The Grail theorem prover: Type theory for syntax and semantics

As the name suggests, type-logical grammars are a grammar formalism based on logic and type theory. From the prespective of grammar design, type-logical grammars develop the syntactic and semantic aspects of linguistic phenomena hand-in-hand, letting the desired semantics of an expression inform the syntactic type and vice versa. Prototypical examples of the successful application of type-logical grammars to the syntax-semantics interface include coordination, quantifier scope and extraction.This chapter describes the Grail theorem prover, a series of tools for designing and testing grammars in various modern type-logical grammars which functions as a tool . All tools described in this chapter are freely available

Caucasian Clover is More Productive Than White Clover in Temperate Pastures

White clover (wc) (Trifolium repens) is present and is often the dominant legume in the \u3e11 m ha of grassland in New Zealand (NZ). However, wc has limitations and normally contributes less than 20% of total annual pasture dry matter (DM) production. The use of a wider range of legume species is one way to increase legume percentage in wc/grass pastures. Caucasian (Cc) or Kura clover (Trifolium ambiguum) is a persistent legume which is slower to establish than wc but can increase total legume production (Cc plus volunteer wc) and hence N2 fixation and animal productivity. This paper compares the productivity of Cc and wc in irrigated and dryland environments, and relates their relative establishment success to differences in seedling development

Net Photosynthesis Rate and Chlorophyll Content of Caucasian and White Clover Leaves Under Different Temperature Regimes

In spring and summer in intensive temperate pastures, Caucasian clover (Cc) (Trifolium ambiguum) has higher dry matter (DM) production rates than white clover (wc) (Trifolium repens) (Black et al., 2003). An examination of the physiological basis for these differences can provide a greater insight into the suitability of Cc for inclusion in temperate pastures. Specifically, leaf photosynthesis rate is a major driver of seasonal growth and is strongly regulated by temperature and chlorophyll content. This study aimed to compare the net photosynthesis rate (Pn) and chlorophyll content of Cc and wc leaves under different temperature regimes

Effect of rate and method of phosphorus application on the growth and development of 'Pasja' crops

‘Pasja’ (Brassica campestris x napus) was grown at Lincoln in 2008, with banded or broadcast phosphorus (P) fertiliser applied at 0, 20, 40 or 60 kg/ha at establishment on a Templeton silt loam soil of moderate fertility (Olsen P of 9-17 mg/ kg range for individual plots). Total dry matter (DM) production, leaf to stem ratios and leaf area development were measured over time and related to the biophysical environment. Final DM yield increased with P rate from 3,730 kg DM/ha for the control to ~5,000 kg DM/ha at 60 kg P/ha. The leaf to stem ratio declined from between 22 and 31 at 17 days after emergence to 10.3 at the final harvest. Leaf area index (LAI) for the control crops was lower than for those that received P fertiliser, but there were no differences among the P fertilised crops. Total accumulated intercepted solar radiation (RIcum) was 8% greater when P was applied compared with the control. This difference was the main contributor to differences in total dry matter yield and was independent of the application method. Keywords: BrassicaPastoral 21’ program and New Zealand Institute for Plant & Food Limited

Clover species cover on summer dry hill country in Central Otago

The prevalence of annual clover species and white clover (Trifolium repens) during the critical late winter to early summer period (mid Aug – Dec) are compared in relation to aspect, altitude, temperature and rainfall on Mt Grand at Hawea Flat. Measurements were at four north facing sites (450, 620, 750, 910 m a.s.l.) and one shady site at 630 m a.s.l. The rainfall was similar for all altitudes and aspects but annual clovers dominated on sunny faces and the perennial white clover dominated on the shady face with suckling (T. dubium) the only adventive annual clover present. Annual cluster clover (T. glomeratum) dominated on the lower sunny faces at 450 and 620 m and sub clover (T. subterraneum) dominated at 750 m. Suckling and striated clover (T. striatum) were present on all sunny aspect sites and were unaffected by altitude while haresfoot (T. arvense) presence increased with altitude. Air thermal time accumulation for the mid Aug-Dec period was 1440 °Cd at the 450 m site and declined at 100 °Cd per 100 m of elevation (r² = 0.99). Thermal time at 910 m was <1000 °Cd and may limit seed production of some annual clover species at or above this altitude. The dominance of adventive annual clovers on the sunny aspects indicates areas that are probably suitable for introduction of improved annual species such as balansa clover (T. michelianum) or modern cultivars of sub. Productivity of perennial white clover which has persisted on the shady faces may be increased by more intensive grazing management

Changes in New Zealand red meat production over the past 30 yr

Implications • Consumer attitudes globally and nationally influence pasture production systems in New Zealand. • New Zealand red meat production has decreased its environmental footprint per unit of production over the last 30 years. • The national ewe flock has halved but gains in animal production have maintained similar levels of meat production. • Meat production has been improved through increased lambing percentages and lamb growth rates on fewer but larger farms. • Greater animal production has been supported through improved pastures with an emphasis on their legume component which has increased lamb growth rates and reduced methane emissions per unit of product

Potential Yield of Cocksfoot (\u3ci\u3eDactylis Glomerata\u3c/i\u3e) Monocultures in Response to Irrigation and Nitrogen

Cocksfoot is a widely sown grass in temperate pastures. However, while potential yield of cocksfoot can exceed 28 t DM/ha per year, it is often restricted by water, temperature and nitrogen (N). Of these, Peri et al. (2002) showed that N was severely limiting in all seasons. The aim of this study was to confirm the potential yield of cocksfoot and quantify the extent of yield reductions due to environmental constraints

Optimizing Yield and Quality of Orchardgrass Pasture in Temperate Silvipastoral Systems

The objective of this study was to provide grazing management recommendations for a silvipastoral system by determining the effects of shade and nitrogen (N) on the pattern of dry matter accumulation and nutritive value of orchardgrass (Dactylis glomerata) in a subhumid temperate environment. Orchardgrass in open pasture (100% transmittance) and under 10 year old Pinus radiata tree shade (60% transmittance) at 200 stems/ha was used as the main plot and nitrogen (0 and 300 kg N/ha as synthetic urine) was the subplot factor. Dry matter (DM) production of orchardgrass in the first 60-day spring rotation was similar in open and shade conditions (2.6 t/ha) but approximately doubled by the application of N. In the 60- day summer rotation, DM production was about 22% lower in the shaded plots and was increased by about 60% by the addition of N. Crude protein and organic matter digestibility declined with herbage age and the onset of reproductive tiller growth. It was concluded that to maximise DM production without compromising pasture quality, grazing management of orchardgrass should be similar in open and shaded pastures in spring (30-35 day regrowth) but a shorter regrowth length used for open (20 days) than silvipastoral (25-30 days) systems in summer

Pasture Improvement Needs and Options for New Zealand Sheep and Beef Farms

In recent years in New Zealand, sheep and beef farming has been outcompeted for prime land. This means that the government and industry targets to increase sheep and beef production have to be achieved on farms with significant constraints on pasture production. They are increasingly restricted to hilly and other locations with variable climates and soils, and landscape constraints on farming practices. Thus there are limits on the ability to improve pasture production – whether by pasture renewal or through means like grazing management, fertiliser use, or weed and pest control

Refining foliage sampling protocols for white clover

White clover (Trifolium repens) foliar ‘grab’ samples were taken pre-grazing from two irrigated experiments at Lincoln University at ~6-week intervals from August 2019 to May 2021. Clover leaves were divided into lamina and petiole before analysis. Results for nitrogen (N), phosphorous (P), potassium (K) and sulphur (S) foliar concentrations are reported. While there were seasonal variations, N% and S% were consistently higher in the white clover lamina than the petiole, K% was higher in the petiole, and P% was higher in the lamina. With increasing clover sward height, the lamina to petiole DW ratio declined from 4:1 at a sward height of 5 cm, to 1:1 at 25 cm. The lamina+petiole sample had lower concentrations of N and S than lamina alone. Over time, foliar N% was relatively stable but concentrations of P, K and S showed ~two-fold variation and may have been affected by low soil moisture. Clover nutrient status should be based on lamina-only samples taken during spring, when plant growth is fastest, and just prior to grazing when there is sufficient herbage. Clover foliage sampling should routinely be used to inform fertiliser recommendations rather than relying on soil tests or visual symptoms of nutrient deficiency