Results 51 to 60 of about 29,990,436 (208)

Boron extraction and vertical mobility in Paraná State oxisol, Brazil Extração e mobilidade vertical de boro em latossolo vermelho eutroférrico no Estado do Paraná

Revista Brasileira de Ciência do Solo, 2009
The deficiency or excess of micronutrients has been determined by analyses of soil and plant tissue. In Brazil, the lack of studies that would define and standardize extraction and determination methods, as well as lack of correlation and calibration ...
Waldemar de Oliveira Neto, Antonio Saraiva Muniz, Maria Anita Gonçalves da Silva, Cesar de Castro, Clovis Manuel Borkert   +4 more
doaj   +1 more source

Effects of irrigated cover crop cultivation period on common bean and soybean yield

Crop, Forage &Turfgrass Management, Volume 12, Issue 2, December 2026.
Abstract Cover crop inclusion is essential for improving soil management in tropical no till systems; however, the optimal duration of irrigated off‐season cultivation remains uncertain. This 3‐year field study evaluated nine cover crop species or mixtures and four cultivation periods (60, 75, 90, and 105 days) on biomass production, soil chemical ...
Adriano S. Nascente, Izabely V. L. Ferreira, Rafael B. Oliveira, Dennis R. C. Cruz, Natasha O. C. Monteiro, Victorya G. M. Souza, Edmilson J. M. Caetano, Aline C. M. Façanha, Evandro I. Costa   +8 more
wiley   +1 more source

Avaliação da eficiência dos extratores Mehlich-1 e Mehlich-3 em diferentes solos do Estado do Rio de Janeiro. [PDF]

, 1999
O objetivo do presente trabalho foi avaliar a disponibilidade de fósforo utilizando-se os extratores Mehlich-1 e Mehlich-3. O delineamento utilizado foi o inteiramente casualizado, com 3 repetições, num fatorial 4x4x2, empregando-se amostras superficiais
PEREIRA, M. G., PEREZ, D. V., REIS, F. de O., SILVA, M. C. P. da, OLIVEIRA, C. de   +4 more
core  

Extratores e disponibilidade de micronutrientes em Terra Preta de Índio da Amazônia Central Extractants and availability of micronutrients in Central Amazonian dark earth soil

Ciencia del Suelo, 2009
O objetivo deste trabalho foi avaliar a disponibilidade de B, Cu, Fe, Mn e Zn em solos com horizonte A antrópico (Terra Preta do Índio - TPI) da Amazônia Central com as soluções extratoras Mehlich 1 (M1), Mehlich 3 (M3) e DTPA-TEA.
Adônis Moreira, Wenceslau Geraldes Teixeira, Gilvan Coimbra Martins   +2 more
doaj  

Cauliflower Performance and Nitrogen Leaching Under Blends of Controlled Release and Conventional Urea

New Zealand Journal of Crop and Horticultural Science, Volume 54, Issue 4, December 2026.
The efficiency of nitrogen fertilization in cauliflower depends on synchronizing nutrient availability with crop demand while minimizing environmental losses. This study evaluated cauliflower performance and nitrogen leaching under varying ratios of polymer‐coated controlled‐release urea (CRU) and conventional urea (CU).
Simone C. Mello, Yuncong C. Li, André Ricardo Zeist, Jose Augusto Pereira Neto   +3 more
wiley   +1 more source

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

, 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  

Bioavailable phosphorus across Florida’s diverse soil orders: implications for crop productivity and environmental protection

Frontiers in Environmental Science
Effective phosphorus (P) management is critical for sustainable agricultural production in Florida. The state’s diverse acid-mineral soils, including Alfisols, Entisols, Spodosols, and Ultisols, exhibit distinct physiochemical properties that profoundly ...
Vimala D. Nair, Dinesh Phuyal, Lilit Vardanyan   +2 more
doaj   +1 more source

Calibração de métodos de análise de fósforo e resposta do feijão ao fósforo no sulco [PDF]

Pesquisa Agropecuária Brasileira, 2002
O feijoeiro e o milho apresentam respostas significativas ao P, mas deve-se avaliar adequadamente sua disponibilidade no solo para recomendar adubação fosfatada.
Leo Nobre de Miranda, Juscelino Antonio de Azevedo, Jeanne Christine Claessen de Miranda, Antonio Carlos Gomes   +3 more
doaj   +1 more source

Climate Shapes Elevational Gradients in Concentration, Composition, and Functional Diversity of Willow Metabolomes

Plant, Cell &Environment, Volume 49, Issue 11, Page 8851-8866, November 2026.
ABSTRACT Plants produce broad spectra of metabolites comprising primary metabolites involved in core physiological processes and specialized metabolites mediating responses to biotic and abiotic stress. Understanding how these various components of the metabolome respond to different environmental pressures can help us to understand drivers of ...
Sofian A. Renoult, Priscila Mezzomo, Jing V. Leong, Pavel Sebek, Shristee Panthee, Jaroslav Kukla, Petr Nguyen, Martin Moos, Dale L. Forrister, Natascha D. Wagner, Elvira Hörandl, Petr Koutecký, Brian E. Sedio, Jan Frouz, Nicole M. van Dam, Martin Volf   +15 more
wiley   +1 more source

Optimising Defoliation Frequency and Intensity to Enhance Forage Accumulation in Annual Ryegrass

Grass and Forage Science, Volume 81, Issue 4, October/December 2026.
ABSTRACT To increase grazing efficiency, it is necessary to understand morphogenetic responses and how they drive forage harvest. Our objective was to evaluate defoliation frequency (time between defoliations required for the expansion of 2, 3 and 4 leaves) and intensity (low: maintenance of 50% stubble height; intermediate: maintenance of 25% stubble ...
Carlos E. S. Pedroso, Ricardo B. Job, Andrea Mittelmann, Otoniel G. L. Ferreira, Denismar A. Nogueira, Bruno C. Pedreira, Carlos H. S. Rabelo   +6 more
wiley   +1 more source