2007
DOI: 10.1111/j.1475-2743.2007.00124.x
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Phosphorus accumulation, leaching and residual effects on crop yields from long‐term applications in the subtropics

Abstract: The effects of 25 years of annual applications of P fertilizer on the accumulation and migration of soil Olsen‐P, and the effects of soil residual P on crop yields by withholding P application for the following 5 years, were evaluated in a subtropical region. Annual application of P fertilizer for 25 years to crops in summer (groundnut), winter (wheat, mustard or rapeseed) or in both seasons raised the Olsen‐P status of the plough layer (0–15 cm) from initially very low (12 kg P ha−1) to medium (18 kg P ha−1) … Show more

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Cited by 77 publications
(43 citation statements)
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“…This problem gets accentuated with improper P management. The P fertility data from long term fertility experiments on the other hand revealed tremendous movement of residual P to deeper layers in one subtropical coarse-textured irrigated soil pointing to the potential for extensive leaching of fertilizer P Aulakh et al (2007) where P fertilization could be reduced without jeopardizing the productivity.…”
Section: Introductionmentioning
confidence: 99%
“…This problem gets accentuated with improper P management. The P fertility data from long term fertility experiments on the other hand revealed tremendous movement of residual P to deeper layers in one subtropical coarse-textured irrigated soil pointing to the potential for extensive leaching of fertilizer P Aulakh et al (2007) where P fertilization could be reduced without jeopardizing the productivity.…”
Section: Introductionmentioning
confidence: 99%
“…Jones et al [35] pointed out that heavy metals were adsorbed at particle surface or to carbonates as well as occluded in iron or manganese oxides, organic matter or sulphide. This was corroborated by Anikwe [36]. In his findings where he noted that heavy metals were chelated by organic matter and thus reduced its presence in the soil.…”
Section: Heavy Metals Concentration In Soilmentioning
confidence: 61%
“…This build up of soil P pool can lead to increased risk of P loss from soil (Dinesh et al, 2014). The high P accumulation also results downward movement P to deeper layers in coarsetextured irrigated soil as observed by Aulakh et al, (2007), pointing to the potential for extensive leaching under long-term P fertilizer applications. More information is thus to be elicited from subtropical soils of India where P fertilizers are fully imported and applied in excess of crop requirement.…”
Section: Issn: 2319-7706 Volume 6 Number 4 (2017) Pp 1919-1930mentioning
confidence: 94%