Life Sciences Commons^™

Optimizing The Physical And Nutritional Environment Of Unleached Root-Zones, Curtis B. Adams

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Unleached root-zones represent an environmental ideal by eliminating wasteful leaching of nutrients and water. NASA grows plants in space in unleached root-zones, incorporating polymer-coated fertilizer (PCF) into a ceramic media (Turface or Profile). However, lack of growth productivity in space has led to the need for research to improve the nutritional and physical environment of the root-zone, which is the objective of this research. PCF types are diverse in release characteristics and the effects of temperature and substrate water content have not been well characterized. In spite of widespread use, studies on chemical properties and applied studies to verify soil …

The Effect Of The Water Extracting Requirement Upon The Fertilizer, Yield And Growth Response Of Sweet Corn, Roberto Vazquez

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

There are a number of factors that influence crop yield, two of which are soil moisture and fertility.

The Comparative Value Of Commercial Phosphoric Acid As A Fertilizer, Bruce L. Baird

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The practice of applying fertilizers to the soil by adding the liquid form to the irrigation water is increasing in popularity. There are several advantages maintained for such a method of application. Some of the advantages are:

(A) Ease of application.

(B) No special equipment is required for application.

(C) The fertilizer can be applied at any stage of plant growth without physical disturbance of the plant.

(D) Penetration into the root zone may be greater than the dry fertilizers.

Considerable phosphate fertilizer is used on soils of irrigated regions. If the behavior of liquid phosphoric acid after its incorporation …

Fertilizer Studies As Conducted On The Carbon County Experimental Farm With Special Reference To Treble-Superphosphate, Delos Zobell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In 1927 an experimental farm was established in Carbon County, Utah. The farm is on a new irrigation tract south of the Price River and about four miles south of Price. The agricultural problems of the Carbon County Experimental Farm and the locality which it serves are distinctly different from those of most of the farming sections in Utah. The soil of this region is of a sandy, silty nature apparently with deflocculated colloids which make it somewhat difficult to manage. There is a low percentage of organic matter in this soil, and because of this and its impervious condition …

A Study Of Different Methods Of Applying Ammonium Sulfate Alone And In A Complete Fertilizer, Clarence Burnham

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The beneficial effects obtained from the application of farmyard manure to the soil have long been known in Utah, but now the point has apparently been reached where it becomes evident that the supply of manure is hardly adequate in some sections where intensive cropping is practiced. The use of commercial fertilizers to increase crop yields is a new practice in Utah agriculture as is shown in Table 1 from an estimate made from data kindly furnished by the Columbia Steel Company, Anaconda Copper Mining Company, Ford Motor Company, Armour Packing Company, and Porter Walton Company.

The early sales in …