Low nutrient level s in soil are a recognized limitation to crop production. Yet, farmers in
certain agro-ecoregions either do not apply fertilizers, apply inadequate amounts, or apply …

We evaluated the critical limits of P, K, S, B and Zn in Inceptisols and Alfisols for nutrition of
rice (Oryza sativa L.) using Mehlich 3 as an extractant. Three levels, each of P (0, 14 and 23 …

The extraction of trace elements from soil with DTPA is a widely used protocol across
laboratories. There is a possible “hidden” discrepancy regarding the results obtained from …

Little is known about the impact of long-term intensive irrigated rice cropping on secondary
macro and micronutrients in soils and crops. Therefore, the present study analysed the effect …

Abstract Context or Problem Soil testing for available nutrients is an important tool to
determine fertilizer rates, however many standard methods test the availability of a single …

Nutrient depletion and imbalance are among the major attributes that contribute to declining
soil productivity in the highlands of Ethiopia. The blanket fertilizer recommendation, which …

Indexing soil quality and identification of key soil indicators are essential for maintaining
sustainability of agricultural soils. A minimum data set was developed for soils collected from …

Given the increasing concern over Cd contamination of agricultural soils in China, reducing
the availability of the toxic metal has become an important remedial strategy. However, the …

We evaluated the efficiency of six complex extractants such as
diethylenetriaminepentaacetic acid (DTPA), Mehlich 3, ammonium bicarbonate–DTPA (AB …

One of the goals of sustainable agricultural production is to avoid soil contamination by
elements defined as trace metals (TMs). The aim of this study was to assess the long-term …