scholarly journals Celery Yield Responds to Phosphorus Rate But Not Phosphorus Placement on Histosols

HortScience ◽  
1993 ◽  
Vol 28 (12) ◽  
pp. 1168-1170 ◽  
Author(s):  
L. Espinoza ◽  
C.A. Sanchez ◽  
T.J. Schueneman
Keyword(s):  
Field Experiments ◽  
Soil Surface ◽  
Apium Graveolens ◽  
Soil Test ◽  
Band Placement ◽  
Fertilizer Use Efficiency ◽  
Fertilizer Use ◽  
Fertilizer Recommendations ◽  
P Fertilizer ◽  
Use Efficiency

Four field experiments were conducted during two production seasons to evaluate soil-test P fertilizer recommendations for celery (Apium graveolens var. dulce) produced on Histosols, which often are linked hydrologically to environmentally sensitive wetlands, and to evaluate band placement as a strategy for improving P fertilizer-use efficiency in celery in such areas. Phosphorus was applied (broadcast or banded) at 0,50, 100,150, and 200 kg P/ha. Broadcast P was surface-applied and disked into the soil ≈ 15 cm deep 1 day before planting. Banded P was applied 5 cm below the soil surface and 5 cm to the side of each celery row. Total above-ground mass, marketable trimmed yield of celery, and yield of the larger grade sizes increased with P rate in all experiments. Band P placement was not a viable strategy for improving P fertilizer-use efficiency for celery. However, our results indicate that previous soil-test-based P fertilizer recommendations for celery were too high for the cultivars grown currently, and improved P fertilizer-use efficiency can be obtained with revised soil-test calibrations.

scholarly journals Effect of Phosphorous Application on Uptake, Yield and Fertilizer Use Efficiency under Rice-Rice and Rice-Sunflower Systems in High P Soils

Agropedology ◽  
2019 ◽  
Vol 26 (2) ◽  
Author(s):  
A. Srinivas ◽  
◽  
P. Surendra Babu ◽  
A. Madhavi ◽  
G.E.C.H. Vidyasagar ◽  
...  
Keyword(s):  
Field Experiments ◽  
Cropping Systems ◽  
Sunflower Seeds ◽  
Fertilizer Use Efficiency ◽  
Fertilizer Use ◽  
Fertilizer Requirement ◽  
P Fertilizer ◽  
P Utilization ◽  
Use Efficiency ◽  
P Removal

Field experiments on P accumulated soils were conducted during 2009-10 and 2010-11 to assess (i) P fertilizer requirement and (ii) P fertilizer use efficiency using 32P isotope in rice–rice and rice–sunflower (rabi) systems. Four treatments in kharif (T1: 100%, T2: 75%, T3: 50% and T4: 25%) recommended dose of phosphorus (RDP) and three treatments in rabi (T1: 100%, T2: 75%, T3: 50% RDP) were tested. A uniform dose of 100% recommended 48 kg ha-1 of N and 24 kg ha-1 of K were applied along with P treatments. The P removal by both grain and straw by both crops under rice-rice system was at par with 100 and 75% RDP. The percent P utilization in entire system revealed that 75% RDP gave better utilization of applied P to a tune of 26% compared to 22% realized by 100% RDP in each crop. Similar trend of P removal by rice and sunflower seeds in rice-sunflower system was observed. Percent P utilization in both crops was 24.5% under 100% RDP and 27.2% under 75% RDP. The study clearly indicated 25% reduction in P fertilization for both cropping systems in high P soils.

scholarly journals 651 PB 025 FERTILIZER BANDING REDUCES P INPUTS INTO COMMERCIAL LETTUCE PRODUCTION ON HISTOSOLS

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 526a-526
Author(s):  
N. M. El-Hout
Keyword(s):  
Field Experiments ◽  
Soil Test ◽  
Band Placement ◽  
Pooled Data ◽  
P Fertilizer ◽  
P Rate ◽  
Soil Test P ◽  
Large Production ◽  
Use Efficiency ◽  
Environmentally Sensitive

Band placement has been recognized as an effective strategy for improving P fertilizer-use efficiency on Histosols, which are often characterized as environmentally sensitive wetlands, and for reducing P loading of drainage waters from these soils. Recent studies indicate that crisphead lettuce (Lacruca sativa L.) yields can be optimized with a band-P rate one-third of that required with broadcast applications. However, such findings have not been verified in large production plots. Five field experiments were conducted between 1991 and 1993 to evaluate the response of crisphead lettuce produced commercially on Histosols to band P rates. Liquid P fertilizers were placed in lo-cm-wide strips, 8.5-cm below the seed at planting in rates ranging from 0 to 224 kg P ha-1. Lettuce yields increased significantly with P rate in all experiments. Irrespective of initial soil-test-P index, lettuce yields within each experiment were maximized with a band rate 54% of that required in a broadcast. The pooled data for all experiments showed a similar trend. These findings provided a means of making alternative band fertilizer recommendations by utilizing an existing preplant broadcast soil test.

scholarly journals Long-term straw incorporation benefits the elevation of soil phosphorus availability and use efficiency in the agroecosystem

2018 ◽  
Vol 16 (3) ◽  
pp. e1101 ◽  
Author(s):  
Zhibin Guo ◽  
Hui Liu ◽  
Keke Hua ◽  
Daozhong Wang ◽  
Chuanlong He
Keyword(s):  
Organic Matter ◽  
Wheat Straw ◽  
Soil Ph ◽  
Mineral Fertilization ◽  
Fertilizer Use Efficiency ◽  
Fertilizer Use ◽  
P Fertilizer ◽  
Use Efficiency ◽  
Straw Incorporation

Soil pH and organic matter are important factors influencing phosphorus (P) fertilizer use efficiency. Long-term crop straw incorporation alters soil pH and soil organic matter. To explore the influence of crop straw incorporation on P fertilizer use efficiency, this research was conducted in a long-term field experiment (30 years) with a wheat-soybean cropping system and selected four treatments: no fertilization, mineral fertilization (NPK), mineral fertilization + 3750 kg/ha wheat straw (WS/2-NPK) and mineral fertilization + 7500 kg/ha wheat straw (WS-NPK). Results show that long-term straw incorporation not only accentuates soil acidification, but also elevates crop yields and soil P availability. Consequently, compared with the NPK treatment, straw incorporation contributed to higher P fertilizer use efficiency, which increased from 43% in 1983 to 72% in 2012 for WS/2-NPK, from 46% to 69% for WS-NPK, and from 34% to 60% for NPK treatments, respectively. Moreover, the P fertilizer use efficiency in all fertilization treatments could be categorized as follows: slowly increasing stage in 1982-2002, stable stage in 2003-2006, and rapidly increasing stage in 2007-2012. Correspondingly, the annual P balances of the WS/2-NPK and WS-NPK treatments ranged from positive to negative in the 1982-2003 and 2004-2012. Therefore, compared with mineral fertilization alone, long-term wheat straw incorporation has the associated benefit of elevating the P fertilizer use efficiency. However, to maintain sustainable high crop productivity, it is necessary to elevate the dose of P fertilizer input and reduce the soil acidification under wheat straw incorporation.

Yield and N uptake of barley on two artificially eroded soils in north-central Alberta

1997 ◽  
Vol 77 (2) ◽  
pp. 317-322
Author(s):  
R. Pradhan ◽  
R. C. Izaurralde ◽  
M. Nyborg ◽  
S. S. Malhi
Keyword(s):  
Dry Matter ◽  
Field Experiments ◽  
N Uptake ◽  
Potassium Nitrate ◽  
Hordeum Vulgare L ◽  
North Central ◽  
Fertilizer Use Efficiency ◽  
Fertilizer Use ◽  
Use Efficiency ◽  
Topsoil Removal

Topsoil depth is an indirect indicator of soil quality and crop productivity. A 2-yr field study was conducted in north-central Alberta with the following objectives: (1) to determine aboveground barley dry matter yield, N uptake, and fertilizer-use efficiency (FUE) in two artificially eroded soils of contrasting properties, and (2) to assess the effectiveness of KNO3 and urea in compensating for lost productivity. Field experiments were conducted on an Orthic Gray Luvisol (Site 1) and on an Eluviated Black Chernozem (Site 2) in 1991 and 1992. The treatments consisted of three depths of topsoil removal (0, 10 and 20 cm) and three N fertilizers (KNO3 and urea at 150 kg N ha−1, and the control). The plots were sown to barley (Hordeum vulgare L.). Yields and N uptake of aboveground barley dry matter decreased with each increment of topsoil removal and were lowest in the 20-cm topsoil removal. Fertilizer N improved yields and N uptake at each depth of erosion. In most of the erosion treatments barley yields and N uptake tended to be greater with KNO3 than with urea. The effectiveness of each N source, however, varied with site. At the 20-cm depth of erosion, KNO3 was more effective than urea. The trend in fertilizer-use efficiency increased with depth of erosion at Site 1 but decreased at Site 2. Key words: Artificial erosion, barley, fertilizer-use efficiency, potassium nitrate, urea

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