Root behavior and crop yield under irrigation:
Gespeichert in:
| Beteiligte Personen: | , |
|---|---|
| Format: | Hochschulschrift/Dissertation Buch |
| Sprache: | Englisch |
| Veröffentlicht: |
Washington
Carnegie Institution
1924
|
| Schriftenreihe: | Publication / Carnegie Institution
357 |
| Schlagwörter: | |
| Links: | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=020180696&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| Umfang: | V, 66 S. |
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| 100 | 1 | |a Jean, Frank Covert |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Root behavior and crop yield under irrigation |c Frank Covert Jean |
| 264 | 1 | |a Washington |b Carnegie Institution |c 1924 | |
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Datensatz im Suchindex
| _version_ | 1819331075681288192 |
|---|---|
| adam_text | ROOT BEHAVIOR AND CROP YIELD UNDER
IRRIGATION
BY FRANK C JEAN AND JOHN E WEAVER
Carnegie Bncbc-r
Bepositum iff
IGNATIUS COLLBQ
! VALKENB:U RG (L )
PUBLISHED BY THE CARNEGIE INSTITUTION OF WASHINGTON
WASHINGTON, SEPTEMBER, 1924
CONTENTS
PAGE
List of illustrations iv
Introduction 3
Location and description of stations 6
Crops and methods 9
Environmental conditions, 1922 12
Experiments with alfalfa 15
Experiments with wheat 21
Experiments with sugar beets 26
Experiments with,potatoes 33
Experiments with corn , 36
Environmental conditions, 1923 44
Experiments with alfalfa 48
Experiments with wheat 49
Experiments with sugar beets : 52
Experiments with potatoes 55
Experiments with corn : 57
Summary and conclusions ; 60
Bibliography 66
in
LIST OF ILLUSTRATIONS
PLATES
PLATE 1
A Yield of alfalfa from one square rod of dry land (left) and irrigated land (right)
on July 26, of first season s growth
B Yield of grain from one square rod of lightly irrigated wheat (two containers on
left), fully irrigated but more sandy soil (center), and dry land (right), 1922
PLATE 2
Wheat, 1922: (A), dry land; (B), lightly irrigated
PLATE 3 *
Sugar beets, July 8, 1922: (A), dry land; (B), fully irrigated
PLATE 4
Potatoes, July 7, 1922: (A), dry land; (B) lightly irrigated; (C), fully irrigated
PLATE 5
Corn, July 10, 1922: (A), dry land; (B), lightly irrigated
PLATE 6
A Marquis spring wheat grown on fully irrigated soil (left), lightly irrigated but less
sandy soil (center), and dry land (right), 1922
B Wheat (3 feet high) grown on dry land, 1923, and photographed to the same scale
TEXT FIGURES
1 Hygrothermograph record for third week in July, 1923, showing usual wide fluctuations
between day and night temperature (light line) and humidity (heavy line)
2 Average day temperature (heavy lines) and average night temperature (light lines)
in dry-land (solid lines) and irrigated plats (broken lines), 1923
3 Average daily evaporation in dry-land (solid line) and irrigated plats (broken line), 1922
4 Soil temperature in dry-land (solid lines) and irrigated plats (broken lines), at depths of
3 inches (light upper lines), 6 inches (heavy lines), and 12 inches (light lower
lines), 1922
5 (A) and (B), roots of alfalfa plants 2 months old, those in dry land with greater depth
and longer branches; (C) and (D), plants 3 months old, the one from the dry land
having the greater number of branches
6 Alfalfa near the end of the first season s growth: (A), dry land; (B), irrigated soil
7 Root system of alfalfa on July 2 of second year of growth: (A), dry land; (B), irrigated
soil
8 Roots of wheat: (A) and (B), 6 weeks old, the former in soil where little water occurred
in the second foot: (C), (D), and (E), 2 5 months old in dry land, lightly irrigated
(more clayey) and fully irrigated (sandier) soils respectively
9 Roots of wheat at maturity: (A), dry land; (B), lightly irrigated; and (C), fully irrigated
soil, 1922; (D), dry land, 1923
10 Sugar beets about 2 months old: (A), dry land (practically no chresard in second foot);
(B), irrigated soil, 1922
11 Sugar beets about 3 months old: (A), dry land with low holard of subsoil; (B), fully
irrigated soil, 1922;
12 Sugar beets on September 12: (A), dry land; (B), fully irrigated soil, 1922
13 Sugar beet roots about 2 months old: (A), dry land; (B), irrigated soil; 1923
14 Sugar beets about 3 months old: (A), dry land: (B), irrigated soil; 1923
15 One-half of the root system of potatoes when 6 weeks old: (A), dry land; (B), irrigated
soil And about 9 weeks old; (C), lightly watered, and (D), fully irrigated soil,
1922; (E), mature plants, dry land, 1923
16 Root system of 6-weeks-old corn: (A), dry land; (B), lightly irrigated; (C), fully irri
gated soil
IV
List of Illustrations
17 Corn about 8 weeks old: (A), dry land; (B), lightly irrigated; (C), fully irrigated soil
18 Dry-land corn on September 12 ;
19 Corn in fully irrigated soil, September 13 !
20 Com in lightly irrigated soil, September 13 j
21 Average day air-temperatures (upper lines) and average night air-temperatures (lower
lines) in dry-land (solid lines) and irrigated plats (broken lines), 1923
22 Average day humidity (lower lines) and average night humidity (upper lines) in the
dry-land plat (solid lines) and in the irrigated plats (broken lines), 1923
23 Average daily evaporation in dry-land (solid line) and irrigated plats|(broken line), 1923
24 Soil temperature in dry-land (solid lines) and irrigat ed plats (broken lines) at depths of
3 inches (light upper lines), 6 inches (heavy lines), and 12 inches (lower light lines),
|
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| spellingShingle | Jean, Frank Covert Weaver, John E. Root behavior and crop yield under irrigation |
| subject_GND | (DE-588)4113937-9 |
| title | Root behavior and crop yield under irrigation |
| title_auth | Root behavior and crop yield under irrigation |
| title_exact_search | Root behavior and crop yield under irrigation |
| title_full | Root behavior and crop yield under irrigation Frank Covert Jean |
| title_fullStr | Root behavior and crop yield under irrigation Frank Covert Jean |
| title_full_unstemmed | Root behavior and crop yield under irrigation Frank Covert Jean |
| title_short | Root behavior and crop yield under irrigation |
| title_sort | root behavior and crop yield under irrigation |
| topic_facet | Hochschulschrift |
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