EFFECT OF AVAILABLE SOIL NITROGEN ON YIELDS AND RESPONSE OF BRUSSELS SPROUTS TO APPLIED NITROGEN IN THE FIELD

1970 ◽  
Vol 50 (3) ◽  
pp. 261-266 ◽  
Author(s):  
D. C. MUNRO ◽  
J. A. CUTCLIFFE
Keyword(s):  
Soil Nitrogen ◽  
Leaf Tissue ◽  
Yield Potential ◽  
Soil Tests ◽  
Available Nitrogen ◽  
Brussels Sprouts ◽  
Tissue Nitrogen ◽  
Total Soil Nitrogen ◽  
Applied Nitrogen

Determination of nitrate nitrogen in the soil at transplanting time was the best soil test for prediction of yield potential and relative response of Brussels sprouts (Brassica oleracea var. gemmifera DC, Jade Cross) to applied nitrogen. Actual fertilizer nitrogen requirement of a soil could not be predicted from soil tests. Total soil nitrogen was the best alternative to original soil nitrate for prediction of yield potential of the soil. Total nitrogen in leaf tissue from maximum-yielding plots averaged 5.6%. Approximately 5.2% tissue nitrogen was necessary for good yields. Concentration of nitrogen in leaf tissue from control plots could not be predicted from soil tests for available nitrogen. Over a period of three years at four locations per year, 67 kg nitrogen per ha applied in bands was adequate for maximum yields of Brussels sprouts at most locations.

AN EVALUATION OF NITROGEN SOIL TEST METHODS FOR ONTARIO SOILS

1966 ◽  
Vol 46 (2) ◽  
pp. 185-194 ◽  
Author(s):  
J. A. Smith
Keyword(s):  
Soil Nitrogen ◽  
Dry Matter ◽  
Nitrogen Availability ◽  
Test Methods ◽  
Soil Test ◽  
Soil Nitrogen Availability ◽  
Available Nitrogen ◽  
Nitrogen Contents ◽  
Total Soil Nitrogen

Several methods for providing an index of the availability of soil nitrogen were evaluated by relating laboratory soil test values to yields of dry matter and uptake or nitrogen by orchardgrass in the greenhouse. Determination of soil organic matter or total soil nitrogen contents was relatively ineffective. Available nitrogen initially present in the soil at sampling time, extracted by several different methods, was superior to measurements of nitrogen released upon incubation. The nitrate form of nitrogen, either initially present or released upon incubation, served as a better index of soil nitrogen availability than the ammonium form. Inclusion of initial nitrates and nitrates released upon incubation as independent variables in a multiple regression resulted in the highest correlation with total nitrogen uptake. In the three incubation methods evaluated, discarding the initial nitrogen content of the soil, as is commonly done, severely reduced the validity of the tests as measures of nitrogen availability.

RELATIONSHIP OF YIELD AND TOTAL NITROGEN UPTAKE OF BRUSSELS SPROUTS PLANTS GROWN IN THE GREENHOUSE TO AVAILABLE SOIL NITROGEN

1969 ◽  
Vol 49 (3) ◽  
pp. 313-318 ◽  
Author(s):  
D. C. Munro
Keyword(s):  
Total Nitrogen ◽  
Soil Nitrogen ◽  
Nitrogen Uptake ◽  
Nitrate Nitrogen ◽  
Soil Samples ◽  
Moist Soil ◽  
Available Nitrogen ◽  
Air Drying ◽  
Brussels Sprouts ◽  
Relationship Of

Initial nitrate-nitrogen content of the soil gave a correlation coefficient (r) of 0.93 with yields and with total nitrogen uptake of Brussels sprouts plants (Brassica oleracea var. gemmifera DC., Jade Cross). Soil nitrogen extracted with 0.01 M NaHCO3 gave r values of 0.76 with yields and 0.75 with nitrogen uptake. Nitrate incubation results from leached, moist soil samples gave r values of 0.59 with yields and 0.56 with nitrogen uptake. However, air-drying of soil samples prior to leaching and incubation resulted in r values of only 0.15 and 0.11 with yields and nitrogen uptake, respectively. Available nitrogen determined by incubation without previous leaching of the soil samples gave high r values because of the influence of the initial nitrate nitrogen in the soil.

Herbage production and the accumulation of soil nitrogen under irrigated pastures on the Riverine Plain

1974 ◽  
Vol 14 (66) ◽  
pp. 49 ◽  
Author(s):  
CR Kleinig ◽  
JC Noble ◽  
AJ Rixon
Keyword(s):  
Perennial Ryegrass ◽  
Soil Nitrogen ◽  
White Clover ◽  
Accumulation Rate ◽  
Total Yield ◽  
Subterranean Clover ◽  
Nitrogen Accumulation ◽  
Total Soil ◽  
Total Soil Nitrogen ◽  
Applied Nitrogen

Herbage yield, herbage nitrogen, and soil nitrogen accumulation were followed over a five-year period (1958-63) under irrigated annual and perennial pastures established initially with different clovergrass proportions. Species sown in the annual pasture treatments were subterranean clover (Trifolium subterraneum cv. Tallarook) and annual ryegrass (Lolium rigidum cv. Wimmera). Those used in the perennial mixtures were white clover (T. repens cv. Irrigation) and perennial ryegrass (L. perenne cv. Victorian). In the treatments sown to annual or perennial ryegrass only, nitrogenous fertilizer as urea was applied annually at four rates. Total soil nitrogen (mat + 0-91 cm of soil) after five years did not differ significantly for annual pasture and bare ground. In contrast, total soil nitrogen under all perennial pasture treatments, particularly those with a white clover component, was significantly greater than for bare soil (5365 cf. 4181 kg ha-1). Where white clover was sown, nitrogen accumulated at the rate of 258 kg ha-1 per annum compared with 101 kg ha-1 per annum under subterranean clover, the latter barely matching the accumulation rate under perennial ryegrass sown alone without applied nitrogen (105 kg N ha-1 p.a.). Nitrogen accumulation (soil plus mat) was related to both legume and non-legume nitrogen. Perennial pasture, particularly if white clover was present, generally outyielded annual pasture. The total yield of white clover over five years was 29,970 kg ha-1 compared with 11,614 kg ha-1 for subterranean clover. Annual and perennial ryegrasses showed similar yield responses to applied nitrogen. Irrespective of the rate of urea application, nitrogen recovery was low (21-23 per cent).

Substitution of reduced iron by zinc in total soil nitrogen estimation by modified Olsen's method

1987 ◽  
Vol 108 (3) ◽  
pp. 681-682
Author(s):  
Praveen-Kumar ◽  
R. K. Aggarwal
Keyword(s):  
Soil Nitrogen ◽  
Total N ◽  
Total Soil ◽  
Kjeldahl Method ◽  
Total Soil Nitrogen ◽  
Quantitative Recovery

The conventional Kjeldahl method which is usually employed for determination of total N in soil does not effect quantitative recovery of NO2- or NO3- (Bremner, 1965). Therefore, various modifications have been suggested (Cope, 1916; Davisson & Parson, 1919). Bremner (1965) observed that the quantitative recovery of NO2- and NO3- by any method, other than the modified Olsen's method (Bremner & Shaw, 1958), is not certain.

EFFECT OF VARIOUS PERIODS OF SEED-DOWN TO ALFALFA AND BROMEGRASS ON SOIL NITROGEN

1971 ◽  
Vol 51 (1) ◽  
pp. 65-73 ◽  
Author(s):  
W. S. FERGUSON ◽  
B. J. GORBY
Keyword(s):  
Total Nitrogen ◽  
Soil Nitrogen ◽  
Nitrogen Loss ◽  
Nitrogen Absorption ◽  
Aerobic Incubation ◽  
Available Nitrogen ◽  
Plant Nitrogen ◽  
Acid Hydrolysate ◽  
Total Soil ◽  
Total Soil Nitrogen

Total soil nitrogen decreased substantially during the 12-year period (1954 to 1965) in a coarse-textured Chernozemic soil located at Brandon, Manitoba. The amount of nitrogen loss was related to cropping practices. The loss was 24% when the soils were continuously summerfallowed and 16% when the soil was producing alfalfa, during eight of the 12 years. Other perennial crops (bromegrass, and a mixture of bromegrass and alfalfa) had similar effects on total nitrogen to those of alfalfa. The loss of soil nitrogen was inversely proportional to the intensity of cropping during the 12-year period. The availability of soil nitrogen, as assessed for wheat production during the four-year period 1966 to 1969, was directly proportional to the intensity of cropping during 1954 to 1965, and was increased by alfalfa production. The total nitrogen absorbed by three crops of wheat was closely related to the amount of nitrate nitrogen in the soil to a depth of 122 cm at the beginning of the three years of production. It was not related to total soil nitrogen. The protein content of the grain was related to intensity of cropping and alfalfa production. The change in the amount of nitrogen in the amino acid, hexosamine, ammonia, and unidentified fractions of an acid hydrolysate of these soils was proportional to the change in total soil nitrogen. It did not appear to be related to changes in available nitrogen as measured by soil nitrate, plant nitrogen absorption or nitrate released on aerobic incubation.

Soil Nitrogen Movement under Sustainable Vegetable Production Systems

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 494f-495 ◽  
Author(s):  
Amy M. Johnson ◽  
Greg D. Hoyt
Keyword(s):  
Pest Management ◽  
Soil Nitrogen ◽  
Conservation Tillage ◽  
Management Strategies ◽  
Conventional Tillage ◽  
Plant Diseases ◽  
Vegetable Production ◽  
Beneficial Arthropods ◽  
Weed Species ◽  
Available Nitrogen

An experiment was established to determine the effect of different tillage practices, vegetable crop rotations, and pest management strategies on crop yield, plant diseases, pest and beneficial arthropods, weed species changes over time, and soil environmental consequences. This poster describes nitrogen movement from the various treatments over a 3-year rotation. The treatments are: 1) conventional tillage with chemically based IPM; 2) conventional tillage with biologically based IPM; 3) conservation tillage with chemically based IPM; 4) conservation tillage with biologically based IPM; and 5) conventional tillage with no fertilizer or pest management. Mid-season soil analyses with depth showed chemical-fertilized plowed and conservation-tilled treatments with more soil available nitrogen at most depths compared to the biological-based IPM systems (soybean meal was used as a nitrogen source). However, the biological-based systems did supply enough soil nitrogen to produce similar yield results as the chemical-based systems. Less soil nitrate was measured in the 30- to 90-cm depths at harvest from the biological-based systems than chemical-based systems. Conservation-tilled systems had greater nitrate with depth compared to conventional-tilled systems.

Effect of Prescribed Burning of Forest Litter on Total Soil Nitrogen

1962 ◽  
Vol 26 (2) ◽  
pp. 200-202 ◽  
Author(s):  
J. O. Klemmedson ◽  
A. M. Schultz ◽  
H. Jenny ◽  
H. H. Biswell
Keyword(s):  
Soil Nitrogen ◽  
Prescribed Burning ◽  
Forest Litter ◽  
Total Soil ◽  
Total Soil Nitrogen

scholarly journals Relationship Between Root and Yield Related Morphological Characters in Pea (Pisum Sativum L.)

2014 ◽  
Vol 66 (1) ◽  
pp. 3-15
Author(s):  
Sylwia Ciaglo-Androsiuk
Keyword(s):  
Root System ◽  
Morphological Traits ◽  
Lateral Roots ◽  
Morphological Characters ◽  
Yield Potential ◽  
Cultivated Plants ◽  
Genetic Determination ◽  
Canonical Correlations ◽  
Effect On Yield

AbstractRelation between morphological traits of the root system and yield related traits is an important issue concerning efforts aiming at improving of ideotype of cultivated plants species, including pea. In this paper, to analyse the dependency between traits describing the root system morphology and yield potential, Person’s andSpearman's_correlations as well as canonical correlations were used.Root system was analyzed in 14 and 21 day-old seedlings growing in blotting-paper cylinders. Yield potential of pea was analysed in a field experiment. Results of Person’s and Spearman's_correlations revealed that number of lateral roots and lateral roots density were correlated witch yield related traits. Correlation between root length and shoot length was observed only for 14 day-old seedlings. The result of canonical correlations revealed that number of lateral roots and lateral roots density had the largest effect on yield related traits. This work highlights, that in order to improve the yield of pea it might become necessary to understand genetic determination of morphological traits of the root system, especially number of lateral roots.

scholarly journals PENENTUAN WAKTU TANAM PADI SAWAH DI KABUPATEN SANGIHE DENGAN MENGGUNAKAN MODEL SIMULASI SHIERARY RICE

EUGENIA ◽  
2015 ◽  
Vol 21 (3) ◽  
Author(s):  
Farida Fattah ◽  
J. E.X. Rogi ◽  
Mariam M. Toding
Keyword(s):  
Cost Savings ◽  
Simulation Models ◽  
Field Capacity ◽  
Paddy Rice ◽  
Yield Potential ◽  
Potential Yield ◽  
Planting Time ◽  
The North ◽  
Humidity Field

ABSTRACT   Decline in rice production in Sangihe Island partly due to climate change and the implementation of a less precise planting time. Rice Shierary  model was used to predict the timing of planting paddy and has advantages in time and cost savings. This study aims to determine the exact time of planting in paddy rice crops in the district of South Manganitu, North Tabukan and Tamako, as well as to determine whether the results of the simulation model Shierary Rice together with the results obtained from the Central Bureau of Statistic Sangihe Islands. Input model consists of solar radiation, rainfall, temperature and humidity, field capacity, permanent wilting point, varieties, irrigation, nitrogen fertilization, longitude and latitude of the study area. While the output was paddy rice yield potential. It can be concluded that (a) the appropriate planting time of paddy in the South Manganitu namely in June with a potential yield of 4.25 tonha-1 and March with a potential yield of 3.88 tonha-1. (b) the appropriate planting time of paddy in the  North Tabukan namely in June with a potential yield of 4.27 tonha-1 and March with a potential yield of 3.62 tonha-1. (c) the appropriate planting time of paddy in Tamako ie in March with a potential yield of 3.58 tonha-1 and February with a potential yield of 3.28 tonha-1. (d) the yield of rice field paddy with the determination of planting time by using the model of Shierary Rice nearing/line with productivity results which obtained by the Central Statistics Agency (BPS) Sangihe Islands. Keywords: planting, paddy, simulation models, Shierary Rice

Sign in / Sign up

Export Citation Format

Share Document