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Articles 1 - 5 of 5
Full-Text Articles in Agriculture
Relationship Between Measures Of Semen Quality And Fertility In Bulls Mated Under Natural Conditions, J. N. Wiltbank, W. W. Rowden, J. E. Ingalls
Relationship Between Measures Of Semen Quality And Fertility In Bulls Mated Under Natural Conditions, J. N. Wiltbank, W. W. Rowden, J. E. Ingalls
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
An evaluation of the relationship between several measures of semen quality and fertility of bulls mated under natural conditions has been conducted over a three-year period. Semen was collected three different times with an electro-ejaculator from bulls used in the fertility tests. Collections were made at weekly intervals. Fertility was evaluated by mating bulls to heifers starting about three days after the last collection. Semen quality refers to the percent abnormals and the percent motility evaluated at the time of collection. Fertility was measured by the proportion of heifers that settled at natural service. Several multiple regression equations were calculated. …
Profit Maximizing Farm Plans For Farms In Southeastern Nebraska: By Type And Size Of Farm, M. D. Skold, A. W. Epp, H. W. Hughes
Profit Maximizing Farm Plans For Farms In Southeastern Nebraska: By Type And Size Of Farm, M. D. Skold, A. W. Epp, H. W. Hughes
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
There are many forces operating in today's agricultural economy which cause farmers to examine carefully their patterns of resource allocation. Rising production costs coupled with downward tendencies in product prices focuses attention on efficient patterns of resource allocation. Technical change and changing resource and product price relationships affect efficient resource allocation patterns. This study considers possible efficient farm organizations available to farmers in southeastern Nebraska with given resources. The study determines profit maximizing farm plans for farm classes with different complements of resources and at alternative product price levels. Both crop and livestock enterprises are considered. Investment activities that generate …
Irrigation And Fertilization Practices For Seed Production From Established Stands Of Side-Oats Grama, D. E. Smika, L. C. Newell
Irrigation And Fertilization Practices For Seed Production From Established Stands Of Side-Oats Grama, D. E. Smika, L. C. Newell
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The objectives of this study of grass seed production were to determine the response of an established stand of a warm-season grass to irrigation and fertilizer practices with regard to the specific practices needed to produce maximum quantity of adequate quality seed per acre. Side-oats grama was chosen for the study because of the availability of adapted varieties.
Appraisal For Combined Pea Aphid And Spotted Alfalfa Aphid Resistance In Alfalfa, W. L. Howe, W. R. Kehr, C. O. Calkins
Appraisal For Combined Pea Aphid And Spotted Alfalfa Aphid Resistance In Alfalfa, W. L. Howe, W. R. Kehr, C. O. Calkins
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
Sources of combined resistance to spotted alfalfa and pea aphids were found in Ranger alfalfa and its parental strains, foreign plant introductions, clones and their progenies. Ranger alfalfa appeared to be a good source for selection of plants with resistance to both aphids.
Seed And Phenological Studies With Shattercane, O. C. Burnside
Seed And Phenological Studies With Shattercane, O. C. Burnside
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
This research deals with the phenology and life history of shattercane, studies on seed dormancy and germination characteristics, and a description of the natural variability that occurs within this weedy species. Detailed information is needed on this weed before an intelligent approach can be made toward its control. These studies also may serve to familiarize people with shattercane and make them cognizant of its potential as a weed.