Excessive phosphorus (P) loss from soils impairs surface water resources. An assessment tool or index has been proposed to identify fields with high potential risk of P delivery. The P index integrates P source and transport factors into a decision making process that may lead to changes in current P management and soil conservation practices. The index recognizes that a single soil P threshold...

BACKGROUND AND AIMS Soil phosphorus (P) solubility declines sharply when a flooded soil drains, and an important component of rice (Oryza sativa) adaptation to rainfed lowland environments is the ability to absorb and utilize P under such conditions. The aim of this study was to test the hypothesis that rice cultivars differ in their P responses between water regimes because P uptake mechanisms...

*Correspondence: Vimala D. Nair, Soil and Water Science Department, University of Florida, PO Box 110290, 2181 McCarty Hall A, Gainesville, FL 32611, USA e-mail: [email protected] The risk of phosphorus loss from agricultural soils can have serious implications for water quality. This problem has been noted particularly in sandy soils in several parts of the world including Europe (e.g., the Netherla...

Phosphorus (P) constraint can be alleviated by increasing C inputs, which help to improve crop production and P fertilizer use efficiency. However, the effects of different manures on soil microbial biomass (MBP) fractions as well in calcareous soils remain poorly understood. Soil MBP pool involves mineralization immobilization processes, potentially changing availability. Therefore, (MBP, MBC)...

Soil microorganisms directly participate in phosphorus (P) cycle, which turn affects crop yield and quality. However, how biological chemical parameters respond to mineral P fertilizer application rates rhizosphere soil remains unclear. Here, a pot experiment was conducted investigate the effects of different (0, 60, 120, 300 kg P2O5 ha−1) on properties bacterial community maize Mollisol. With ...

The application of manure (M) and straw (S) will increase the Olsen P phosphorus activation coefficient (PAC) in soil. Clarifying increasing trend PAC is crucial for rational fertilization. This study fitted equation between accumulated surplus, P, four treatments 28 years analyzed changes rates fractions. results showed linearly with NPK NPKS treatments; every 100 kg ha−1 increased by 5.9 6.7 ...

Abstract Background The soil P leaching change point (CP) has been widely used to evaluate risk. However, an automation calculation method for CP value, and effective risk grading performed classifying evaluation have not developed. Results This study optimized the process value with two different fitting models. Subsequently, based on Python programming language, a computation tool named Soil ...

The effect of Indigenous microorganisms (IMO’s) on the native soil was investigated in the present study. Supplementation of IMO’s suspension to the soil alters the physico-chemical, biological and enzyme properties of the soil. These alternations include decreases in P from 7.2 to 6.8, increase in electrical conductivity 0.36 to 1.21 (μmohs/cm), water holding capacity 0.36 to 2.2ml/g of soil o...

Many of the world's northern peatlands are underlain by rapidly thawing permafrost. Because plant production in these peatlands is often nitrogen (N)-limited, a release of N stored in permafrost may stimulate net primary production or change species composition if it is plant-available. In this study, we aimed to quantify plant-available N in thawing permafrost soils of subarctic peatlands. We ...

nas incognita have been previously described as being able to utilize citronellol, geraniol, and linalool (3, 6). Recently, a 50-megadalton (MDa) plasmid has been associated with the degradation of geraniol (9). In this report we describe the isolation of a Pseudomonas fluorescens s train capable of utilizing linalool as a sole carbon and energy source and demonstrate the presence of a transmis...