A GRASS-ALFALFA MIXTURE COMPARED WITH CEREAL GRAINS FOR FODDER PRODUCTION UNDER SEMI-ARID CONDITIONS

1961 ◽  
Vol 41 (4) ◽  
pp. 799-804 ◽  
Author(s):  
M. R. Kilcher ◽  
D. H. Heinrichs
Keyword(s):  
Arid Climate ◽  
Cereal Grains ◽  
Cereal Crop ◽  
Perennial Crop ◽  
Forage Crops ◽  
Arid Conditions ◽  
Fodder Production ◽  
Semi Arid

From 1952 to 1960 at Swift Current, Saskatchewan, the performance of a grass-alfalfa mixture was compared to that of oats and of wheat on dryland, principally from the standpoint of hay production. Average annual hay yields over the 9-year period were similar, but within single years large differences in yield occurred between crops. In seasons with favourable precipitation the perennial forage mixture gave higher hay yields, while the cereals gave the highest yields during very dry seasons.Small yields from the perennial crop were associated with low rainfall in May. It was concluded that perennial forage crops should be the main source of winter feed in a semi-arid climate, if used in conjunction with a cereal crop for insurance.

PERENNIALS AND ANNUALS FOR WINTER FODDER PRODUCTION IN THE DRIER PORTIONS OF THE CANADIAN PRAIRIES

1978 ◽  
Vol 58 (4) ◽  
pp. 1081-1085 ◽  
Author(s):  
M. R. KILCHER
Keyword(s):  
Crude Protein ◽  
Cereal Grains ◽  
Semiarid Region ◽  
Forage Crops ◽  
Canadian Prairies ◽  
Row Crops ◽  
Perennial Crops ◽  
Annual Crops ◽  
Fodder Production

Small grain cereals such as oats or wheat, when grown on fallowed land, provided fodder yields as high as or higher than those obtained from perennial forage containing alfalfa. However, on a land base comparison, yields of perennial crops were about double those of cereal grains. A 3-yr rotation using annuals in a crop–crop–fallow sequence improved the yield relationship over a crop–fallow rotation only marginally in this semiarid region. Yields of corn or sunflower row crops in rotations with fallow, or with cereals and fallow, were highly variable. Crude protein yields of the perennial forage crops on a given land base were about threefold those from annual crops.

THE USE OF CEREAL GRAINS AS COMPANION CROPS IN DRYLAND FORAGE CROP ESTABLISHMENT

1960 ◽  
Vol 40 (1) ◽  
pp. 81-93 ◽  
Author(s):  
M. R. Kilcher ◽  
D. H. Heinrichs
Keyword(s):  
Cereal Grains ◽  
Cereal Crops ◽  
Cereal Crop ◽  
Crested Wheatgrass ◽  
Forage Crop ◽  
Crop Establishment ◽  
Arid Conditions ◽  
Cereal Grain ◽  
Companion Crop ◽  
Forage Yields

The effect of wheat, oats, barley, and spring rye as companion crops on the establishment of a perennial forage crop mixture consisting of crested wheatgrass, brome, and alfalfa under arid conditions compared to no companion crop was studied at Swift Current, Saskatchewan. Cereal companion crops reduced the vigour, stand, and subsequent early forage yields of the grass-alfalfa mixtures, but less so if the cereal crop and the forage crop were seeded separately at right-angles to one another. The method of harvesting the cereal companion crop also influenced the performance of the subsequent forage crop. Cutting the cereal crops at a height of 8 inches or more for grain resulted in better grass-alfalfa stands and yields than was obtained when the cereal crops were mowed at a 2-inch height for hay. The effect of kind of cereal grain on performance of the perennial forage differed little. Wider row spacings for the cross-seeded companion crops also resulted in a better stand and yield of the grass-alfalfa crop.

XII.—On Salpingostoma dasu: A New Carboniferous Seed from East Lothian

1942 ◽  
Vol 60 (2) ◽  
pp. 427-464 ◽  
Author(s):  
W. T. Gordon
Keyword(s):  
Arid Climate ◽  
Fossil Plants ◽  
Lower Carboniferous ◽  
Positive Evidence ◽  
Arid Conditions ◽  
Lithological Character ◽  
Semi Arid

In a recent paper (Gordon, 1938) reasons were given for the belief that semi-arid conditions prevailed during Lower Carboniferous times in the neighbourhood of North Berwick, East Lothian. The evidence was opposed, in a measure, to that advanced by Mr George Barrow in the East Lothian Memoir (1910) to substantiate the same position. He had relied on the absence of fossils as part proof; but, in point of fact, fossil plants have been obtained in abundance from the actual bedded ashes of Oxroad Bay that he considered (a) to be unfossiliferous, and (b) to have been formed in a manner similar to beds on the Springbok Flats of the Transvaal. The plants that have now been obtained showed xerophytic features, and, consequently, a semi-arid climate was proved on positive evidence. Other positive evidence of a lithological character was also presented in confirmation (Gordon, 1938, pp. 352, 353).

XII.—On Salpingostoma dasu: A New Carboniferous Seed from East Lothian

1942 ◽  
Vol 50 (2) ◽  
pp. 427-464
Author(s):  
W. T. Gordon
Keyword(s):  
Arid Climate ◽  
Fossil Plants ◽  
Lower Carboniferous ◽  
Positive Evidence ◽  
Arid Conditions ◽  
Lithological Character ◽  
Semi Arid

In a recent paper (Gordon, 1938) reasons were given for the belief that semi-arid conditions prevailed during Lower Carboniferous times in the neighbourhood of North Berwick, East Lothian. The evidence was opposed, in a measure, to that advanced by Mr George Barrow in the East Lothian Memoir (1910) to substantiate the same position. He had relied on the absence of fossils as part proof; but, in point of fact, fossil plants have been obtained in abundance from the actual bedded ashes of Oxroad Bay that he considered (a) to be unfossiliferous, and (b) to have been formed in a manner similar to beds on the Springbok Flats of the Transvaal. The plants that have now been obtained showed xerophytic features, and, consequently, a semi-arid climate was proved on positive evidence. Other positive evidence of a lithological character was also presented in confirmation (Gordon, 1938, pp. 352, 353).

scholarly journals Observations on the survival capacity of 118 plant taxa on a green roof in a semi-arid climate: 12 year update

2021 ◽  
Vol 8 (1) ◽  
pp. 19-40
Author(s):  
Amy Schneider ◽  
◽  
Michelle Landis ◽  
Jennifer Bousselot ◽  
◽  
...  
Keyword(s):  
Overall Survival ◽  
Green Roof ◽  
Survival Rates ◽  
Green Roofs ◽  
Arid Climate ◽  
Botanic Gardens ◽  
Growth Type ◽  
Arid Conditions ◽  
Survival Capacity ◽  
Semi Arid

The Green Roof at Denver Botanic Gardens was built in the fall of 2007. Since installation, data on the green roof have been collected on 118 plant taxa 43 of which have survived for over 10 years. Plants were grouped based on their metabolic and growth type: succulents, creeping forbs, upright forbs, graminoid, and shrubs. Overall, shrubs and succulents have displayed the highest survival rates, showing the greatest potential for use on green roofs in semi-arid conditions. Graminoids survived about half the time and creeping and upright forbs had the lowest overall survival in semi-arid Colorado. Species survivability rates were calculated based on the number of plants of that species originally installed on the green roof.

scholarly journals Spreading of the semi-arid climate across South Africa

2021 ◽  
Author(s):  
Mark R. Jury
Keyword(s):  
South Africa ◽  
Coupled Model ◽  
Arid Climate ◽  
Shelf Zone ◽  
Potential Evaporation ◽  
Sea Breezes ◽  
Arid Conditions ◽  
Upper Level ◽  
Long Timescales ◽  
Semi Arid

Abstract The eastward shift of semi-arid climate across South Africa is studied using satellite assimilated cloud cover, vegetation temperature and potential evaporation 1981–2019, and 21st century coupled model projections. Semi-arid thresholds over the plateau have shifted hundreds of kilometers eastward in the Vaal River catchment for potential evaporation, cloud fraction, and vegetation temperature. Coastal cloudiness has also changed due to sea breezes modified by shelf zone sea temperatures. Processes underlying the spread of semi-arid conditions across South Africa are quantified. Desiccation is related to greater westerly airflow, as the atmospheric boundary layer over the Kalahari preferentially links with the upper-level circulation. Warm dry spells and climate change enhance the meridional temperature gradient and accelerate the sub-tropical jet at both short- and long timescales. According to observations and reanalysis, dry westerlies prevail during the afternoon and induce +0.2 °C/year trends in vegetation temperature over the Highveld during the study period. Coupled model projections show that semi-arid conditions expand eastward from Bloemhof (25.5°E) by 50,000 km2, altering future adaptation strategies.

MONITORING A CAVE ENVIRONMENT IN THE SIERRA NEVADA — IMPLICATIONS FOR INTERPRETING STALAGMITE RECORDS FROM A SEMI-ARID CLIMATE

2019 ◽  
Author(s):  
Kimberly Bowman ◽  
◽  
Eleana Brumage ◽  
Elizabeth Diaz ◽  
Daphne Kuta ◽  
...  
Keyword(s):  
Sierra Nevada ◽  
Arid Climate ◽  
Cave Environment ◽  
Semi Arid

Modeling and experimental investigation of dust effect on glass cover PV module with fixed and tracking system under semi-arid climate

2021 ◽  
Vol 230 ◽  
pp. 111219
Author(s):  
Alae Azouzoute ◽  
Charaf Hajjaj ◽  
Houssain Zitouni ◽  
Massaab El Ydrissi ◽  
Oumaima Mertah ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Tracking System ◽  
Arid Climate ◽  
Glass Cover ◽  
Pv Module ◽  
Dust Effect ◽  
Semi Arid

scholarly journals Data of a PV plant implemented in hot semi-arid climate

Data in Brief ◽  
2021 ◽  
Vol 34 ◽  
pp. 106756
Author(s):  
Nour-eddine Id Omar ◽  
Lahcen Boukhattem ◽  
Fahd Oudrhiri Hassani ◽  
Amin Bennouna ◽  
Aziz Oukennou
Keyword(s):  
Arid Climate ◽  
Semi Arid
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