Results 81 to 90 of about 2,357 (208)

Ácido ascórbico como agente redutor para determinação de fósforo por colorimetria

Ciência Rural, 2014
Em muitos laboratórios de análises de solos, o ácido 1-Amino-2-naftol-4-sulfônico (ANS) é usado como agente redutor para determinação do P por espectrometria de UV/Visível.
Lenio da Silva Santos, Leandro Souza da Silva, Gustavo Griebeler   +2 more
doaj   +1 more source

P-chromophore stability of Mehlich-1 and Mehlich-3 under Braga & Defelipo or Murphy & Riley dosing methods

Revista Brasileira de Ciência do Solo
ABSTRACT The performance of colorimetric methods for P quantification has been overlooked by researchers for decades. We investigated the performance of two blue colorimetric methods for P quantification, Braga and Defelipo (B&D) and Murphy and Riley (M&R), using two commonly soil P extractants, Mehlich-1 (M1) and Mehlich-3 (M3).
Denison Queiroz Pogorzelski, Wedisson Oliveira Santos, Gabriel Grossi Pimentel, Fabiane Carvalho Ballotin, Patricia Cardoso Matias, Leonardus Vergütz   +5 more
openaire   +3 more sources

Corn response to broiler litter total cleanout frequency

Agrosystems, Geosciences &Environment, Volume 9, Issue 2, June 2026.
Abstract Broiler (Gallus gallus domesticus) litter is a valuable nutrient source for corn (Zea mays L.) production in the southeastern United States; however, differences in total cleanout frequency of broiler houses may influence the agronomic value of broiler litter. A 3‐year field study was established on Decatur silt loam and Malbis sandy clay loam
Rajveer Singh, Rishi Prasad
wiley   +1 more source

DISPONIBILIDADE DE FÓSFORO DE FOSFATOS NATURAIS EM SOLOS DE CERRADO E SUA AVALIAÇÃO POR EXTRATORES QUÍMICOS AVAILABILITY OF PHOSPHORUS FROM NATURAL PHOSPATES ON SAVANNAH SOILS AND ITS EVALUATION BY CHEMICAL EXTRACTANTS

Pesquisa Agropecuária Tropical, 2007
<!-- @page { margin: 2cm } --> <p class="western" align="justify">Conduziu-se um experimento em casa de vegetação com solos de cinco locais da região dos cerrados: Latossolo Vermelho Amarelo Distrófico (LVAd), Argissolo Vermelho Amarelo ...
Huberto José Kliemann, Elihu de Almeida Santos   +1 more
doaj   +1 more source

Cover crops and nitrogen rates: Impacts on no‐till corn and soil health in Louisiana

Agrosystems, Geosciences &Environment, Volume 9, Issue 2, June 2026.
Abstract Use of cover cropping systems to improve soil health is still limited in Louisiana. This study aimed to examine the interaction between cover crops and nitrogen (N) fertilizer rates on crop yield, soil chemical, and biological properties. Winter cover crop treatments, including legumes, a grass and brassica, and a fallow control, were combined
Kritsanee Iamjud, Lisa M. Fultz, Kathleen Bridges   +2 more
wiley   +1 more source

Extração simultânea de alumínio, cálcio, magnésio, potássio e sódio do solo com solução de cloreto de amônio Simultaneous extraction of aluminum, calcium, magnesium, potassium, and sodium with ammonium chloride solution

Revista Brasileira de Ciência do Solo, 2004
Atualmente, alguns laboratórios de análise de solo determinam Al, Ca e Mg trocáveis em extratos de KCl 1 mol L-1 e K e Na na solução extratora Mehlich-1, também usada na extração de fósforo.
R. C. Boeira, B. van Raij, A. S. Silva, V. C. B. Maximiliano   +3 more
doaj   +1 more source

Changes in soil test phosphorus are not predictable using fertilizer input and crop removal

Agrosystems, Geosciences &Environment, Volume 9, Issue 2, June 2026.
Abstract Volatile fertilizer prices have led to many producers and researchers exploring different immobile nutrient stratagems to increase the efficiency of fertilizer applications, leading to greater economic return. While many nutrient recommendations are based upon a soil test for that one season, for immobile nutrients such as phosphorus (P ...
Vaughn Reed, Bronc Finch, Raedan Sharry, Amee Ausec, Michaela Smith, Brian Arnall, Joao Luis Bigatao Souza, Patrick Watkins   +7 more
wiley   +1 more source

W229-Interpreting Mehlich 1 and 3 Soil Test Extractant Results for P and K in Tennessee

, 2009
The Mehlich 1 and 3 soil test extractants are the most widely used in laboratories of the southern United States today. Tennessee began using the Mehlich 1 extractant in December, 1981.
The University of Tennessee Agricultural Extension Service
core   +1 more source

Phosphorus Extraction From Soil Constituents in Equilibrium and Kinetics Applying Bray P-1, Mehlich-1, and Olsen Solutions [PDF]

, 2017
Phosphorus (P) which is an essential macro nutrient is one of the most limiting factors for plant growth in humid tropical soils. There are several methods have been applied to estimate the quantity of available  P  in soil constituents in ...
mulyani, S. (sri), Sarno, S. (Sarno), Utomo, M. (Muhajir), Lumbanraja, J. (Jamalam)   +3 more
core  

Soil properties and pH of the extractors influence extraction and availability P in alkaline soils from the São Francisco Valley, Brazil

Revista Brasileira de Ciência do Solo
Phosphorus (P) is one of the most used nutrients in agriculture due to its high degree of interaction with the soil. It is susceptible to calcium precipitation in poorly weathered and alkaline soils, such as those in the Brazilian Semi-Arid region ...
Patryk Ramon Graciano Rosa Wandersee, Maria Betânia Galvão dos Santos Freire, Fernando José Freire, Suellen Roberta Vasconcelos da Silva, Jailson Cavalcanti Cunha   +4 more
doaj   +1 more source