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DEPARTMENT BULLETIN No. 1402.-TIMBER GROWING AND LOGGING PRACTICE

IN THE CALIFORNIA PINE REGION:

Introduction

Measures necessary to keep forest lands productive_.

The California pine region and forests--.

Rôle of advance reproduction and seed trees.

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Problems of the timber owner_.

Fire protection and slash disposal..

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The general protective system.

Slash disposal.-.

The needs for systematic protection of cut-over lands....

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Number of seed trees left in current cutting practice on pri-

vate lands___

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The returns to the landowner_.

Summary of essential measures.

The practicability of the measures proposed__

Measures necessary to produce full timber crops..

Conditions affecting private timber growing.

Basic principles of full timber-crop production.

Slash disposal and fire protection.

Piling and burning---

Costs of slash disposal and special fire protection_.

Protection against insects and diseases--

Methods of logging---

Additional measures to insure best timber growth.

Additional measures in cutting practice----

Selection of seed trees_

Selection of trees to leave for growth.

Cutting unmerchantable trees.

Cost of cutting restrictions_.

Essential steps in producing full timber crops.

The total cost of the measures.....

The opportunities for private forestry-

Literature cited----

DEPARTMENT BULLETIN No. 1403.-SEGREGATION AND CORRELATED INHERIT-

ANCE IN MARQUIS AND HARD FEDERATION CROSSES, WITH FACTORS FOR

YIELD AND QUALITY OF SPRING WHEAT IN MONTANA:

Larger yields of wheat with present quality desired_

Material and methods__

Parent material_.

Methods used___

Segregation of characters in the F2 and F3 generations-

Dwarfness__.

Awnedness__.

Glume color__.

Kernel color___.

Heading period.

Ripening period

Fruiting period____

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DEPARTMENT BULLETIN No. 1403.-SEGREGATION AND CORRELATED INHERIT-

ANCE IN MARQUIS AND HARD FEDERATION CROSSES, WITH FACTORS FOR

YIELD AND QUALITY OF SPRING WHEAT IN MONTANA-Continued.

Segregation of characters in the F. and F. generations-Continued.

Height__.

Yield---

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Crude-protein content..

Combined characters_.

Correlation of characters in the F2 and F3 generations__.

Heading period....

Ripening period.

Fruiting period..

Height..

Yield___

Crude-protein content_

Summary----

Literature cited---

DEPARTMENT BULLETIN NO. 1404.-TENANCY AND OWNERSHIP AMONG

NEGRO FARMERS IN SOUTHAMPTON COUNTY, VA.:

Purpose and scope of study.

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Changes in agriculture and agricultural organization of Southampton

County since 1860..

Changes in the value of other kinds of farm property.

Changes in farm tenure in the section___.

Negro population and farm tenure in Southampton County.

Size and value of farms and of farm property--

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Changes in tenure status of the farmers surveyed__

Net worth of farmers and kinds of property owned..

Indebtedness and credit.

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Accumulation of wealth in relation to value and size of farm__.

Relation of tenure and success in accumulation to education of

Periodical reading material in homes_-_-

Extent of migration and degree of stability of occupancy.

Summary and conclusions__-

DEPARTMENT BULLETIN No. 1405.-GRAZING PERIODS AND FORAGE PRODUC-

Grazing periods in each vegetative type---

Pago

DEPARTMENT BULLETIN No. 1405.-GRAZING PERIODS AND FORAGE PRODUC-

TION ON THE NATIONAL FORESTS-Continued.

Effect of frequency of pasturing on forage production and longevity

of vegetation___.

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DEPARTMENT BULETIN NO. 1406.-THE RIPENING, STORAGE, AND HANDLING

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Softening of apples on the tree_.

Pressure test as a measure of fruit maturity.

Ground color of apples--‒‒‒

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II. The ripening of apples in storage as influenced by temperature__

Influence of temperature on rate of softening-

Rates of softening at different temperatures..

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Influence of storing at low temperatures on softening rate

when removed to high temperatures---

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Influence of time of picking on softening of apples stored

at various temperatures..

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Yellowing of fruit in storage as affected by temperature__

Changes in chemical composition of apples stored at dif-

ferent temperatures

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Respiration rate of apples at different temperatures_.

Summary of Part II.

DEPARTMENT BULLETIN No. 1407.-SOME RESULTS OF SOFT PORK INVESTI-

GATIONS:

Statement of supervision and authorship.

The soft-pork problem___.

DEPARTMENT BULLETIN No. 1407.-SOME RESULTS OF SOFT PORK INVESTI-

GATIONS Continued.

Results of these investigations_---

A. Corn with tankage, fish meal, and wheat middlings_

B. Peanuts ---

C. Corn with nonsoftening protein supplements following pea-

nuts

D. Soy beans__

E. Corn with tankage following soy beans___

F. Soy bean plus a medium ration of shelled corn_.

G. Rice polish with tankage_.

H. Various oils added to basal rations.

1. Brewers' rice with tankage...

J. Peanut meal with corn_.

Other questions under investigation__

Summary

Literature cited

DEPARTMENT BULLETIN No. 1408.-STRUCTURES USED IN DRAINING AGRI-

CULTURAL LAND:

Introduction

Structures for use with underdrains---

Manholes___.

Surface-water inlets__

Lamp holes_.

Cradles

Angle boxes

Lateral connections

Outlets.

Crossings under railroads and canals_

Lumber box drains____

Structures for open ditches.

Drops and checks.

Timber linings in open ditches_

Surface-water inlets__.

Stock guards

Sluiceways and tide gates___

Ocean outlets

Bridges and culverts

Flumes and inverted siphons_.

Miscellaneous structures..

Pump houses ---

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Our competitive agriculture_.

Need for understanding conditions in South America_.

Position and size of Argentina.

DEPARTMENT BULLETIN No. 1409.-AGRICULTURAL SURVEY OF SOUTH

AMERICA.-ARGENTINA AND PARAGUAY-Continued.

Potential agricultural production__

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Sources of information relating to Paraguay-

DEPARTMENT BULLETIN No. 1410.-THE BROWN ROOT ROT OF TOBACCO AND

OTHER PLANTS:

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Introduction

Symptoms of brown root rot--

Historical review__.

Isolation from diseased roots.

Evidence regarding the nature of the disease_-

Plants affected---.

Variety and strain tests with tobacco_

Influence of soil conditions---.

Influence of drying and aeration_

Field-plat experiments---.

Discussion of results--

Summary

Literature cited-----

DEPARTMENT BULLETIN No. 1411.-EXPENSE FACTORS IN CITY DISTRIBU-

TION OF PERISHABLES:

City distribution exemplified by New York metropolitan area.

The metropolitan distribution system__.

Basis of analysis of distribution expense_-

Collection of original price data_

Adjustment for shrinkage in retailing-

Method of data analysis----.

Analysis of commodity differences_.

Contrasts in service requirements__-

Size of sale as criterion of service requirements__

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Size of sale as an adequate explanation of percentage margins__

Deductions from size-of-sale analysis__

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Apportionment of distribution expense between jobber and retailer__

Reasons for variability of jobbers' portion___

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Influence of wholesale price changes on jobbers' spread___.

Conclusions regarding variability of jobbers' price spread_.

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Analysis of types of store operation.

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Classification of store types---

Extent of data____.

Manner of making comparisons_

Adjustment of data...

Differentials showing contrasts in distribution expense per car--

Differentials showing contrasts in prices to consumers.

Implications in commodity differences_

Influence of common monetary and physical units..

Influence of a new unit of distribution__.

How retail prices are set---

Summary of application of theory---_.

Limitations of percentage differentials for comparing prices---.