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Effect Of Harvesting, Spacing And Age Of Plants On Yields Of Asparagus, E. S. Haber 2017 Iowa State College

Effect Of Harvesting, Spacing And Age Of Plants On Yields Of Asparagus, E. S. Haber

Bulletin (Iowa Agricultural Experiment Station)

Although Iowa has never ranked high among the states as a producer of asparagus for market or canning, the asparagus acreage planted, particularly by canners, is increasing.

No exact information is available concerning the effect of the cutting season’s length upon yields over a period of years. Market gardeners usually stop cutting asparagus in Iowa between June 1 and June 15. The demand for asparagus at this time decreases and the prices drop too low for profitable harvesting. To prevent damage to future yields, June 15 also appears to be the latest safe harvest date, though no substantiating experimental ...


Choosing Legumes And Perennial Grasses, F. S. Wilkins, H. D. Hughes 2017 Iowa State College

Choosing Legumes And Perennial Grasses, F. S. Wilkins, H. D. Hughes

Bulletin (Iowa Agricultural Experiment Station)

Many letters are received annually by the Iowa Agricultural Experiment Station requesting information on the different legumes and grasses. This publication has been prepared to answer the more important questions pertaining to the choice of legumes and grasses for different uses and conditions.2

Legumes of greatest value for different uses or soil conditions in Iowa are (1) alfalfa, (2) medium red clover, (3) mammoth red clover, (4) alsike clover, (5) white clover, (6) the biennial white and yellow sweet clovers, (7) hubam clover, (the annual white sweet clover) (8) Korean lespedeza, (9) dalea and (10) soybeans. A discussion of ...


A Production Method Of Valuing Land, W. G. Murray, H. R. Meldrum 2017 Iowa State College

A Production Method Of Valuing Land, W. G. Murray, H. R. Meldrum

Bulletin (Iowa Agricultural Experiment Station)

What is the value of a farm? One answer is the amount it will bring if sold. But let us assume a farmer wants to buy a farm. What can he afford to pay for it? A similar question faces the seller, anxious about what he should ask for his farm. For situations like these, valuation of the land on a productivity basis is helpful. Rightly used such a method can make farm valuations more precise and reliable. In addition to its use in determining the sale price of land, this method is well adapted for appraisals of land for ...


Seeding Rate For Dryland Wheat, A. Schlegel, J. D. Holman, L. Haag 2017 Kansas State University

Seeding Rate For Dryland Wheat, A. Schlegel, J. D. Holman, L. Haag

Kansas Agricultural Experiment Station Research Reports

Four winter wheat varieties (PlainsGold Byrd, Limagrain T158, Syngenta TAM 111, and WestBred Winterhawk) were planted at five seeding rates (30, 45, 60, 75, and 90 lb/a) in the fall of 2014 and 2015 at Colby, Garden City, and Tribune, KS. The objective of the study was to identify appropriate seeding rates for dryland winter wheat in western Kansas. Averaged across varieties, a seeding rate of 60 lb/a seemed to be adequate at all locations in 2015. However, with higher yields in 2016, a higher seeding rate (75 lb/a) was beneficial. The wheat variety T158 was the ...


Soybeans In Iowa Farming, Albert Mighell, H. D. Hughes, F. S. Wilkins 2017 Iowa State College

Soybeans In Iowa Farming, Albert Mighell, H. D. Hughes, F. S. Wilkins

Bulletin (Iowa Agricultural Experiment Station)

Few other crops in Iowa have shown such rapid acreage increases as soybeans or proved as advantageous for so many different uses. Only 471 acres of the crop were grown in the state in 1919. By 1933 the area had expanded to 192,000 acres. Soybeans may be planted either alone or with corn. Alone, they may be used for seed, hay, pasture, silage, soiling, or as a green manure crop. The first two of these uses are by far the most important. Iowa farmers need a home-grown, high protein concentrate, and soybeans are the best crop available for that ...


Effects Of Inoculation And Liming On Alfalfa Grown On The Grundy Silt Loam, R. H. Walker, P. E. Brown 2017 Iowa State College

Effects Of Inoculation And Liming On Alfalfa Grown On The Grundy Silt Loam, R. H. Walker, P. E. Brown

Bulletin (Iowa Agricultural Experiment Station)

In southern Iowa where the Grundy silt loam is one of the principal upland soil types, less than 1 percent of the total acreage of cropped land is devoted to the production of alfalfa. This low acreage in alfalfa is due to the fact that the soils there are generally acid in reaction and are not suited to the production of alfalfa until the acidity is corrected by liming. Furthermore, these acid soils are deficient in the alfalfa root-nodule bacteria which must be introduced into the soil after liming if the best results are to be obtained.

In this bulletin ...


Effects Of Inoculation And Liming On Soybeans Grown On The Grundy Silt Loam, R. H. Walker, P. E. Brown 2017 Iowa State College

Effects Of Inoculation And Liming On Soybeans Grown On The Grundy Silt Loam, R. H. Walker, P. E. Brown

Bulletin (Iowa Agricultural Experiment Station)

Soybeans are grown extensively on the Grundy silt loam in southern Iowa. This soil usually requires from 2 to 3 tons of limestone to correct the acidity. Furthermore, it does not naturally contain the nitrogen-fixing soybean root-nodule bacteria. Hence, experiments were conducted to determine the effects of liming and inoculation on the yield and quality of soybeans grown on typical Grundy silt loam. The experiments were conducted near Osceola in Clarke County.

Quarry-run limestone was applied to different plots in varying amounts, ranging from 1 to 6 tons per acre. On other plots limestone of different degrees of fineness was ...


Soil Management On The Carrington Silt Loam, P. E. Brown, H. R. Meldrum, A. J. Englehorn, R. E. Bennett 2017 Iowa State College

Soil Management On The Carrington Silt Loam, P. E. Brown, H. R. Meldrum, A. J. Englehorn, R. E. Bennett

Bulletin (Iowa Agricultural Experiment Station)

The Carrington silt loam occurs extensively on the gently rolling uplands throughout northeastern central Iowa and in the eastern central counties. It is one of the more important soil types in the Iowan drift soil area. The map (fig. 1) shows its approximate occurrence.

Crop yields are generally quite satisfactory on this soil, but some areas are not producing properly, and in many cases much larger yields per acre may be secured by the adoption of better methods of soil management. Suggestions have been offered in a previous publication* which if adopted will make this soil more productive and insure ...


A Soil Management Program For Grundy Silt Loam, W. H. Stevenson, P. E. Brown 2017 Iowa State College

A Soil Management Program For Grundy Silt Loam, W. H. Stevenson, P. E. Brown

Bulletin (Iowa Agricultural Experiment Station)

The results secured on 13 cooperative soil experimental fields on the Grundy silt loam in Southern Iowa have shown that the Iowa System of Soil Management when put into, operation on that soil type, will definitely increase the yields of general farm crops.

Occasionally the Grundy silt loam is not adequately drained, especially on some of the broad, level to flat areas of the type, and tiling is the first treatment needed to make such areas satisfactorily productive.

Ordinary farm practice usually provides satisfactory cultivation, and this is especially important on this type because it stimulates the production of available ...


The Effect Of Various Containers On The Growth Of Vegetable Plants, E. S. Haber 2017 Iowa State College

The Effect Of Various Containers On The Growth Of Vegetable Plants, E. S. Haber

Bulletin (Iowa Agricultural Experiment Station)

The experiments indicate that clay pots are superior, as a general rule, to composition pots, paper bands or flats as a growing medium for vegetable plants. If the plants in these substitute containers, however, are watered, about every week or 10 days with a solution of nitrate of soda, sulfate of ammonia or any other nitrogenous fertilizer at the rate of 1 ounce to 1 gallon of water, plants equal to those produced in clay pots are possible. A few species may do as well without nitrates; cabbage plants grown in peat pots were slightly better than those in clay ...


A Soil Management Program For Carrington Loam, W. H. Stevenson, P. E. Brown 2017 Iowa State College

A Soil Management Program For Carrington Loam, W. H. Stevenson, P. E. Brown

Bulletin (Iowa Agricultural Experiment Station)

Tests on 12 cooperative soil experiment fields on the Carrington loam in various counties indicate that the Iowa system of soil management is applicable to that soil and that the various treatments suggested are of definite value.

The Carrington loam is usually adequately drained, but in any areas where the drainage is poor, tiling is the first treatment needed to make such areas satisfactorily productive.

The proper cultivation of the soil is essential for the best growth of general farm crops. As the production of available plant food depends to a large extent upon cultivation, this affects crop yields materially.


Field Experiments With Fertilizers On Some Iowa Soils, W. H. Stevenson, P. E. Brown 2017 Iowa State College

Field Experiments With Fertilizers On Some Iowa Soils, W. H. Stevenson, P. E. Brown

Bulletin (Iowa Agricultural Experiment Station)

Many of the experiments carried out in the field in cooperation with Iowa farmers on some of the more extensive soil types in the state have been under way for 10 or more years. The average results secured on the Carrington loam, the Clarion loam, the Carrington silt loam, the Grundy silt loam, the Grundy silty clay loam, the Tama silt loam, the Muscatine silt loam, the Clinton silt loam, the Marshall silt loam and the Waukesha silt loam are presented and discussed in this bulletin.

The results secured show that crop yields may be increased on many Iowa farms ...


The Management Of Peat And Alkali Soils In Iowa, W. H. Stevenson, P. E. Brown, J. L. Boatman 2017 Iowa State College

The Management Of Peat And Alkali Soils In Iowa, W. H. Stevenson, P. E. Brown, J. L. Boatman

Bulletin (Iowa Agricultural Experiment Station)

How to handle peat soils and how to reclaim so-called, alkali spots are real problems to many farmers in north-central Iowa, large numbers of whom have found thru hitter experience the futility of attempting to grow crops on such land without special methods of treatment.

While drainage is generally recognized as the basic treatment necessary if these soils are to be successfully cropped, other treatments in addition have been found to be essential if satisfactory crop yields are to be secured on peat and alkali areas. Even with the very best system of management, several years may be required before ...


High Yielding Strains And Varieties Of Corn For Iowa, H. D. Hughes, Joe L. Robinson, A. A. Bryan 2017 Iowa State College

High Yielding Strains And Varieties Of Corn For Iowa, H. D. Hughes, Joe L. Robinson, A. A. Bryan

Bulletin (Iowa Agricultural Experiment Station)

This publication is a report of the Iowa Corn Yield Test, the primary object of which is to locate the strains and varieties which will produce the largest yields of dry shelled corn in the different sections and districts of the state. The Farm Crops Section of the Iowa Agricultural Experiment Station has cooperated with the Iowa Corn and Small Grain Growers’ Association from the time the work was first undertaken in 1920. Since 1922 this cooperation has been shared by the Office of Cereal Crops and Diseases of the United States Department of Agriculture which at that time assigned ...


Species And Varietal Crosses In Cucurbits, A. T. Erwin, E. S. Haber 2017 Iowa State College

Species And Varietal Crosses In Cucurbits, A. T. Erwin, E. S. Haber

Bulletin (Iowa Agricultural Experiment Station)

A preponderance of parthenocarpic fruits is one of the outstanding features of this investigation. Out of approximately 3,000 crosses, 369 fruits were secured, over 99 percent of which were parthenocarpic.

A second significant fact is the pronounced manifestations of impotence of the species hybrids in cucurbits. Sexual derangement, especially of the staminate organs, was clearly evidenced. In a number of the crosses which resulted in fertile seeds, there were pronounced manifestations of physiological weakness. These symptoms of either impotence or physiological weakness characterize the crosses of C. pepo and C. maxima and of C. moschata and C. maxima and ...


The Inoculation Of Non-Legumes, L. W. Erdman, P. E. Brown 2017 Iowa State College

The Inoculation Of Non-Legumes, L. W. Erdman, P. E. Brown

Bulletin (Iowa Agricultural Experiment Station)

The discovery of the importance of the inoculation of legume crops, such as clovers and alfalfa, some 40 years ago, in order to secure larger crops and increase the fertility of the soil, has led to many attempts to devise a culture which would bring about similar beneficial effects on non-legumes.

The first commercial culture, known as Alinit, appeared in 1895. It was supposed to increase the nitrogen content of the soil thru the introduction of free-living nitrogen fixing organisms and thus supply nitrogen for the better growth of all crops. It failed. Other cultures, appearing from time to time ...


Relation Of Certain Ear And Kernel Characters Of Reid Yellow Dent Corn To Yield, H. D. Hughes, Joe L. Robinson 2017 Iowa State College

Relation Of Certain Ear And Kernel Characters Of Reid Yellow Dent Corn To Yield, H. D. Hughes, Joe L. Robinson

Bulletin (Iowa Agricultural Experiment Station)

Considerable attention has been given to to the possible relationships which may exist between various visible characters in the seed ear and the relative ability of such seed to produce satisfactory yields when planted. The extent to which it is possible to influence the yield of corn by selecting seed with certain ear and kernel characters is a question of practical interest to all corn growers.

The practical corn growers of the past, as well as those o f the present, in saving ears for seed, have probably had in mind characters believed to be associated with or contributing to ...


Sweet Corn Seed Studies, A. T. Erwin, E. S. Haber 2017 Iowa State College

Sweet Corn Seed Studies, A. T. Erwin, E. S. Haber

Bulletin (Iowa Agricultural Experiment Station)

Sweet corn is the most important canning crop grown in Iowa. The average annual pack in this state for the past five years is approximately 2,500,000 cases. High grade seed, both as to canning quality and vitality, is of primary importance to the canning industry. Due perhaps to its sugary character, sweet corn is more difficult to cure than field corn. Also, it is a plant of less vigor and more subject to diseases. Greater care is therefore required in curing and handling the seed.

This study was undertaken to secure information regarding:

1. Methods of hastening the ...


Effects Of Eight Herbicides On In Vitro Hatching Of Heterodera Glycines, A. T. S. Wong, G. L. Tylka, R. G. Hartzler 2017 Iowa State University

Effects Of Eight Herbicides On In Vitro Hatching Of Heterodera Glycines, A. T. S. Wong, G. L. Tylka, R. G. Hartzler

Gregory Tylka

Laboratory studies were conducted to evaluate effects of selected herbicides on hatching of free eggs of the soybean cyst nematode, Heterodera glycines. The herbicides used were Atrazine (atrazine), Basagran (bentazon), Bladex (cyanazine), Blazer (acifluorfen), Command (clomazone), Lasso (alachlor), Sonalan (ethalfluralin), and Treflan (trifluralin). Treatments comprised two concentrations of commercial herbicide formulations and deionized water and 3.14 mM zinc sulfate as negative and positive controls, respectively. Eggs were extracted from females and cysts, surface disinfested, and incubated in herbicide or control solutions at 25 ± 2 C in darkness. Hatched second-stage juveniles were counted every other day for 24 days. Hatching ...


Evaluating Mine Soil Prepared By Scraper Pans For Herbaceous Plants And Pine Seedlings At An East Texas Lignite Surface Mine, Hannah Z. Angel 2017 Stephen F. Austin State University

Evaluating Mine Soil Prepared By Scraper Pans For Herbaceous Plants And Pine Seedlings At An East Texas Lignite Surface Mine, Hannah Z. Angel

Electronic Theses and Dissertations

Since 1974, Luminant Mining Company, LLC (Luminant) has planted over 38.7 million trees on its reclaimed lignite surface mine operations in Texas. For decades, the use of improved reclamation techniques on Luminant’s mined lands have resulted in over 31,160 ha reclaimed to forests, wildlife habitat, and pastures with productivity levels similar to those found on unmined lands. The development of new reclamation methodologies offers opportunities to further improve productivity of planted trees at Luminant’s Martin Lake Oak Hill Mine in east Texas. The conventional haulback or ‘truck shovel’ reclamation method uses haul trucks for the selective ...


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