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 10 of 10 for “"N fertiliser"”.
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Effect of replacing nitrogen fertiliser with gibberellic acid on response of perennial ryegrass and white clover pasture : A thesis submitted in partial fulfilment of the requirements for the Degree of Doctor of Philosophy at Lincoln University
… allowed to use high rates of nitrogen (N)-based fertiliser to achieve maximum pasture production due to the associated losses of N through nitrate leaching and nitrous oxide emissions. Gibberellic acid (GA), a naturally occuring phytohormone, has shown in short term studies, to increase, then …
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The release of nitrogen and carbohydrate from herbage during comminution
… explored the effect of increasing rates of N fertiliser application (0, 100, 200 and 350 kg N/ha/y) on herbage characteristics and release of N. Herbage was collected from swards of perennial ryegrass, lucerne, chicory and plantain in May (autumn) and November (spring) 2015. Increasing N …
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Optimising durum wheat yield and quality
… To do this the effects of different N fertiliser treatments on the yield and quality of 'CRDW17' and 'Waitohi' durum wheat were examined. Grain was produced from field experiments established at Darfield, Lincoln and Wakanui with a total of six N treatments applied early (tillering) and …
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Dietary crude protein and nitrogen utilisation in two contrasting dairy systems : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Animal Science, School of Agriculture and Environment, Massey University, Palmerston North, New Zealand
… HIPS. The lower MY along with the 35% higher N fertiliser applied on LIPS produced a higher N surplus per ha causing higher N losses when compared to HIPS. Despite the higher feed costs of HIPS, profitability was 16% higher because of milking more cows with higher MY when compared to LIPS.
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White clover inclusion in intensive dairy production systems
… clover inclusion increased herbage production at fertiliser application rates of up to and including 180 kg N/ha/year in the plotbased study described in chapter 4 of this thesis. The results from this demonstrated the negative relationship between increasing N fertiliser application rates and …
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From field-to-glass: optimising field beans (<i>Vicia faba </i>L.) and peas (<i>Pisum sativum</i> L.) for brewing and distilling
… their ability to satisfy their entire nitrogen fertiliser requirement through the natural process of biological nitrogen fixation (BNF). To this end, the potential of utilising legumes, when grown as a mixed crop (intercrop, IC), to support traditional cereal crops was evaluated. The suitability …
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The influence of cultivar and environment on the relationship between flour protein content and grain yield in wheat
… were created with four levels of nitrogen (N) fertiliser (0, 100, 200 and 400 kg N ha⁻¹) and two plant densities (125 and 500 plants m⁻²). Each N level was split equally between Zadoks growth stages 22, 30 and 39. Grain yields differed between cultivars. Heavy grain yields were mainly …
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Changes in δ¹⁵N in pastoral soils under varying management intensity
… (4–57 year) grazed field trials with different fertiliser or irrigation regimes. Three of the forest-to-pasture chronosequences were on pumice soils where pine forests had been converted to dairy pastures. The fourth chronosequence was on a podzol soil in Northland, where native scrub had been …
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Effect of urinary nitrogen, dairy shed effluent and nitrogen fertiliser on nitrate leaching from a pasture soil
… solely on single nitrogen (N) sources (e.g. fertiliser. urine, dung or effluent). Under grazed pasture, however, more than one N source is usually returned to the system either directly or indirectly. Therefore it is important to improve our knowledge and understanding of the concentrations, …
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Evaluation of perennial ryegrass cultivars for dairy production under different pasture management
… with irrigation and the annual nitrogen (N) fertiliser application rate was 325 kg N/ha. Compared with diploid cultivars, the tetraploid cultivars, Base and Bealey, had less dead material proportion (16.0% vs. 18.0% at the pre-heading vegetative stage; 22.0% vs. 27.0% at post-flowering …