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Soil phosphorus dynamics and bioavailability in New Zealand forest ecosystems
(Lincoln University, 2013)
Phosphorus (P) is an essential element for all living organisms and the productivity of natural and managed ecosystems is generally limited by the bioavailability of P in soil. Previous studies showed that significant ...
Liming effects on legume production and phosphorus availability in acid South Island hill and high country soils : A thesis submitted in partial fulfilment of the requirements for the Degree of Doctor of Philosophy at Lincoln University
(Lincoln University, 2019)
There is large potential for widespread development and increased production in South Island hill and high country by increasing legume production. Despite regular past applications of superphosphate fertiliser, current ...
Effects of carbon substrate and irrigation on carbon dioxide emissions and denitrification for three grassland soils : A thesis submitted in partial fulfilment of the requirements for the Degree of Doctor of Philosophy at Lincoln University
(Lincoln University, 2019)
Conversion of non irrigated grassland to high−intensity farm systems with irrigation is a major land−use change to enable a higher yield year−round in New Zealand. Research is needed to better understand the links between ...
Effect of climate/soil moisture content on aluminium toxicity and carbon stocks of two high country soils under glasshouse conditions
(Lincoln University, 2015)
Aluminium (Al) toxicity is a key factor limiting pasture production in the high country of New Zealand. Many high country soils are acidic, with a pH less than 5.5. Low soil pH makes Al soluble, leading to high concentations ...
The quid pro quo of dissolved organic matter biodegradability in agricultural soils: investigations of quantitative and biochemical aspects : A thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy at Lincoln University
(Lincoln University, 2019)
Dissolved Organic Matter (DOM) serves as a primary source of mineralizable carbon (C), nitrogen (N), and other macroelements for plants and soil microbiota, acting as a linchpin of nutrient dynamics and energy flows through ...
The effect of winter grazing and a nitrification inhibitor on nitrous oxide emissions and denitrification in a stony soil
(Lincoln University, 2015)
Intensive grazing of forage crops by dairy cows is common practice during the winter months in the Canterbury region of New Zealand. Such intensive grazing on wet soil increases the risk of denitrification and the production ...
The effects of organic matter, pH, and dissolved ligands on the mobility of cadmium in soils : A thesis submitted in partial fulfilment of the requirements for the Degree of Doctor of Philosophy at Lincoln University
(Lincoln University, 2020)
The fate of cadmium (Cd) in soil is important because of its toxicity even at low concentrations. Mobilisation of Cd to soil below the root zone can decrease Cd accumulation in topsoil where plants take up available Cd. ...
Investigations of soil extractable aluminium and toxicity in New Zealand soils : A thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy at Lincoln University
(Lincoln University, 2018)
Soil acidity and associated soil aluminium (Al) toxicity severely restrict the establishment, yield and persistence of legumes in New Zealand high and hill country pastures. There is an urgent need to identify soils which ...
Nitrous oxide fluxes, soil oxygen, and denitrification potential of urine- and non-urine-treated soil under different irrigation frequencies
(American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, Inc., 2016-07)
© American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America. 5585 Guilford Rd., Madison, WI 53711 USA. All rights reserved. Despite increased use of irrigation to improve forage ...
Soil pH, exchangeable aluminium and legume yield responses to deep-placed lime at Omarama Station
(New Zealand Grassland Association, 2018-11-17)
The passive moment of lime down the soil profile in dryland is slow so a machine was developed to directly inject lime into soil, and was tested it at Omarama Station. Pelleted lime was injected at simultaneous depths of ...