摘要:

The utilization of Scottish hill‐land potential is severely limited by inadequate wintering facilities resulting from a low proportion of inbye land to hill‐land. The machair lands of the Uists, in the Outer Hebrides, however, provide a more suitable ratio, which is not commonly found in the Highlands of Scotland.Investigations into the grassland problems of the Hebrides were intensified in 1955; and some of the data obtained from trials are given here, as are suggestions for improving the production and utilization of grass in these areas. The climate, soil, and agricultural system all interact to provide conditions which are rarely seen elsewh

ISSN:0142-5242    

DOI:10.1111/j.1365-2494.1959.tb01021.x

出版商:Blackwell Publishing Ltd    

年代:1959

数据来源: WILEY

ISSN:0142-5242    

DOI:10.1111/j.1365-2494.1959.tb01022.x

出版商:Blackwell Publishing Ltd    

年代:1959

数据来源: WILEY

摘要:

Ecological studies ofPoa annuapopulations in turf using the core sampling method conducted over a period of several years showed thatPoa annuawas able to produce seed under frequent mowing at 1/2 to 3/4 of an inch. The population the second winter after seeding into Bermuda Grass turf was as high as that of the first.High soil moisture maintained by frequent light irrigations favoured its persistence in Bermuda Grass turf during the summer months.Matted Bermuda Grass turf which was lightly renovated in November contained a higher winter population ofPoa annuathan the non‐renovated. Significantly denser populations were found in turf mowed at 1/2 to 3/4 of an inch than in turf mowed at 3 inches.Perennial prostrate growing strains were selected which could be readily propagated vegetatively and persisted in field plots for two to three years when clipped at 1/4 inc

ISSN:0142-5242    

DOI:10.1111/j.1365-2494.1959.tb01023.x

出版商:Blackwell Publishing Ltd    

年代:1959

数据来源: WILEY

摘要:

Four varieties of perennial ryegrass are compared throughout the seeding year and the first four harvest years (1954–58). Two of the varieties, Irish ‘commercial’ and New Zealand, are of ‘early’ type; and the others, Glasnevin and S23 are, ‘late’.New Zealand gave the most grazing, 1% more than ‘commercial’ and Glasnevin, and 5% more than S23.The ‘early’ varieties contrasted markedly with the ‘lates’ in seasonal growth.In persistency and in resistance to invasion by unsown species, the ‘lates’ were better than the ‘earlies’ S23 was outstanding, and New Zealand had an advantage over ‘commercial’. The ‘earlies’ were the more compatible with clover.New Zealand appears to have most merit, but sowing of more

ISSN:0142-5242    

DOI:10.1111/j.1365-2494.1959.tb01024.x

出版商:Blackwell Publishing Ltd    

年代:1959

数据来源: WILEY

ISSN:0142-5242    

DOI:10.1111/j.1365-2494.1959.tb01025.x

出版商:Blackwell Publishing Ltd    

年代:1959

数据来源: WILEY

摘要:

The changes in chemical composition during haymaking, the loss of nutrients in the field and during storage, and the nutritive value of swath‐cured and tripoded hay were compared. In good weather no advantage was gained by tripoding the hay. The nutritive value of the hays made by the two methods was similar and the loss of dry matter in the field slightly lower in the swath‐cured hay. In a bad season, however, the nutrient loss in the swath‐cured hay greatly exceeded that occurring in the tripoded hay and the starch equivalent, as shown by the results of digestibility trials, was markedly lower for the swath

ISSN:0142-5242    

DOI:10.1111/j.1365-2494.1959.tb01026.x

出版商:Blackwell Publishing Ltd    

年代:1959

数据来源: WILEY

摘要:

SUMMARYThe object of the trial was to obtain information on productivity and persistence of 10 selected lucerne varieties subjected to a regular cutting treatment at an early and a very early stage of growth.The trial was established on the Company's land at Walsingham, Norfolk. The soil of the trial plots consisted of sand‐loam topsoil (pH 6.9) and coarse sand subsoil (pH 7.5

ISSN:0142-5242    

DOI:10.1111/j.1365-2494.1959.tb01027.x

出版商:Blackwell Publishing Ltd    

年代:1959

数据来源: WILEY

摘要:

Studies of seed development and yield were conducted on three Aberystwyth varieties of timothy. The stages of seed development are described, as are their correlation with the external appearance of the head. Evidence is presented to support the suggestion that the latitude in the dale of harvest is greater than has hitherto been accepted. Population studies of seed crops have revealed that the abundant small heads (less than 4 cms. in length) contribute very little to the yield. The partition of the yield amongst the different inflorescence age‐groups is given for each variety and methods of judging crop ripeness are discusse

ISSN:0142-5242    

DOI:10.1111/j.1365-2494.1959.tb01028.x

出版商:Blackwell Publishing Ltd    

年代:1959

数据来源: WILEY

摘要:

Cutting experiments on the spring growth of a stand of Provence lucerne, the first year of which were described in a previous paper (1), were continued For a second and third season.The value of taking the first cut at the early bud stage, particularly in an unfavourable season, was confirmed.No adverse effects were observed in the crop after three seasons of this treatment and yields were satisfactory in the third year.Similar cutting experiments were made on the second growth of an area of Du Puits lucerne after the spring growth had been cut uniformly at the early bud stage.The curves for protein and fibre production were similar to those for the first growth but the crop matured more quickly and yields were lower.No further advantage was observed in cutting the second growth before the flower stage although earlier cutting produced no apparent ill‐effect on the plant or upon subsequent yiel

ISSN:0142-5242    

DOI:10.1111/j.1365-2494.1959.tb01029.x

出版商:Blackwell Publishing Ltd    

年代:1959

数据来源: WILEY

摘要:

Normal‐acid fibre content has been suggested as a useful indication of the digestibility of herbage. The changes in fibre content were therefore recorded during the spring and early summer of 1957 and 1958 to see whether regular differences occurred between species and varieties of herbage grasses.All species showed an increase in fibre content during spring and early summer, but considerable year‐to‐year fluctuations occurred: fibre content was also influenced by manuring and spacing. Regular differences between species and varieties have been detecled and, in perennial ryegrass, differences between individual genotypes. It should be possible to select breeding material for high or low fibre content if req

ISSN:0142-5242    

DOI:10.1111/j.1365-2494.1959.tb01030.x

出版商:Blackwell Publishing Ltd    

年代:1959

数据来源: WILEY