To measure the impact of biological control of Argentine stem weevil, Listronotus bonariensis (ASW) by Microctonus hyperodae in dairy pasture, a research site was established in the autumn of 1997 on a dairy farm near Lincoln, where the parasitoid had been present since 1994. Existing pasture was killed with glyphosate and four ryegrass cultivar treatments consisting of three perennial (Nui, Em...

Abstract A 15 N tracing pot experiment was conducted using two types of wood-based biochars: a regular biochar and Kon-Tiki-produced nutrient-enriched biochar, at application rates (1% 5% (w/w)), in addition to fertilizer only control treatment. Ryegrass sown pots, all which except controls received N-labelled as either NH 4 NO 3 or . We quantified the effect on soil 2 O emissions, well fate fe...

Modifications in the structure of grasslands have been responsible for decline several avian species due to a reduced quality available habitat. Currently, applications herbicide glyphosate introduced promote winter forage production Flooding Pampas Argentina. Rotational grazing has another technique used production. Here, we evaluated different managements cattle systems on richness, compositi...

The development of ecological circular agriculture has been highly encouraged to recycle agricultural wastes, reduce mineral fertilizer input, and protect the environment. Biogas slurry (BS), a by-product biogas production generated from anaerobic digestion animal waste crop residues, is often considered substitute input. Being cheap source organic matter plant nutrients, its application may im...

This study evaluated the effects of calf management system following early-weaning (EW) on performance of beef steers. On d 0, Brahman x British steers (n = 40; bodyweight [BW] = 198 ± 26 lb; age = 72 ± 14 d) were stratified by age and BW, and randomly assigned to normal-weaning (NW; d 177) or 1 of 3 EW treatments: 1) EW and grazed on ryegrass pastures for 67 d then on bahiagrass pastures until...

1. Two experiments are described in which kinetic aspects of calcium metabolism were studied in housed lactating sheep consuming different fresh herbage species. The importance of protein supply was also investigated. 2. In Expt. 1, two groups (n 4) were offered, ad lib., a freshly cut ryegrass (Lolium perenne L.)-white clover (Trifolium repens L.) pasture containing 5.48 g Ca/kg dry matter (DM...

Adaptation and Establishment Meadow fescue prefers deep, rich soils, and while surviving in wet soils, it cannot tolerate flooding. It will survive under dry conditions but is more sensitive to drought than many other grasses. It can be grown in areas suitable for timothy, and is considerably more winter hardy than tall fescue in northern environments. Meadow fescue is closely related to both t...

Rhizoremediation uses root development and exudation to favor microbial activity. Thus it can enhance polycyclic aromatic hydrocarbon (PAH) biodegradation in contaminated soils. Spatial heterogeneity of rhizosphere processes, mainly linked to the root development stage and to the plant species, could explain the contrasted rhizoremediation efficiency levels reported in the literature. Aim of th...

The fungal genus Rhynchosporium (causative agent of leaf blotch) contains several host-specialised species, including R. commune (colonising barley and brome-grass), R. agropyri (couch-grass), R. secalis (rye and triticale) and the more distantly related R. orthosporum (cocksfoot). This study used molecular fingerprinting, multilocus DNA sequence data, conidial morphology, host range tests and ...