Effect of Manure, Nitrogen, Phosphorus, and Climatic Factors on the Production and Quality of Bromegrass‐Crested Wheatgrass Hay<sup>1</sup>

Thomas, J. R.; Osenbrug, A.

doi:10.2134/agronj1959.00021962005100020001x

Cited by 18 publications

(17 citation statements)

References 4 publications

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“…Results are similar to those obtained by Smika et al (1960) and by Thomas (1964 Weather conditions at harvest time influenced herbage moisture strongly.…”

Section: Herbagesupporting

confidence: 91%

Fall Fertilization of Intermediate Wheatgrass in the Southwestern Ponderosa Pine Zone

Lavin¹

1967

Journal of Range Management

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“…Results are similar to those obtained by Smika et al (1960) and by Thomas (1964 Weather conditions at harvest time influenced herbage moisture strongly.…”

Section: Herbagesupporting

confidence: 91%

Fall Fertilization of Intermediate Wheatgrass in the Southwestern Ponderosa Pine Zone

Lavin¹

1967

Journal of Range Management

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“…5). When N has been reduced as a limiting factor in this and other studies (Thomas andOsenbrug 1964, Wiedenfeld et al 1985), yield per unit of rainfall received has often more than doubled.…”

Section: Methodsmentioning

confidence: 48%

“…in only a few situations did increasing rate of N application have an effect on apparent N and P fertilizer use efficiency. Fertilizer recovery by forages in more temperate climates is typically somewhat better (Thomas and Osenbrug 1964). However, compared to annual row crops grown in this same environment although on different soil types, N fertilizer recovery is roughly the same and P fertilizer recovery by these forage grasses is better.…”

Section: Methodsmentioning

confidence: 98%

Coastal Bermudagrass and Renner Lovegrass Fertilization Responses in a Subtropical Climate

Wiedenfeld¹

1988

Journal of Range Management

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“…A new statistical method was used to estimate carry-over nitrogen and the forage yield-response function simultaneously. Nitrogen carry-over was estimated implicitly through yield response without direct measurements of nitrogen.There is considerable evidence that grasses growing in semiarid regions generally respond to nitrogen fertilizer and that nitrogen carryover from year to year can be an important source of nitrogen in subsequent growing seasons (Black;Power 1967Power , 1968Thomas and Osenbrug). Determination of optimal fertilization policies is considerably complicated by nitrogen carry-over.…”

mentioning

confidence: 99%

An Economic Evaluation of Nitrogen Fertilization of Grasses When Carry‐over is Significant

Stauber¹,

Burt

Linse³

1975

American J Agri Economics

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An economic model is developed to determine optimal nitrogen fertilization policies for seeded grasses in semiarid regions where nitrogen carry-over is significant. The problem is cast in the framework of stochastic dynamic programming and an application of the model is made at two sites in the Nothern Great Plains. A new statistical method was used to estimate carry-over nitrogen and the forage yield-response function simultaneously. Nitrogen carry-over was estimated implicitly through yield response without direct measurements of nitrogen.There is considerable evidence that grasses growing in semiarid regions generally respond to nitrogen fertilizer and that nitrogen carryover from year to year can be an important source of nitrogen in subsequent growing seasons (Black;Power 1967Power , 1968Thomas and Osenbrug). Determination of optimal fertilization policies is considerably complicated by nitrogen carry-over. The decision problem is dynamic and is further complicated if carryover is stochastic. Stochastic carry-over is quite plausible when the relationships between seasonal precipitation, forage yield, and nitrogen recovery by the grass crop are considered (Stauber and Burt). The determination of optimal fertilization policies for dryland grasses must be cast in a dynamic stochastic framework. The Decision ModelEconomic analysis of nitrogen fertilization when carry-over is significant and stochastic involves a determination of the sequence of decisions regarding the application of nitrogen fertilizer which will maximize expected present value of net returns. The basic approach M. S. Stauber is an associate professor and Oscar R. Burt is a professor of agricultural economics and economics at Montana State University. Fred Linse is an agricultural economist with the Economic Research Service, U.S. Department of Agriculture.Montana Agricultural Experiment Station Journal Series 593.is to find a decision rule which specifies the amount of nitrogen to apply in a particular year, given the amount of plant-available nitrogen carried over from previous years. Formally, the decision rule is a functional relationship between the amount of fertilizer applied and the estimated amount of plantavailable nitrogen in the soil at the appropriate time for application of fertilizer. The problem can be viewed as that of maintaining an optimal inventory of plant-available nitrogen in the soil under conditions of stochastic demand arising from random precipitation. Economic considerations must include costs other than the purchase cost of fertilizer. An important trade-off exists between interest and spreading costs; infrequent applications in large amounts save spreading costs but increase interest costs through a larger average investment. Then on the revenue side is the usual consideration of crop response to total plant-available nitrogen, the sum of carry-over nitrogen and that applied currently as fertilizer.An expected value criterion applied to discounted net returns over a long planning horizon automatically weighs all of ...

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Effect of Manure, Nitrogen, Phosphorus, and Climatic Factors on the Production and Quality of Bromegrass‐Crested Wheatgrass Hay¹

Cited by 18 publications

References 4 publications

Fall Fertilization of Intermediate Wheatgrass in the Southwestern Ponderosa Pine Zone

Fall Fertilization of Intermediate Wheatgrass in the Southwestern Ponderosa Pine Zone

Coastal Bermudagrass and Renner Lovegrass Fertilization Responses in a Subtropical Climate

An Economic Evaluation of Nitrogen Fertilization of Grasses When Carry‐over is Significant

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Effect of Manure, Nitrogen, Phosphorus, and Climatic Factors on the Production and Quality of Bromegrass‐Crested Wheatgrass Hay1

Cited by 18 publications

References 4 publications

Fall Fertilization of Intermediate Wheatgrass in the Southwestern Ponderosa Pine Zone

Fall Fertilization of Intermediate Wheatgrass in the Southwestern Ponderosa Pine Zone

Coastal Bermudagrass and Renner Lovegrass Fertilization Responses in a Subtropical Climate

An Economic Evaluation of Nitrogen Fertilization of Grasses When Carry‐over is Significant

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Effect of Manure, Nitrogen, Phosphorus, and Climatic Factors on the Production and Quality of Bromegrass‐Crested Wheatgrass Hay¹