Treesearch

Growth of the most widely distributed pine in North America is under joint study by the western Forest and Range Experiment Stations of the U. S. Forest Service. Young, even-aged ponderosa pine (Pinus ponderosa Laws.) stands are being examined over a wide range of tree sizes, stand densities, and site index. The single plan that co-ordinates activities of the four Stations is an example of how the growing stock problem can be handled for a widely distributed species. The wide range in treatments should provide data needed to answer the questions that arise in evaluation and application of...

Successful regeneration depends upon good coordination between seed production and seedbed preparation. To aid forest managers in scheduling seedbed preparation, a simple sequential sampling plan for estimating potential cone crops as much as a year in advance of the seed fall was developed and is described herein. With advance knowledge of the cone crop prospects, the manager can schedule seedbed preparation or select an alternative action such as postponing work or substituting planting.

A simple procedure for evaluating the diameter growth of young stands in relation to potential growth is described. A comparison technique is developed which contrasts relative diameter of crop trees to the relative diameter growth of the last decade to show the condition and trend of growth in the stand. The method is objective, easy to use, and has several applications such as: (1) determining relative growth performance of trees and stands, (2) confirming the need for thinning and setting of priority among stands, and (3) determining the growth impact of disease and other growth...

Forage available for use by livestock varies with the season in which ranges are used. Specific precipitation patterns accounted for 87% or more of the variation in forage yields of crested wheatgrass grazed at different seasons in the Front Range of Colorado. Rainfall in April determined forage yields of ranges grazed in the spring; May and July rainfall determined forage yields for fall-grazed ranges. Expected forage yields and stocking rates can therefore be predicted from precipitation measurements.

This report is concerned primarily with timber. It presents figures regarding significant factors bearing on the present economics of this resource. Another purpose of the report is to describe some of the most important considerations that bear on greater development of the timber resource in the future. Other forest values -- water, recreation, and forage -- are discussed briefly. Trends in use of these resources must be considered in relation to timber, because practically no forest lands are managed for timber alone.

This report is concerned primarily with timber. It presents figures regarding significant factors bearing on the present economics of this resource. Another purpose is to describe some of the most important considerations that bear on future development of the timber resource. Other forest values - water, recreation, and forage - are discussed briefly. Trends in use of these resources must be considered in relation to timber, because practically no forest lands are managed for timber alone.

The usual methods of marking cattle ear tags or neck chains are often unsatisfactory in livestock management and research. When obtaining birthweights of calves at the Manitou Experimental Forest in Colorado, for instance, it was nearly impossible for us to get close enough to range cows to read ear tags. We needed a large identifying number that could be applied to the cows prior to calving, and that would last several months.

Forage samples collected by freely grazing ruminal fistulated steers were analyzed chemically and botanically to ascertain the quality of the diets selected by two herds of Hereford range cows managed under separate grazing systems. The herd grazing native and seeded ranges on an integrated basis was maintained on a high plane of dietary crude protein and phosphorus for a longer period of time than was the herd grazing native ranges only. The response was attributed to earlier initiation of spring growth and lateral attainment of winter dormancy by the seeded forage species. Seasonal...

The Manitou Experimental Forest Was established in 1936 to study problems of land use as they relate to the management of all the resources. The experimental forest lies 28 miles northwest of Colorado Springs. the experimental area totals 25 square Miles, and represents the land of the Colorado Front Range within the ponderosa pine zone. The ponderosa pine zone in the Front Range of the Colorado Rocky Mountains encompasses approximately 4 million acres. An area of numerous mountain ranges and interspersed valleys with open parks and grasslands, this zone is well suited for the production...

George Fahnestock's work (1960) on logging slash was a guide for establishing the experimental plots. The purposes of his study and the present one were different. Fahnestock was interested chiefly in comparing the influences of species, loading, and aging on burning slash. He was evaluating factors that influence the burning of natural beds of logging slash. The study reported here was designed to relate flame front characteristics to a specific fuel bed. To facilitate the comparison of data from the two studies, fuel beds were loaded at the same weights per acre (7.5, 20.0, and 32.5 tons...