, 0.60, 0.55 and 0.58 indicates the major constraints to yam farming as Encroachment by Herders, Inadequate land, High cost of input and Changes in weather respectively. The study recommended that Government at all levels should be proactive in implementing the 1978 Land Use Act of Nigeria and Ranches for herders. This will provide adequate agricultural land for farmers as they desire to increase production but are constrained by the problem of inadequate land due to fragmentation and displacement due to Farmers/Herders crises. Also, adequate capacity building which will improve the farmers&rsquo; knowledge of appropriate mitigation strategy should be provided in order to mitigate the deleterious climate change effect experienced in their communities.</em>
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7

Mvumi, Culver. "Assessing the Effect of Adequate and Inadequate Inorganic Fertilizer Rates on the Yield Levels of Paprika in Mutasa Resettlement Area, Manicaland Province, Zimbabwe." Greener Journal of Agricultural Sciences 3, no. 3 (2013): 199–203. http://dx.doi.org/10.15580/gjas.2013.3.011313374.

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8

Onanuga, Adebusoye O., Roy Weasel Fat, and Roy M. Weasel Fat. "Growth and Yield of Corn, Carrot and Onion Treated With Rock Phosphate Organic Fertilizer Grown in Standoff Soil Southern Alberta, Canada." Journal of Agricultural Science 13, no. 3 (2021): 46. http://dx.doi.org/10.5539/jas.v13n3p46.

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An experiment was performed in Standoff, Southern Alberta to investigate resource cheap rock phosphate organic fertilizer application to corn, carrot and onion plots. The objective of the study was to ascertain effectiveness of rock phosphate organic fertilizer to support growth and yield of corn, carrot and onion crops grown in Southern Alberta. The varying levels of rock phosphate at 50 P kg/ha for Low P, 100 P kg/ha for High P and control were applied to corn, carrot and onion plots. These treatments were replicated three times, resulting into nine plants per crop. Agronomical parameters collected were subjected to analysis of variance using Duncan Multiple Range Test for separation of means. Result of the experiment indicated that Low P and High P favoured corn height and number of leaves but did not support other parameters measured due to inadequate rock phosphate applied. It was observed that rock phosphate influenced residual level of P after harvest of corn, carrot and onion. Onion plots had the highest P left in the soil than corn and carrot plots. This studies showed potential of rock phosphate in crop production, if apply in adequate amount and availability of soil moisture, as well as high residual P in the soil after harvest.
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9

Idiku, F. O. "Training Needs of Women Vegetable Farmers in the University of Calabar Farm, Nigeria." Direct Research Journal of Agriculture and Food Science 7, no. 6 (2019): 137–40. https://doi.org/10.5281/zenodo.3242020.

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A two stage sampling technique was employed to select 60 respondents (women vegetable farmers). A well structured questionnaire was used to obtained primary data while the data obtained were analyzed with the use of simple frequencies and percentages while the relationship between their socioeconomic status and training needs were analyzed with Chi-square statistics. The socio-economic characteristics of the respondents show&nbsp;that 48.3% of the respondents were in the age bracket of 41-50 years, 50% of the respondents attained secondary education and 75% had between 5-10 children meaning that labor supply might be adequate. Farm size showed that 41.7% of the respondents had between 0.5 and 0.6 hectares of farmland and income earning showed that 26.7% of the respondents earn between N 75,000- N 99,000 per annum which is grossly inadequate. However, majority 82.10% of the respondents indicated not having access to extension services while areas of training needs identified include pest and diseases control methods, fertilizer application, fertilizer selection/rate, storage methods and procedure. Preference given to progressive farmers was one of the major factors affecting training needs while age, farm income and farming experience all show significant relationship with training needs. Recommendation was made that extension services should be made available to respondents to improve their farming knowledge and skills through necessary training as well as provision of credit facilities.
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10

Nhunda, Daniel M., Johnson M. Semoka, and Tindwa Hamisi. "Assessment of Soil Fertility Status in Selected Fields under Maize Production in Kongwa District, Dodoma Region, Tanzania." Journal of Agriculture and Ecology Research International 25, no. 1 (2024): 32–47. http://dx.doi.org/10.9734/jaeri/2024/v25i1570.

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This study was conducted in the Kongwa District to assess the fertility status of soils of the selected fields under maize production to understand fertility variability among soils and recommend appropriate fertilizer rates. The study involved randomly selected 24 maize fields. Composite soil samples were collected in these fields at 0–20 cm deep and characterized for soil fertility status. Results indicated that 48% of the soils were sandy clay loam and 26% were sandy loam. The remaining fields had clay or loamy sand textural classes. The soil pH ranged from extremely acidic (3.52) to moderately alkaline (7.7), organic carbon ranged from very low to medium (0.19-1.60%) and total N were very low to low (0.01-0.15%). Also, results indicated that 42% of soils had P deficiency and 16.7% had inadequate S levels. In addition, 45.8% of the soils had inadequate exchangeable K and exchangeable Mg levels ranged from very low to high (0.29-4.06 cmol(+) kg-1). Exchangeable Ca was low to very high (1.06 to 10.04 cmol(+) kg-1) with favourable base saturation for crop production. The CEC ranged from very low (2.62 cmol(+) kg-1) to medium (18.9 cmol(+) kg-1). Extractable micronutrients such as Cu, Fe, and Mn were adequate but Zn was inadequate in 58% of the soils. Categorizing nutrient status in soils of the study area showed that fertility is poor regarding N, P, K, Zn, Mg, and Ca. Hence, the studied soils need external nutrient inputs and proper management to optimize crop production.
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Conference papers on the topic "Adequate/ inadequate fertilizer"

1

Karlsons, Andis, Anita Osvalde, and Laura Abolina. "NITROGEN AND PHOSPHORUS EFFECT ON AMERICAN CRANBERRY GROWTH, YIELD AND MINERAL ELEMENT COMPOSITION." In 22nd SGEM International Multidisciplinary Scientific GeoConference 2022. STEF92 Technology, 2022. http://dx.doi.org/10.5593/sgem2022/3.1/s13.33.

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The industrial cultivation of American cranberry (Vaccinium macrocarpon Aiton) in Latvia was started during last 20 years with total plantings of more than 125 ha today. As a native wetland plant, commonly cranberries grows on poor, acid soils and are characterized as nutrients low requiring crop, however, balanced plant nutrition is vitally important to realize the full potential of cranberries as crop, to ensure adequate growth and yield production. Previous results obtained by authors from different cranberry producing plantings in Latvia frequently showed inadequate cranberry tissue supply with N and P. A field trial were established to examine the impact of N and P fertilizer rates on cranberry yield, fruit quality, morphological factors, and mineral element supply. Field experiments on cranberry cultivar �Bergman� were conducted during 2019 cropping season in a commercial plantation established on an excavated peat bog in Latvia. The cranberries received five levels of N (0 to 40 kg N ha-1) and P (0 to 30 kg P ha-1) as well as N and P treatment combinations applied in spring. Cranberry leaf analyses and soil (peat) testing were used as a diagnostics tool to reveal nutrient (N, P, K, Ca, Mg, S, Fe, Mn, Zn, Cu, Mo, B), soil pH and EC status. In general, crop characters were significantly influenced by different levels of N and P. As expected, the results showed that combined N and P treatments with the highest rates: N30/P20 and N40/P30 resulted in the highest yields and yield parameters, as well as ensured optimal N and P concentrations in cranberry tissues. It should be noted that the rates of applied fertilizers were environmentally safe as the nutrient concentrations recommended for peat growing medium were not exceeded.
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