CHANGES IN NITRATE CONCENTRATION OVER WINTER IN THREE SOUTHERN ONTARIO SOIL PROFILES

1986 ◽  
Vol 66 (3) ◽  
pp. 537-541
Author(s):  
S. C. SHEPPARD ◽  
T. E. BATES
Keyword(s):  
Nitrate Concentration ◽  
Sandy Loam ◽  
Soil Profiles ◽  
Continuous Cropping ◽  
Humid Environment ◽  
Loam Soil ◽  
Cropping Seasons ◽  
N Rates ◽  
Key Words Nitrate ◽  
Generally True

Our study consisted of three sites, continuously cropped with grain corn and fertilized annually with N rates ranging from 0 to 336 kg ha−1. Soil NO3-N was measured to 90 cm at least twice yearly over three cropping seasons. In Ontario’s semi-humid environment, soil nitrate (NO3-N) is usually completely lost from soil profiles over the winter months by leaching and denitrification. We found this to be generally true over 3 yr on a sandy loam and on a silt loam soil. However, on a clay loam soil in 2 of 3 yr NO3-N concentrations in the spring were almost as high as those of the previous fall. Key words: Nitrate, corn, continuous cropping, retention

Yield and Nutrient Uptake of Peppers (Capsicum annuum) Grown with Dairy Manure Compost and Fertigated Nitrogen

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 495c-495
Author(s):  
Nancy E. Roe
Keyword(s):  
Capsicum Annuum ◽  
Sandy Loam ◽  
Leaf Tissue ◽  
Soil Improvement ◽  
Dairy Manure ◽  
Total N ◽  
Manure Compost ◽  
Loam Soil ◽  
Intensively Managed ◽  
N Rates

The use of compost as an organic source of nutrients and soil improvement may help to increase the sustainability of intensively managed vegetables. Bell pepper (Capsicum annuum L.) transplants were planted into silver-colored polyethylene mulched beds in a sandy loam soil amended with 0 or 22.4 Mg·ha–1 dairy manure compost. Preplant P was added to all beds at 78 kg·ha–1. During the season, N (as NH4NO3) was added about every 10 days. Total N rates for the season were: 0, 32, 65, or 96 kg·ha–1. Percent of N in pepper leaf tissue increased from a low of 2.7% without N to3.8% at the high N rate. Leaf P concentrations were higher in 0 N plots than in other rates. Compost resulted in higher leaf concentrations of Ca. There was an interaction of compost and N rates for percent of culls. Compost increased percentage of culls with 0 or 32 kg·ha–1 N, but decreased or did not affect cull percentage at 65, or 96 kg·ha–1 N. Compost did not affect other yield parameters measured. Marketable yields increased from 11 Mg·ha–1 with 0 N to 18 Mg·ha–1 with high N, although the regression was not significant, due to extreme variability within the field.

scholarly journals Cover Crops and N Rates Influence Sweetpotato Production

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 611e-611
Author(s):  
D.C. Sanders ◽  
G.D. Hoyt ◽  
J.C. Gilsanz ◽  
J.M. Davis ◽  
J.T. Garrett ◽  
...  
Keyword(s):  
Cover Crops ◽  
Cover Crop ◽  
Crop Production ◽  
Sandy Loam ◽  
Crop Cover ◽  
Crimson Clover ◽  
No Till ◽  
Loam Soil ◽  
N Rates ◽  
Winter Fallow

`Jewel' sweetpotato was no-till planted into crimson clover, wheat, or winter fallow. Then N was applied at 0, 60, or 120 kg·ha–1 in three equal applications to a sandy loam soil. Each fall the cover crop and production crop residue were plowed into the soil, beds were formed, and cover crops were planted. Plant growth of sweetpotato and cover crops increased with N rate. For the first 2 years crimson clover did not provide enough N (90 kg·ha–1) to compensate for the need for inorganic N. By year 3, crimson clover did provide sufficient N to produce yields sufficient to compensate for crop production and organic matter decomposition. Soil samples were taken to a depth of 1 m at the time of planting of the cover crop and production crop. Cover crops retained the N and reduced N movement into the subsoil.

scholarly journals 655 PB 037 POTATO YlELD AND SOIL NlTRATE CONCENTRATIONS INFLUENCED BY NITROGEN APPLICATION AND ENVIRONMENTAL CONDITIONS

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 526e-526
Author(s):  
S. B. Sterrett ◽  
D. V. Midkiff ◽  
C. P. Savage
Keyword(s):  
Tuber Yield ◽  
Slow Release ◽  
Nitrate Concentration ◽  
Sandy Loam ◽  
Growing Season ◽  
Soil Nitrate ◽  
Nitrogen Rate ◽  
Nitrate Concentrations ◽  
Loam Soil ◽  
Rain Fall

The influence of nitrogen source (commercial vs two slow-release sources), nitrogen rate at planting (56 vs 112 kg/ha) and nitrogen sidedress at early bloom (0, 56 lb N) on potato yield and soil nitrate concentrations was examined in a 3 year field study on a Bojac sandy loam soil. In each year significantly lower yields were recorded for one of the slow-release forms of N, but not the same source each year. Increased N applied at planting increased yield in 1992 and 1993, while sidedress N increased yield only in 1992. Soil nitrate concentrations in 1991 were substantially higher throughout the growing season than in 1992, particularly in the O-23 cm (surface) layer. Sidedressed nitrogen significantly increased soil nitrate concentration at 0-23, 23-46, and 46-99 cm depths, with the greatest increases recorded in 1991. The rain-fall during the growing season in 1991 was 23.5 cm, while in 1992 and 1993 rainfall was 38 and 31 cm, respectively. This study suggests that late N applications can contribute to nitrate movement through the soil profile without consistently improving tuber yield.

scholarly journals Nitrate-Nitrogen Concentrations in the Soil Profiles Beneath Containerized Rhododendron Provided High or Low Irrigation Volumes

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 799B-799
Author(s):  
David J. Colangelo ◽  
Mark H. Brand
Keyword(s):  
Nitrate Nitrogen ◽  
Sandy Loam ◽  
Irrigation Treatment ◽  
Soil Profiles ◽  
Plant Canopy ◽  
Time Period ◽  
Nitrogen Concentrations ◽  
Loam Soil ◽  
Plastic Containers ◽  
High Treatment

Uniform Rhododendron `Roseum Elegans' plants were potted into 3-gal plastic containers and place atop eight identical 1-m3 soil-filled boxes (six per box). The bottomless boxes were recessed into a grassed field and filled with Woodbridge fine sandy loam. Soil samples were taken in 30-cm layers to 90 cm from each box and analyzed for NO3-N. Samples were taken at 14-day intervals from 9 June 1994 to 10 Nov. 1994. All plants received 40 g of Sierrablen 17N–6P–10K 8–9 month controlled-release fertilizer as a topdressing on 13 June 1994. Half of the boxes received a high irrigation rate of 5 gal/min for 4 min and half received a low rate of 5 gal/min for 1 min. Irrigation was provided every other day from above the plant canopy to simulate typical irrigation practices. For the low irrigation treatment, NO3-N levels reached 19.5 mg of NO3-N/kg of soil in the first 28 days of the study, while increases in the deeper layers lagged behind. For the high treatment, NO3-N levels followed a similar pattern, but only reached 8.9 mg of NO3-N/kg of soil in the same time period. These results suggest that the high irrigation volumes cause NO3-N to leach at a faster rate, posing a threat to water resources.

scholarly journals Evaluation of Root Water Uptake and Urea Fertigation Distribution under Subsurface Drip Irrigation

Water ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1487 ◽  
Author(s):  
Mohamed Galal Eltarabily ◽  
Khaled M. Bali ◽  
Abdelazim M. Negm ◽  
Chihiro Yoshimura
Keyword(s):  
Drip Irrigation ◽  
Nitrate Concentration ◽  
Sandy Loam ◽  
Irrigation Event ◽  
Subsurface Drip Irrigation ◽  
Soil Types ◽  
Silty Loam ◽  
Loam Soil ◽  
Subsurface Drip ◽  
Emitter Discharge

Shallow groundwater contamination by nitrate is frequent in agricultural lands in Egypt because of the use of urea fertilizers. The urea transformation process in the vadose zone was simulated using a HYDRUS-2D model, Software package for simulations of 2D movement of water, heat, and multiple solutes in variably saturated media, for subsurface drip irrigation. The root water and nutrient uptake were assessed for three soil types (sandy loam, loam, and silty loam) with three emitter discharge levels (1.0 L h−1, 1.50 L h−1, and 2.0 L h−1), for a comparison of three fertigation strategies (A) at the beginning, (B) at the end, and (C) at the middle of the irrigation cycle. The extension of the wetted area mainly depends on soil hydraulic conductivity. The high emitter discharge with a short irrigation time is suitable for shallow-rooted crops. The cumulative flux was highest for silty loam soil and the lowest was for the sandy loam soil (1891, and 1824 cm3) for the 2 L h−1 emitter discharge within the 35 days simulation. The cumulative drainage significantly differs among soil types with little effect of emitter discharge. It recorded 1213, 295, 11.9 cm3 for sandy loam, loam, silty loam, respectively. Urea transformation is controlled by hydrolysis and nitrification as well as the adsorption coefficient of ammonium. Nitrate distribution is mainly governed by soil type rather than the emitter discharge where the sandy loam soil is more highly susceptible to nitrate leaching than to silty loam. Nitrate concentration has recorded the minimum possible level when applying the urea fertilizer at the beginning of the irrigation event for sandy loam and loam soil while for the silty loam soil, urea application at the middle of the irrigation event is more effective. Urea application at the end of the irrigation event gives the highest accumulated leached nitrate concentration below the root zone and should be avoided (the worst strategy).

scholarly journals Nitrogen, Magnesium, and Boron Applications Affect Cauliflower Yield, Curd Mass, and Hollow Stem Disorder

HortScience ◽  
1997 ◽  
Vol 32 (1) ◽  
pp. 75-78 ◽  
Author(s):  
K.M. Batal ◽  
D.M. Granberry ◽  
B.G. Mullinix
Keyword(s):  
Brassica Oleracea ◽  
Sandy Loam ◽  
Sandy Loam Soil ◽  
Soil Types ◽  
Yield Response ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Loam Soil ◽  
Effect On Yield ◽  
N Rates

The effects of three rates of N, Mg, and B on cauliflower (Brassica oleracea, Botrytis group) yield, average curd mass, and hollow stem disorder were evaluated on sandy and clay loam soils. Cultivars White Empress and Stovepipe were tested on the sandy loam soil and `White Empress' was tested on the clay loam soil. Maximum mean curd mass and maximum yields were obtained with the highest N rates (269 and 381 kg·ha-1) applied to sandy loam and clay loam soils, respectively. Yield response to increased N rates varied with cultivar. Increasing Mg from 22.5 to 90 kg·ha-1 did not affect yield or curd mass on clay loam soil, but increased yield and mean curd mass on sandy loam soil. The Mg effect on curd mass was influenced by N and B rates. On both soil types, the higher Mg and B rates reduced the incidence of hollow stem, but the Mg effect was influenced by N applications. On clay loam soil, increasing B from 2.2 to 8.8 kg·ha-1 reduced hollow stem but had no effect on yield or curd mass. On sandy loam soil, B at 4.4 kg·ha-1 maximized yield and curd mass, but the hollow stem disorder continued to decrease as B rates were increased from 2.2 to 8.8 kg·ha-1.

Emissions of nitrous oxide and nitric oxide associated with the decomposition of arable crop residues on a sandy loam soil in Eastern England

Agronomie ◽  
2002 ◽  
Vol 22 (7-8) ◽  
pp. 731-738 ◽  
Author(s):  
Roland Harrison ◽  
Sharon Ellis ◽  
Roy Cross ◽  
James Harrison Hodgson
Keyword(s):  
Nitric Oxide ◽  
Nitrous Oxide ◽  
Crop Residues ◽  
Sandy Loam ◽  
Sandy Loam Soil ◽  
Arable Crop ◽  
Loam Soil

Effect of Bio and Organic Fertilizers on Pumpkin's (Cucurbita pepo L.) Leave Content of N, P, and K

2020 ◽  
Vol 10 (1) ◽  
pp. 241-245
Author(s):  
Ammar Hameed Madi ◽  
Jawad A. Kamal Al-Shibani
Keyword(s):  
Cucurbita Pepo ◽  
Sandy Loam ◽  
Block Design ◽  
Organic Fertilizers ◽  
Flowering Stage ◽  
College Of Agriculture ◽  
Significant Difference ◽  
Randomized Complete Block Design ◽  
Loam Soil ◽  
Four Levels

This study was conducted to investigate the effect of bacterial bio-fertilization A. chroococcum and P. putide and four levels of compost (0, 1, 2, 3) tons.h-1 on the leaves content of N.P.K elements. The experiment was carried out in one of the greenhouses of the College of Agriculture - University of Al-Qadisiyah during fall season 2018-2019. It designed in accordance with the Randomized Complete Block Design (RCBD) with three replicates in sandy loam soil. The means of treatments were compared with the least significant difference (LSD) at (5)% probability level. The results present that the treatments of A. chroococcum, P. putide and compost at (3) tons.kg-1 significantly increases the leaves content of K.P.K compared to all other treatments in the flowering stage (4.970, 0.5000, and 4.930) mg.kg-1, respectively. This treatment was followed by the effect of the treatment of A. chroococcum and compost at (3) tons.kg-1, which increases the values of all traits except the leaf content of (P). Bio-fertilizer with P. putide + A. chroococcum significantly increases the leaves' content of P.

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