Soil-Test Phosphorus and Crop Grain Yield Responses to Long-Term Phosphorus Fertilization for Corn-Soybean Rotations

The effects of N, P, K, and manure factorially applied to potato (Solanum tuberosum L.) yields, starch content, and soil and tissue nutrient levels were evaluated on continuous plots over 12 yr in a 4-yr potato, grain, hay, hay rotation. Although yield responses were observed with N, P, and K applications, manure application substantially increased yields above yield levels due to applied N, P, and K. Increasing rates of KCl strongly depressed tuber starch contents. Soil test P and K levels increased with repeated fertility applications, and leaf tissue levels were increased with N, P, and K treatments.

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Soil Test Phosphorus and Phosphorus Availability of Swine Manures with Long-Term Application

Agronomy Journal ◽

10.2134/agronj2017.07.0412 ◽

2018 ◽

Vol 110 (5) ◽

pp. 1943-1950

Author(s):

Xianjun J. Hao ◽

T.Q. Zhang ◽

Y.T. Wang ◽

C.S. Tan ◽

Z.M. Qi ◽

...

Keyword(s):

Phosphorus Availability ◽

Soil Test ◽

Soil Test Phosphorus

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Finnish trends in phosphorus balances and soil test phosphorus

Agricultural and Food Science ◽

10.2137/145960607784125339 ◽

2008 ◽

Vol 16 (4) ◽

pp. 301 ◽

Cited By ~ 18

Author(s):

R. UUSITALO ◽

E. TURTOLA ◽

J. GRÖNROOS

Keyword(s):

Agricultural Soils ◽

Animal Production ◽

Plant Production ◽

Major Influence ◽

Soil Test ◽

P Loss ◽

P Concentration ◽

Soil Test P ◽

Soil Test Phosphorus ◽

Yield Responses

Soil test phosphorus (P) concentration has a major influence on the dissolved P concentration in runoff from agricultural soils. Thus, trends in soil test P partly determine the development of pollution potential of agricultural activities. We reviewed the changes of soil test P and P balances in Finnish agriculture, and assessed the current setting of P loss potential after two Agri-Environmental Programs. Phosphorus balance of the Finnish agriculture has decreased from +35 kg ha1 of the 1980s to about +8 kg P ha1 today. As a consequence, the 50-yr upward trend in soil test P concentrations has probably levelled out in the late 1990s, as suggested by sampling of about 1600 fields and by a modelling exercise. For the majority of our agricultural soils, soil test P concentrations are currently at a level at which annual P fertilization is unlikely to give measurable yield responses. Soils that benefit from annual P applications are more often found in farms specialized in cereal production, whereas farms specialized in non-cereal plant production and animal production have higher soil test P concentrations. An imbalance in P cycling between plant (feed) and animal production is obvious, and regional imbalances are a result of concentration of animal farms in some parts of the country. A major concern in future will be the fate of manure P in those regions where animal production intensity is further increasing.;

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Effect of Soil‐Test Phosphorus and Phosphorus Fertilization on the Severity of Soybean Sudden Death Syndrome

cftm ◽

10.2134/cftm2015.0193 ◽

2016 ◽

Vol 2 (1) ◽

pp. 1-4 ◽

Cited By ~ 2

Author(s):

Eric Adee ◽

Dorivar A. Ruiz Diaz ◽

Christopher R. Little

Keyword(s):

Sudden Death ◽

Sudden Death Syndrome ◽

Phosphorus Fertilization ◽

Soil Test ◽

Soil Test Phosphorus

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Field-scale variability of soil test phosphorus and other nutrients in grasslands under long-term agricultural managements

Soil Research ◽

10.1071/sr13027 ◽

2013 ◽

Vol 51 (6) ◽

pp. 503 ◽

Cited By ~ 10

Author(s):

Weijun Fu ◽

Keli Zhao ◽

Peikun Jiang ◽

Zhengqian Ye ◽

Hubert Tunney ◽

...

Keyword(s):

Soil Nutrients ◽

Poultry Litter ◽

Soil Nutrient ◽

Statistical Correlation ◽

Soil Test ◽

Field Scale ◽

The North ◽

Positive Correlations ◽

Soil Test Phosphorus

Field-scale variation of soil nutrients in grassland is becoming important because of the use of soil-nutrient information as a basis for policies such as the recently introduced EU Nitrates Directive. This study investigates the field-scale variability of soil-test phosphorus (STP) and other nutrients in two grasslands with a long-term history of poultry litter application. Two fields (field 1 for silage and field 2 for grazing pasture) were selected, and soil samples were collected based on 12 m by 12 m (field 1) and 15 m by 15 m (field 2) grids. Data were analysed using conventional statistics, geostatistics, and a geographic information system (GIS). In field 1, STP values ranged from 12.4 to 90 mg L–1 (average 38.5 mg L–1). In field 2, STP values ranged from 4.3 to 130.0 mg L–1 (average 21.4 mg L–1). Attention should be paid to long-term poultry application, as the average STP values in both fields were much greater than the recommended agronomic optimum STP status in Ireland of 8 mg L–1. Coefficient of variation values of soil nutrients in field 2 were much higher than those in field 1. Log-transformation and Box–Cox transformation were applied to achieve normality. Statistically significant (P < 0.01), positive correlations between P and other nutrients were found in both fields. Exponential and spherical models were fitted to the experimental variograms of STP in fields 1 and 2, respectively. Compared with the counterparts in field 1, soil nutrients in field 2 had larger ‘nugget-to-sill’ values, revealing that sheep grazing could weaken the spatial auto-correlation of soil nutrients. A grid of 60 m by 60 m was recommended for soil sampling in grassland, based on this study. High STP concentrations in field 1 were in the north-eastern side, which was related to uneven poultry litter application. Strong spatial similarity of low STP, magnesium, and pH values in their spatial distribution were found in field 2, confirming their strong statistical correlation.

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