Case study: The effect of wheat density and cultivar on growth and reproduction of burr medic ( Medicago polymorpha L.), wheat growth, and yield

Seed of 2 cultivars of wheat (Triticum aestivum) and 1 burr medic (Medicago polymorpha) with increasing phosphorus (P) concentrations (wheat 1.4-3.7 g P/kg dry matter, medic 3.3-7.9 g P/kg dry matter) were collected from field experiments with variable levels of applied superphosphate (wheat 0- 577 kg P/ha, medic 0-364 kg P/ha) in south-western Australia. These seeds were used in further experiments to examine the effect of seed P concentration on the subsequent dry matter (DM) production of seedlings and plants in 3 glasshouse pot experiments and 1 field experiment. Seed of the same size (wheat, 35 mg/seed; medic, 3.6 mg/seed) but with increasing P concentration produced substantially higher DM yields in the absence or presence of freshly applied superphosphate P up to 28-35 days after sowing in the pot experiments and 67 days after sowing in the field experiment.

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Comparative Effects of Two Nitrogen Sources on the Growth and Yield of Roselle (Hibiscus sabdariffa) in the Rainforest Region: A Case Study of Benin-City, Edo State, Nigeria

Journal of Agronomy ◽

10.3923/ja.2007.142.146 ◽

2006 ◽

Vol 6 (1) ◽

pp. 142-146 ◽

Cited By ~ 1

Author(s):

R.K.A. Egharevba . ◽

K.E. Law-Ogbomo .

Keyword(s):

Nitrogen Sources ◽

Growth And Yield ◽

Hibiscus Sabdariffa ◽

Benin City ◽

Edo State

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Wheat Growth and Yield Contributing Characters under Various Sources and Schedules of Nitrogenous Fertilizer

Journal of Applied Sciences ◽

10.3923/jas.2002.1013.1015 ◽

2002 ◽

Vol 2 (11) ◽

pp. 1013-1015 ◽

Cited By ~ 1

Author(s):

M.R. Wagan . ◽

F.C. Oad . ◽

K.S. Nenwani .

Keyword(s):

Growth And Yield ◽

Wheat Growth ◽

Nitrogenous Fertilizer

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Impact of applying composted biosolids on wheat growth and yield parameters on a calcimagnesic soil in a semi-arid region

AFRICAN JOURNAL OF BIOTECHNOLOGY ◽

10.5897/ajb10.1010 ◽

2012 ◽

Vol 11 (41) ◽

Author(s):

Mohamed Hafidi

Keyword(s):

Arid Region ◽

Growth And Yield ◽

Wheat Growth ◽

Yield Parameters ◽

Semi Arid Region ◽

Semi Arid

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Growth and Yield Following Four Reproduction Cutting Methods in Loblolly-Shortleaf Pine Stands--A Case Study

Southern Journal of Applied Forestry ◽

10.1093/sjaf/6.2.66 ◽

1982 ◽

Vol 6 (2) ◽

pp. 66-74 ◽

Cited By ~ 4

Author(s):

James B. Baker ◽

Paul A. Murphy

Keyword(s):

Pinus Taeda ◽

Growth And Yield ◽

Shortleaf Pine ◽

Advantages And Disadvantages ◽

Land Owners ◽

Second Growth ◽

Pine Regeneration ◽

Volume Production ◽

Pinus Taeda L

Abstract Four reproduction cutting methods employed on an average site (S.I. = 85 to 90 feet at 50 years) in second-growth loblolly-shortleaf pine (Pinus taeda L.--P. echinata Mill.) in south Arkansas provided adequate pine regeneration to establish or maintain well-stocked stands. During the 36-year study period, heavy seed-tree and diameter-limit cutting methods produced significantly more cubic-foot volume than selection and clearcutting, while clearcutting resulted in significantly less board-foot (Doyle) volume. Since many trees on the clearcut areas are just now reaching sawlog size, board-foot volume production among all treatments will probably equalize as time goes on. Advantages and disadvantages of the four cutting methods for large landholders and private nonindustrial land-owners are discussed.

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Pitch Canker Impact on Volume Growth: A Case Study In Slash Pine Plantations

Southern Journal of Applied Forestry ◽

10.1093/sjaf/8.1.43 ◽

1984 ◽

Vol 8 (1) ◽

pp. 43-47 ◽

Cited By ~ 7

Author(s):

Loukas G. Arvanitis ◽

John F. Goodbee ◽

Iris Porta

Keyword(s):

Volume Growth ◽

Slash Pine ◽

Growth And Yield ◽

Pitch Canker ◽

Diameter Class ◽

Tree Diameter ◽

Volume Increment ◽

The Mean ◽

The Impact

Abstract Measurements from 26 permanent test plots established in slash pine (Pinus elliotti var. elliotti Engelm.) plantations of northeast Florida and southeast Georgia in 1976 have been used to assess the impact of pitch canker on growth and yield of trees over time. The plots were remeasured annually for five years. The mean annual volume increment for infected trees was between 60 and 81 percent of that of the healthy trees. Trees that were repeatedly infected grew proportionately less, over the five-year period, than those that were infected only once or twice. The five-year periodic volume increment for the most severely infected trees was between one-third and two-thirds of that of healthy trees in the same diameter class. Incidence of infection was not correlated with tree diameter. The overall cubic foot volume loss due to growth suppression and mortality amounted to 4.5 percent of the expected total volume in 1981. This loss represents 15 percent of the anticipated five-year volume growth.

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Measuring Wildfire Impacts: Method and Case Study

Southern Journal of Applied Forestry ◽

10.1093/sjaf/11.3.143 ◽

1987 ◽

Vol 11 (3) ◽

pp. 143-147

Author(s):

W. L. Mills ◽

S. D. Shnitzler ◽

R. S. Meldahl

Keyword(s):

Economic Impact ◽

Cash Flow ◽

Flow Model ◽

Growth And Yield ◽

Timber Production ◽

Discounted Cash Flow ◽

The Impact ◽

Data Requirements

Abstract A discounted cash flow model called the Impact Appraisal Model (IAM) computes the economic impact due to a change in timber production caused by a wildfire. Data requirements for the IAM can be obtained using standard inventory procedures to estimate the pre- and post-fire stand conditionsneeded to initiate a growth and yield simulator. The model is demonstrated using five loblolly plantations that burned in 1980 and 1981. South. J. Appl. For. 11(3):143-147.

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