Sectional notes     

J. H. Heckman  H. G. Zuckerman  C. H. Metzger  B. A. Brown  E. R. Bennett  W. B. Ward  C. L. Fitch  O. H. Elmer  Jhon S. Gardner  Julan C. Miller  Frank W. Hussey  E. L. Newdick  Ralph W. Donaldson  Lionel Harris  H. O. Werner  Wm. H. Martin  E. V. Hardenburg  T. E. Odland  Robert Schmidt  Geo E. Prince  Brooks D. Drain  Harold L. Bailey  G. S. Ralston  Chase D. Gaines  J. G. Milward  John Tucker 《American Journal of Potato Research》1935,12(6):158-170

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Fertilizer Placement Tests With Potatoes     

T. E. Odland  S. C. Damon 《American Journal of Potato Research》1932,9(8):125-128

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Regional differences in aspen (Populus tremuloides Michx.) seedling response to an established nursery protocol     

Howe  Alexander A.  Landhäusser  Simon M.  Burney  Owen T.  Long  James N.  Mock  Karen E. 《New Forests》2020,51(2):367-378

New Forests - In seedling-based reforestation operations, seed source is known to be an influential variable affecting outplanting success. Adaptive variation among seed sources may also be an...  相似文献   

A PRELIMINARY NOTE ON THE EFFECT OF PARAOUAT ON SEED CROPS OF WHITE CLOVER     

T. F. Blood 《Grass and Forage Science》1962,17(3):178-181

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Study of Irritants Related to Piperine     

Hasselstrom T  Coles HW  Kennedy NE 《Science (New York, N.Y.)》1952,116(3008):204-205

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THE UTILIZATION OF GRASS FED INDOORS TO YOUNG BEEF CATTLE, WITH OR WITHOUT SUPPLEMENTARY BARLEY     

T. J. Forbes    A. M. Raven    J. H. D. Irwin  K. L. Robinson 《Grass and Forage Science》1967,22(3):158-164

An experiment was carried out in which grass was cut and fed indoors, with or without supplementary barley. Seven animals were allocated to each of the following treatments: (1) grass ad lib . without supplementary barley; (2) grass ad lib . with supplementary barley at the rate of 0.5 lb/100 lb bodyweight; (3) grass ad lib . with supplementary barley at the rate of 1 lb/100 lb bodyweight. Supplementary barley increased total dry-matter intake and improved daily liveweight gain and food conversion rate. The mean daily liveweight gains for the 17-week experimental period were 1.60, 1.91 and 2.20 lb and the corresponding feed dry-matter conversion ratios were 6.18, 5.67 and 5.55 for Treatments 1, 2 and 3, respectively.
The dry-matter digestibility of the diets was slightly higher when the grass was supplemented with barley than when grass alone was given. Although barley depressed the digestibility of protein, the absolute and the proportionate retention of nitrogen was increased. This was particularly marked on Treatment 3, presumably because of the higher net energy value of the diet containing the greater amount of barley. The N-retention data corresponded to the rates of liveweight gain obtained.  相似文献   

The measurement of stem toughness in marrow-stem kale using a simple laboratory penetrometer     

T. D. Johnston 《Euphytica》1967,16(3):365-369

The construction and use of a variable force penetrometer for measuring the woodiness of kale stems is described.The force required to cause penetration of the probe through the xylem tissue was found to bear a close relationship to estimates of quality based on in vitro digestibility determinations, crude fibre content and visual assessment of lignification in stained transverse sections of stems.  相似文献   

THE NUTRITIVE VALUE AND AGRONOMIC ASPECTS OF SOME FODDERS IN NORTHERN NIGERIA     

T. B. Miller  A. Blair  Rains R. J. Thorpe 《Grass and Forage Science》1964,19(1):77-80

Digestibility data are presented on the following; Andropogon gayanus hay and bush foggage, Arachis hypogoea (groundnut) haulms, Glycine max (soya-bean) hay. Sorghum vulgare (sorghum) leaves and hay, Stizolobium sp. (velvet bean) hay, Vigna sinensis (cowpea) hay and haulms, and S. vnlgare/Stizolobium sp. mixture. The results are discussed from the agronomic aspect.  相似文献   

Developments in Yield Control and Inventory in British Forestry     

JOHNSTON  D. R.; BRADLEY  R. T. 《Forestry》1964,37(1):21-30

Forecasting timber production many years in advance has becomea problem of considerable importance in this country becauseof the need to co-ordinate the rapid increase in productionwith the establishment of new timber-using industries. Thispaper describes a change in emphasis in state forest WorkingPlan Inventory methods employed in the predominantly young,coniferous forests of Great Britain and is a development ofthe methods described in a previous paper (‘Problems ofYield Control and Inventory in British Forestry’—D.R. Johnston, 1960, Forestry, 33, 19–36). Total enumerationof the growing stock is no longer the main objective of forestinventory and the new approach is directed towards (a) assessmentof the productive potential of each subcompartment and (b) theintensive enumeration of sample or ‘index’ subcompartmentsinitially and at each re-enumeration as a check on growth predictionsand yield control.  相似文献   

THE INFLUENCE OF FERTILIZER ON THE WINTER SURVIVAL OF INTERMEDIATE WHEATGRASS FOLLOWING A LONG PERIOD OF DROUGHT     

T. Lawrence 《Grass and Forage Science》1963,18(4):292-294

In Saskatchewan, intermediate wheatgrass ( Agropyron intermedium Host. Beauv.) suffered severe winter injury during the 1961–2 winter season, which followed a series of drought years, the most severe being 1961. In two tests, designed to study fertilizer effects, the extent of severe winter injury increased with the rate of application. The killing ranged from 4% where no fertilizer was applied to 90% where 66 lb of N per acre were applied. Slightly more winter-killing occurred after applications of ammonium phosphate/sulphate (16-20-0) fertilizer than after ammonium nitrate (33·5-0-0).
The grass growing in rows 36 in. apart killed out to a greater extent than that growing in rows 18 in apart Less winter injury occurred after spring applications of fertilizer than after application in the fall.  相似文献