The residual effectiveness of phosphorus for stylosanthes pastures on red and yellow earths in the semi-arid tropics

Soil Research ◽  
1985 ◽  
Vol 23 (2) ◽  
pp. 211 ◽  
Author(s):  
ME Probert ◽  
J Williams
Keyword(s):  
Soil Phosphorus ◽  
Fertilizer Application ◽  
Yield Data ◽  
Stylosanthes Hamata ◽  
Phosphorus Requirements ◽  
Term Maintenance ◽  
Semi Arid ◽  
Residual Effectiveness ◽  
Extractable Soil

A mathematical description is presented of the effects through time of phosphorus fertilizer application on the growth of Stylosanthes hamata cv. Verano and on changes in extractable soil phosphorus on a red and a yellow earth in the semi-arid tropics. For the five years of observations, the models used provided reasonable descriptions of both aspects. It was not possible, however, to clearly demonstrate which of two functions tested better described the decreasing effectiveness of phosphorus with time. The simpler exponential function provided as good a fit to the yield data as did the function proposed by Barrow, whilst for the extractable phosphorus data the latter did explain a significantly higher proportion of the variance, but its coefficients could not be estimated with great precision. The results show that the phosphorus requirements of such pastures on these soils are modest. Extractable soil phosporus levels of approximately 12 �g g-1 in either 0.005 M H2SO4 or 0.5 M NaHCO3 are indicated as being adequate to ensure near-maximum yields of the legume. Long-term maintenance fertilizer needs as predicted by the models are discussed.

Effect of long-term fertilizer application on C-sequestration and sustainable yields of finger millet and groundnut grown under rotation in semi-arid Alfisols

2018 ◽  
Vol 49 (16) ◽  
pp. 2074-2090
Author(s):  
A. Sathish ◽  
G.R. Maruthi Sankar ◽  
B.K. Ramachandrappa ◽  
H.K. Ashoka
Keyword(s):  
Finger Millet ◽  
C Sequestration ◽  
Fertilizer Application ◽  
Semi Arid

Effects of Long-Term Compost and Fertilizer Application on Soil Phosphorus Status Under Paddy Cropping System

2004 ◽  
Vol 35 (11-12) ◽  
pp. 1635-1644 ◽  
Author(s):  
Myungsu Park ◽  
Olayvanh Singvilay ◽  
Wansik Shin ◽  
Eunhee Kim ◽  
Jongbae Chung ◽  
...  
Keyword(s):  
Soil Phosphorus ◽  
Cropping System ◽  
Fertilizer Application ◽  
Phosphorus Status

Effects of Long-Term Fertilizer Application and Rainfall Distribution on Cotton Productivity, Profitability, and Soil Fertility in a Semi-arid Vertisol

2014 ◽  
Vol 45 (3) ◽  
pp. 362-380 ◽  
Author(s):  
G. R. Maruthi Sankar ◽  
K. L. Sharma ◽  
V. V. Gabhane ◽  
M. B. Nagdeve ◽  
M. Osman ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Fertilizer Application ◽  
Rainfall Distribution ◽  
Semi Arid

Long-term Changes in Grassland Soil Phosphorus with Fertilizer Application and Withdrawal

2017 ◽  
Vol 46 (3) ◽  
pp. 537-545 ◽  
Author(s):  
Barbara J. Cade-Menun ◽  
Donnacha G. Doody ◽  
Corey W. Liu ◽  
Catherine J. Watson
Keyword(s):  
Soil Phosphorus ◽  
Fertilizer Application ◽  
Grassland Soil ◽  
Long Term Changes

Long-term crop rotation and fertilizer effects on phosphorus transformations: II. In a Luvisolic soil

1992 ◽  
Vol 72 (4) ◽  
pp. 581-589 ◽  
Author(s):  
R. H. McKenzie ◽  
J. W. B. Stewart ◽  
J. F. Dormaar ◽  
G. B. Schaalje
Keyword(s):  
Sodium Bicarbonate ◽  
Sequential Extraction ◽  
Sodium Hydroxide ◽  
Crop Rotation ◽  
Soil Phosphorus ◽  
Fertilizer Application ◽  
P Fractions ◽  
Soil P ◽  
P Transformations

The effects of different cropping systems, fertilizer, and lime on soil phosphorus (P) dynamics in soils developed under forest vegetation have received little attention. The objective of this study was to develop an understanding of P fractions and transformations in long-term rotation plots on a Luvisolic soil at Breton, Alberta. Results have shown that crop rotation and fertilizer application have affected more inorganic soil phosphorus (Pi) and organic phosphorus (Po) fractions, as determined by a sequential extraction procedure. Continuously cropped treatments, which had not received fertilizer, resulted in P drawdown of resin-extractable Pi (resin-Pi), sodium bicarbonate-extractable Pi (bicarb-Pi), sodium hydroxide-extractable Pi (NaOH-Pi), sodium bicarbonate-extractable Po (bicarb-Po), sodium hydroxide-extractable Po (NaOH-Po) and hydrochloric acid-extractable Pi (HCl-Pi) fractions. Only the residual-P fraction (insoluble Pi and stable Po forms) was unaffected. Addition of fertilizer had an effect on all P fractions except the NaOH-Po fraction. Phosphorus fertilizer treatments positively affected the Pi fractions and N fertilizer positively affected the bicarb-Po fraction. Lime application affected soil pH, which lowered NaOH-Pi levels and increased HCl-Pi levels through formation of more stable calcium phosphate compounds. Addition of lime also resulted in lower bicarb-Po levels. Cropping without using phosphate fertilizer has resulted in a 30–40% decline in total-P in the Breton plots in the Ap horizon. Continuous cropping, with a forage crop in the rotation, coupled with modest N and P fertilizer application, had the most positive effects on P cycling and transformations. Summerfallow had no apparent beneficial effects on P transformations. Key words: Soil P transformations, Luvisolic soil, P bioavailability, sequential extraction

Optimizing sowing density-based management decisions with different nitrogen rates on smallholder maize farms in Northern Nigeria

2020 ◽  
Vol 56 (6) ◽  
pp. 866-883
Author(s):  
Adnan Aminu Adnan ◽  
Jan Diels ◽  
Jibrin Mohammed Jibrin ◽  
Alpha Yaya Kamara ◽  
Abdulwahab Saliu Shaibu ◽  
...  
Keyword(s):  
Nutrient Management ◽  
Fertilizer Application ◽  
Growth And Yield ◽  
Planting Density ◽  
Economic Returns ◽  
Yield Data ◽  
N Fertilizers ◽  
Scenario Analyses ◽  
Maize Varieties

AbstractIn this study, the CERES-Maize model was calibrated and evaluated using data from 60 farmers’ fields across Sudan (SS) and Northern Guinea (NGS) Savannas of Nigeria in 2016 and 2017 rainy seasons. The trials consisted of 10 maize varieties sown at three different sowing densities (2.6, 5.3, and 6.6 plants m−2) across farmers’ field with contrasting agronomic and nutrient management histories. Model predictions in both years and locations were close to observed data for both calibration and evaluation exercises as evidenced by low normalized root mean square error (RMSE) (≤15%), high modified d-index (> 0.6), and high model efficiency (>0.45) values for the phenology, growth, and yield data across all varieties and agro-ecologies. In both years and locations and for both calibration and evaluation exercises, very good agreements were found between observed and model-simulated grain yields, number of days to physiological maturity, above-ground biomass, and harvest index. Two separate scenario analyses were conducted using the long-term (26 years) weather records for Bunkure (representing the SS) and Zaria (representing the NGS). The early and extra-early varieties were used in the SS while the intermediate and late varieties were used in the NGS. The result of the scenario analyses showed that early and extra-early varieties grown in the SS responds to increased sowing density up to 8.8 plants m−2 when the recommended rate of N fertilizers (90 kg N ha−1) was applied. In the NGS, yield responses were observed up to a density of 6.6 plants m−2 with the application of 120 kg N ha−1 for the intermediate and late varieties. The highest mean monetary returns to land (US$1336.1 ha−1) were simulated for scenarios with 8.8 plants m−2 and 90 kg N ha−1, while the highest return to labor (US$957.7 ha−1) was simulated for scenarios with 6.6 plants m−2 and 90 Kg N ha−1 in the SS. In the NGS, monetary return per hectare was highest with a planting density of 6.6 plants m−2 with the application of 120 kg N, while the return to labor was highest for sowing density of 5.3 plants m−2 at the same N fertilizer application rates. The results of the long-term simulations predicted increases in yield and economic returns to land and labor by increasing sowing densities in the maize belts of Nigeria without applying N fertilizers above the recommended rates.

scholarly journals Influence of long-term fertilizer application on changes of the content of Mehlich-3 estimated soil macronutrients

2014 ◽  
Vol 60 (No. 4) ◽  
pp. 151-157 ◽  
Author(s):  
M. Kulhánek ◽  
J. Balík ◽  
J. Černý ◽  
F. Vašák ◽  
Š. Shejbalová
Keyword(s):  
Sewage Sludge ◽  
Crop Rotation ◽  
Field Experiments ◽  
Soil Phosphorus ◽  
Farmyard Manure ◽  
Magnesium Content ◽  
Fertilizer Application ◽  
Climatic Conditions ◽  
Total Magnesium

The aim of this work is to evaluate the changes of Mehlich 3 – P, K, Ca and Mg contents in soil during a long-term field experiments with sewage sludge, farmyard manure (FYM) and mineral NPK (NPK) application, compared to the control non-fertilized treatment. The experiment was established at the Humpolec and Suchdol sites (Czech Republic). Potatoes, wheat and barley were grown in crop rotation. Fertilizing system was based on the same nitrogen dose of 330 kg N/ha per one crop rotation. Archive soil samples from the beginning of the experiment (1996) and from the end of each year’s crop rotation (1999, 2002, 2005, 2008 and 2011) were analyzed. In spite of the different soil-climatic conditions of the studied sites, very similar tendencies of P, K, Ca and Mg contents changes after the fertilizing systems used were observed in the soil. In case of the same nitrogen dose (330 kg N/ha), sewage sludge appeared to be better source of bioavailable soil phosphorus compared to the farmyard manure and NPK. On the contrary, FYM was a better source of bioavailable potassium and magnesium, despite the lower total magnesium content in FYM. The NPK treatment was the best long-term source of bioavailable potassium.

Agronomic application of olive mill wastewaters with phosphate rock in a semi-arid Mediterranean soil modifies the soil properties and decreases the extractable soil phosphorus

2007 ◽  
Vol 85 (4) ◽  
pp. 1088-1093 ◽  
Author(s):  
Beligh Mechri ◽  
Faouzi Attia ◽  
Mohamed Braham ◽  
Salem Ben Elhadj ◽  
Mohamed Hammami
Keyword(s):  
Soil Properties ◽  
Phosphate Rock ◽  
Soil Phosphorus ◽  
Olive Mill Wastewaters ◽  
Mediterranean Soil ◽  
Semi Arid ◽  
Extractable Soil ◽  
Olive Mill
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