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1. Weed value

Author:
Campbell, E.G.
Source:
Agronomy journal 1924 v.16 no.2 pp. 91-96
ISSN:
0002-1962
Subject:
depth,   etc   ; perennial weeds; roots; ecosystems; nitrates; soil fertility; biennials; crops; Indiana;     Show all 9 Subjects
DOI:
10.2134/agronj1924.00021962001600020003x

2. Hay crops. D. Legumes for acid soils

Author:
Leach, C.F.
Source:
Agronomy journal 1924 v.16 no.3 pp. 173-178
ISSN:
0002-1962
Subject:
depth,   etc   ; legumes; roots; mineral content; soil fertility; soil bacteria; soil inoculation; solar radiation; acid soils; green manures;     Show all 10 Subjects
DOI:
10.2134/agronj1924.00021962001600030005x

3. Colorimetric methods for the determination of readily available phosphorus in soils

Author:
Rost, C.O.; Pinckney, R.M.
Source:
Agronomy journal 1932 v.24 no.5 pp. 377-395
ISSN:
0002-1962
Subject:
soil depth,   etc   ; phosphorus; phosphorus fertilizers; soil analysis; colorimetry; nutrient availability; loam soils; silt loam soils; silty soils; Minnesota;     Show all 10 Subjects
Abstract:
... The Illinois, Wisconsin, and La Motte-Truog methods for the determination of readily available phosphorus were used in a study of the soils of 10 experimental fields in southeastern Minnesota upon which the responses to phosphate fertilizer were already known. Samples of soil were collected at three depths from five different locations on 116 control plats. All samples were tested separately by th ...
DOI:
10.2134/agronj1932.00021962002400050006x

4. Further studies on soil respiration

Author:
Smith, F.B.; Brown, P.E.
Source:
Agronomy journal 1932 v.24 no.7 pp. 577-583
ISSN:
0002-1962
Subject:
soil depth,   etc   ; carbon dioxide; soil analysis; soil air; loam soils; diffusion;     Show all 6 Subjects
Abstract:
... The rate of respiration in a typical Carrington loam was determined by titrametric and volumetric methods. The data secured showed no apparant relation between the determinations by the two methods. The rate of respiration during several successive periods was determined by the Lundegardh method. It was found that some other factor than rate of diffusion had an influence on the rate of respiration ...
DOI:
10.2134/agronj1932.00021962002400070011x

5. Organic matter as a factor in classification of the soils of dry regions

Author:
Shaw, C.F.
Source:
Agronomy journal 1932 v.24 no.7 pp. 565-577
ISSN:
0002-1962
Subject:
soil depth,   etc   ; soil classification; arid zones; textural soil types; soil parent materials; nitrogen content; soil water content; air temperature; rain; soil pH; altitude; humus; soil color; vegetation; California;     Show all 15 Subjects
Abstract:
... We must conclude from these studies that the organic matter content is not dominant in determining the color of the soils in regions of periodic precipitation with hot dry summers and cool moist winters, and that it occupies a very minor place in determining the characteristics of soil profiles. Of much more importance in profile development, and consequently to soil classification, are the minera ...
DOI:
10.2134/agronj1932.00021962002400070010x

6. Reaction and calcium content of drainage water from peat deposits in New York

Author:
Wilson, B.D.; Staker, E.V.; Townsend, G.R.
Source:
Agronomy journal 1932 v.24 no.8 pp. 589-593
ISSN:
0002-1962
Subject:
soil depth,   etc   ; peat soils; drainage water; soil pH; calcium; calcium oxide; subsoil; seasonal variation; New York;     Show all 9 Subjects
Abstract:
... The drainage waters from the cultivated peat soils of the investigation were found in general to be slightly alkaline in reaction and to contain calcium in varying concentrations. Some of the waters from peats of relatively high acidity are acid in reaction. The drainage water from the cultivated types of peat was found to be acid in reaction when the material underlying the deposit is non-calcare ...
DOI:
10.2134/agronj1932.00021962002400080001x

7. The availability and downward movement of rock phosphate in Illinois soils when used liberally for 25 to 30 years and influence of the treatment on available potash and total nitrogen

Author:
Thor, A.U.
Source:
Agronomy journal 1933 v.25 no.10 pp. 661-674
ISSN:
0002-1962
Subject:
soil depth,   etc   ; Vigna unguiculata; Zea mays; nitrogen content; nitrogen; nutrient availability; calcium; subsoil; Medicago sativa; magnesium; crop yield; Triticum aestivum; Avena sativa; potassium; pH; phosphorus; rock phosphate; Illinois;     Show all 18 Subjects
Abstract:
... A study was made of the availability and downward movement of phosphorus in the soils of three Illinois corn belt farms to which liberal amounts of rock phosphate had been applied during the past 25 to 30 years. In all three cases, rock phosphate has given satisfactory results. Surface, subsurface, and subsoil samples were secured in 1931 from phosphated and unphosphated areas of these farms. Thes ...
DOI:
10.2134/agronj1933.00021962002500100003x

8. The absorption and movement of sodium chlorate when used as an herbicide

Author:
Loomis, W.E.; Smith, E.V.; Bissey, R.; Arnold, L.E.
Source:
Agronomy journal 1933 v.25 no.11 pp. 724-739
ISSN:
0002-1962
Subject:
soil depth,   etc   ; application rate; perennial weeds; foliar spraying; weed control; sodium chlorate; transpiration; degradation; Zea mays; indicator species; air temperature; leaching; translocation (plant physiology); Cirsium arvense; phloem; water content; xylem; autoclaving; phytotoxicity; Kalanchoe pinnata; absorption; herbicide residues; storage; rhizomes; chemical control; Nerium oleander;     Show all 26 Subjects
Abstract:
... 1. Serum chlorate apparently penetrates readily all of the external surfaces of the plant with the exception of unusually heavy cuticle or corky layers and may be expected to gain entrance to the plant whether applied to the leaves, to herbaceous stems, to rhizomes, or to roots. 2. The data presented indicate that the movement of sodium chlorate within the plant is principally in the xylem and is ...
DOI:
10.2134/agronj1933.00021962002500110002x

9. Earliness in northern corn as affected by phosphate fertilizers, manure, and other soil treatments

Author:
Olson, P.J.; Walster, H.L.
Source:
Agronomy journal 1934 v.26 no.3 pp. 205-213
ISSN:
0002-1962
Subject:
soil depth,   etc   ; animal manures; Zea mays; early development; phosphorus; phosphorus fertilizers; soil treatment; potassium; phosphates; profitability; clay soils; soil chemistry; crop rotation; crop yield; Avena sativa; Triticum aestivum; application rate; North Dakota;     Show all 18 Subjects
Abstract:
... The comparative maturity of corn was studied during an 8-year period on plats receiving various soil treatments. Phosphorus advanced maturity significantly. During 3 of the 8 years when the date on which plants silked in the various plats was determined, it was found that phosphorus had advanced silking about 2 days. The combination of manure and phosphorus advanced the silking date about 3 days d ...
DOI:
10.2134/agronj1934.00021962002600030005x

10. The effect of nitrogenous fertilizers on the growth of lawn grasses

Author:
Zahnley, J.W.; Duley, F.L.
Source:
Agronomy journal 1934 v.26 no.3 pp. 231-234
ISSN:
0002-1962
Subject:
soil depth,   etc   ; Poa pratensis; grasses; weed control; application timing; sodium nitrate; composts; silt loam soils; lawns and turf; crop yield; urea; soil pH; Taraxacum officinale; ammonium sulfate; application rate; nitrogen fertilizers; Kansas;     Show all 17 Subjects
Abstract:
... Tests were conducted at the Kansas Agricultural Experiment Station during the years 1925 to 1930 with different nitrogenous fertilizers on Kentucky bluegrass, Washington bent, and German mixed bent grasses. Ammonium sulfate, sodium nitrate, and urea were about equally effective when used at such rates that equivalent amounts of nitrogen were supplied. However, there was a slight advantage for urea ...
DOI:
10.2134/agronj1934.00021962002600030008x

11. Subsoil moisture and crop sequence in relation to alfalfa production

Author:
Kiesselbach, T.A.; Anderson, A.; Russel, J.C.
Source:
Agronomy journal 1934 v.26 no.5 pp. 422-442
ISSN:
0002-1962
Subject:
soil depth,   etc   ; Medicago sativa; Zea mays; Avena sativa; Triticum aestivum; Trifolium pratense; crop yield; soil water; subsoil; crop rotation; continuous cropping; clay loam soils; rain; field capacity; Nebraska;     Show all 15 Subjects
Abstract:
... These investigations concerning subsoil moisture relation production of alfalfa, sweet clover, and red clover were conducted on adjacent areas which differed only with respect to previous cropping. Following the crop season of 1927, the field that had been cropped to alfalfa during the preceding 6 years contained an average of 14.7% moisture to a depth of 15 feet compared with 19.9% for the non-al ...
DOI:
10.2134/agronj1934.00021962002600050010x

12. Renovation of an old lawn

Author:
Welton, F.A.
Source:
Agronomy journal 1934 v.26 no.6 pp. 486-491
ISSN:
0002-1962
Subject:
soil depth,   etc   ; weeds; weed control; lawns and turf; sodium chlorate; application rate; application timing; Ohio;     Show all 8 Subjects
Abstract:
... 1. Sodium chlorate applied in the fall or winter will kill practically all weeds commonly found on lawns, including dandelion, buckhorn, broadleaved plantain, yarrow, and sorrel. 2. One pound of sodium chlorate in a gallon of water (12%) applied to 100 square feet is usually sufficient, but with unfavorable climatic and soil conditions, especially where sandstone comes close to the surface, the st ...
DOI:
10.2134/agronj1934.00021962002600060005x

13. The duration of the favorable influence of alfalfa on the cotton fields of Armenia

Author:
Mirimanian, K.P.
Source:
Agronomy journal 1934 v.26 no.6 pp. 475-480
ISSN:
0002-1962
Subject:
soil depth,   etc   ; exchangeable calcium; crop yield; specific gravity; carbon dioxide; capillarity; porosity; Gossypium hirsutum; exchangeable potassium; continuous cropping; exchangeable sodium; silty soils; exchangeable magnesium; water holding capacity; humus; clay soils; nitrogen; Medicago sativa; particle size; Armenia;     Show all 20 Subjects
Abstract:
... Thus it is to be seen that during 4 years of uninterrupted cultivation to cotton following prolonged cropping to alfalfa, this soil undergoes many changes. The first year of cotton cultivation, i.e., immediately after the plowing under of the alfalfa, the humus, total nitrogen, and exchangeable Ca increased noticeably, accompanied by a slight increase of moisture-holding capacity and total porosit ...
DOI:
10.2134/agronj1934.00021962002600060003x

14. Distribution of fertilizer residues in the soil after fourteen years of a fertilizer experiment with alfalfa

Author:
Metzger, W.H.
Source:
Agronomy journal 1934 v.26 no.7 pp. 620-625
ISSN:
0002-1962
Subject:
soil depth,   etc   ; animal manures; Medicago sativa; continuous cropping; phosphorus; potassium; superphosphate; rock phosphate; potassium sulfate; sodium nitrate; soil pH; exchangeable cations; application rate; Kansas;     Show all 14 Subjects
Abstract:
... Soil samples taken at various depths from the plats of a 14-year-old alfalfa stand were analyzed to determine the distribution of phosphorus and potassium residues from annual top dressings of various fertilizers. Phosphorus from superphosphate accumulated in considerable amount at the surface but penetrated the soil only in small amounts where applied alone. Less easily soluble phosphorus was fou ...
DOI:
10.2134/agronj1934.00021962002600070012x

15. The fertilizer requirement of Hagerstown soil

Author:
Gardner, F.D.
Source:
Agronomy journal 1934 v.26 no.8 pp. 661-665
ISSN:
0002-1962
Subject:
soil depth,   etc   ; grain crops; crop yield; crop rotation; superphosphate; nitrogen fertilizers; potassium fertilizers; nitrogen; losses from soil; green manures; crop residues; application rate; Pennsylvania;     Show all 13 Subjects
Abstract:
... In a 4-year grain rotation such as that followed in this experiment, liberal dressings of available phosphorus and potassium on limed land are sufficient to maintain the productivity of Hagerstown soil. Nitrogen supplied by the clover crop residues together with that fixed by non-symbiotic micro-organisms has been shown to be sufficient to meet the needs of the grain crop included in the rotation. ...
DOI:
10.2134/agronj1934.00021962002600080005x

16. The salt content of some soils near the salt plain in Alfalfa County, Oklahoma, in relation to crop production

Author:
Murphy, H.F.
Source:
Agronomy journal 1934 v.26 no.8 pp. 644-650
ISSN:
0002-1962
Subject:
soil depth,   etc   ; horticultural crops; forage crops; calcium; leachates; cover crops; soil salinity; sodium; sodium chloride; soil pH; soil salts; Oklahoma;     Show all 12 Subjects
Abstract:
... It is the purpose of this paper to present some data showing the salt content which wheat land in the Great Plains may have and yet produce a profitable yield. A few other crops are also included, but for the most part data on these are rather limited. Data on the soluble and replaceable sodium and calcium for these solonchak soils, as well as for some solonetz soils, are presented. ...
DOI:
10.2134/agronj1934.00021962002600080002x

17. A chemical study of a soil under long-continued field experiments

Author:
Snider, H.J.
Source:
Agronomy journal 1934 v.26 no.11 pp. 946-953
ISSN:
0002-1962
Subject:
soil depth,   etc   ; crop yield; limestone; NPK fertilizers; field experimentation; phosphorus; roots; application rate; shoots; long term experiments; soil analysis; Triticum aestivum; soil pH; calcium; soil organic matter; potassium; crop rotation; superphosphate; slags; nitrogen; nutrient availability; magnesium; rock phosphate; Illinois;     Show all 24 Subjects
Abstract:
... The application of relatively large quantities of superphosphate, rock phosphate, and basic slag over a long period of years created in the surface soil a large supply of residual phosphorus. The phosphorus applied to the soil in the form of rock phosphate had at the end of a 27-year period a much higher solubility than superphosphate or basic slag phosphate. The penetration of applied phosphorus ...
DOI:
10.2134/agronj1934.00021962002600110008x

18. The clay ratio as a criterion of susceptibility of soils to erosion

Author:
Bouyoucos, G.J.
Source:
Agronomy journal 1935 v.27 no.9 pp. 738-741
ISSN:
0002-1962
Subject:
soil depth,   etc   ; soil erosion; sand; silt; clay; soil types; biological resistance;     Show all 7 Subjects
Abstract:
... The Sand + Silt/Clay ratio in soils is suggested in this paper as a possible criterion of judging the relative susceptibility of soils to erosion. This ratio is designated as the clay ratio. It was compared with the erosion ratio by using the same soils and the same mechanical analyses of these soils as reported by the U. S. Bureau of Chemistry and Soils. The comparison shows that with few excepti ...
DOI:
10.2134/agronj1935.00021962002700090007x

19. The influence of seed inoculation upon the growth of black locust seedlings

Author:
Thorne, D.W.
Source:
Agronomy journal 1936 v.28 no.1 pp. 28-34
ISSN:
0002-1962
Subject:
soil depth,   etc   ; seedling growth; nitrogen content; seed inoculation; seedlings; plant characteristics; root nodules; height; Robinia pseudoacacia; length; Rhizobium; nodulation; Iowa;     Show all 13 Subjects
Abstract:
... Experiments conducted in cooperation with the U. S. Dept. of Agriculture Soil Conservation Service and Forest Service nurseries in Iowa have shown the advantages of inoculation of black locust seeds. Although there was considerable nodulation of seedlings throughout the nurseries as a result of the presence of root-nodule bacteria in the soil, seedlings growing from the inoculated seed made better ...
DOI:
10.2134/agronj1936.00021962002800010004x

20. Characteristics of some morphological solonetz soils of Minnesota

Author:
Rost, C.O.
Source:
Agronomy journal 1936 v.28 no.2 pp. 92-105
ISSN:
0002-1962
Subject:
soil depth,   etc   ; sodium carbonate; clay soils; exchangeable cations; sodium sulfate; silt loam soils; sodium bicarbonate; soil horizons; soil texture; soil pH; soil profiles; soil salts; magnesium sulfate; calcium sulfate; Minnesota;     Show all 15 Subjects
Abstract:
... Samples from six soil profiles located in the southern part of the Minnesota portion of the Red River Valley and having morphological characteristics of solodized solonetz were examined. The soils were fine textured varying from silt loams to clays. The A horizon was found to be essentially free of soluble salts, but these were present in the B horizon where they increased in amount downward to re ...
DOI:
10.2134/agronj1936.00021962002800020002x