Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"NPK fertilizer"”.
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The effects of biochar and NPK fertilizer on maize performance and selected soil nutrient levels
… was to determine the effects of biochar and NPK fertilizer on maize performance and selected soil nutrient levels. A 3x2 factorial experiment was conducted at the School of Agriculture Experimental Farm for two consecutive seasons (2015/16 and 2016/17 seasons). Treatments consisted of biochar …
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An Improved Understanding Of Phosphorus Dynamics And Fertility Management In Forage Production Systems
… nutrient application (112 kg ha⁻¹ of 19-19-19 NPK fertilizer) across 19 forage types. Profitability increased with fertilization only in mixed grass-legume stands due to high nitrogen costs for grass-only stands. The overall findings highlight the importance of soil properties (e.g., SOC, …
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Timing matters: Responses of a mesic old-field meadow to global change manipulations differed after five versus 13 years
… and water additions), nutrient availability (NPK fertilizer additions), and herbivory (herbivore exclosures) were initiated in 2010 on 240 1 m2 plots (n = 20). Species biomass was harvested from 120 plots in 2023 and compared with corresponding data from the other 120 plots that had been …
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Effect of NPK basal fertilizer, nitrogen top dressing and season on growth and yield of Cucurbita argyrosperma
… of this study was to investigate the effect of NPK basal fertilizer, nitrogen top dressing and seasonal variation on the agronomic traits of C. argyrosperma. Plants were grown at 0; 150; 300 and 450 kg ha-1 NPK basal fertilizer and 0; 150 and 300 kg ha-1 nitrogen top dressing during warm and …
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Carbon dioxide emissions from selected soils in Zambia : effects of nitrogenous fertilizer and agricultural lime.
… the effects of applying agricultural lime and an NPK fertilizer on CO2 emissions from soils and to identify soil properties that have a significant influence on soil organic carbon (SOC) contents and on soil organic carbon mineralization. Soil samples collected from surface horizons of cultivated …
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Synthesis of zeolites and their application as soil amendments to increase crop yield and potentially act as controlled release fertilizers.
… cation exchange capacity (CEC) and slow-release fertilizer properties. Most work on slow-release fertilizers has focused on natural Clinoptilolite, Phillipsite and Chabazite. The aim of this study was to synthesize zeolites, study their effectiveness as soil amendments and their ability to act as …
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The use of rockdust and composted materials as soil fertility amendments
… communities in direct comparison with chemical fertilizer and farmyard manure. There were annual applications of compost, manure and chemical fertilizer in spring with one rockdust application in the autumn prior to the first year of the trial. Two harvests were carried out each year in summer …
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Biomass Crops in Marginal Lands.
… 0, 9 and 18 dS m-1) and three levels of NPK fertilizer (F0, F1 and F2, respectively 0, 60 and 120 kg NPK ha-1), were replicated three times in a completely randomized experimental design. During the crop cycle and at harvest, the soil electrical conductivity (EC), physiological (net …