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I. Value of soil test information fo...

Lukin, Vladimir Vasiljevich.

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I. Value of soil test information for crop production. II. Soil pH response to lime and wheat yield response to soil pH. III. Economic strategies of low soil pH management in dual-purpose winter wheat production.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	I. Value of soil test information for crop production. II. Soil pH response to lime and wheat yield response to soil pH. III. Economic strategies of low soil pH management in dual-purpose winter wheat production./
作者:	Lukin, Vladimir Vasiljevich.
面頁冊數:	89 p.
附註:	Adviser: Francis Epplin.
Contained By:	Dissertation Abstracts International62-01A.
標題:	Agriculture, Agronomy. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9999916
ISBN:	0493086293

I. Value of soil test information for crop production. II. Soil pH response to lime and wheat yield response to soil pH. III. Economic strategies of low soil pH management in dual-purpose winter wheat production.
Lukin, Vladimir Vasiljevich.

I. Value of soil test information for crop production. II. Soil pH response to lime and wheat yield response to soil pH. III. Economic strategies of low soil pH management in dual-purpose winter wheat production. - 89 p.

Adviser: Francis Epplin.

Thesis (Ph.D.)--Oklahoma State University, 2000.

<italic>Scope and method of study</italic>. This dissertation consists of three chapters, each summarizing research problems conducted separately during my doctoral program.

ISBN: 0493086293Subjects--Topical Terms:

1018679
Agriculture, Agronomy.

I. Value of soil test information for crop production. II. Soil pH response to lime and wheat yield response to soil pH. III. Economic strategies of low soil pH management in dual-purpose winter wheat production.
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245 1 0 $a I. Value of soil test information for crop production. II. Soil pH response to lime and wheat yield response to soil pH. III. Economic strategies of low soil pH management in dual-purpose winter wheat production.
300 $a 89 p.
500 $a Adviser: Francis Epplin.
500 $a Source: Dissertation Abstracts International, Volume: 62-01, Section: A, page: 0263.
502 $a Thesis (Ph.D.)--Oklahoma State University, 2000.
520 $a <italic>Scope and method of study</italic>. This dissertation consists of three chapters, each summarizing research problems conducted separately during my doctoral program.
520 $a The first study was conducted to determine the value of information associated with soil testing for available nitrogen and phosphorus when choosing fertilizer application rates. Actual aggregate data of nutrient levels for winter wheat fields were used to estimate expected yields obtained with or without information.
520 $a The second study addressed to determine soil pH response to applications of agricultural lime, wheat yield response to soil pH, and the economics of lime application to soils used to produce winter wheat. The optimal strategies were found for several levels of initial soil pH.
520 $a The objectives of the third chapter were to determine whether the choice of wheat variety or application of phosphorus fertilizers could be an economically optimal alternative to lime application in the short-run. The study compared three strategies of soil acidity management.
520 $a <italic>Findings and conclusions</italic>. The estimated value of soil testing information was positive under various assumptions about the distribution of nutrients in soil. The values of soil testing information can be used in determining the upper limit of the cost of soil testing in winter wheat production.
520 $a An original functional form was specified and used to model soil pH response over time to lime application. Quadratic, linear-response plateau, and quadratic-response plateau functional forms were used to model wheat yield response to soil pH. The lime application level that maximizes net present value from wheat production was determined for several levels of initial soil pH.
520 $a The economics of the strategies were compared for tolerant and susceptible wheat varieties. Lime application is the preferable choice when the cost of liming is discounted over a period of five years. Tolerant varieties are more profitable than susceptible varieties if no lime is applied. The conditions of crop sharing contracts are considered: when a variable input has a multiyear effect, the optimal structure of revenue and cost shares changes.
590 $a School code: 0664.
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650 4 $a Agriculture, Soil Science. $3 1017824
650 4 $a Economics, Agricultural. $3 626648
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710 2 0 $a Oklahoma State University. $3 626630
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791 $a Ph.D.
792 $a 2000
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