Results 21 to 30 of about 808,916 (299)

Nitrogen and Phosphorus Balances Vary at the Whole-Farm, Field, and Within-Field Scales

Frontiers in Sustainability, 2021
A field nutrient balance (supplied minus harvested) can be an effective, end-of-season management evaluation tool. However, development of guidance for balance-based management requires knowledge of variability in balance inputs.
Jonathan M. Berlingeri, Joseph R. Lawrence, S. Sunoj, Karl J. Czymmek, Karl J. Czymmek, Quirine M. Ketterings   +5 more
doaj   +1 more source

Corn Grain Yield Prediction and Mapping from Unmanned Aerial System (UAS) Multispectral Imagery

Remote Sensing, 2021
Harvester-mounted yield monitor sensors are expensive and require calibration and data cleaning. Therefore, we evaluated six vegetation indices (VI) from unmanned aerial system (Quantix™ Mapper) imagery for corn (Zea mays L.) yield prediction.
S. Sunoj, Jason Cho, Joe Guinness, Jan van Aardt, Karl J. Czymmek, Quirine M. Ketterings   +5 more
doaj   +1 more source

Increasing the productivity of hydrolase producers by induced mutagenesis and their comparative characteristics [PDF]

BIO Web of Conferences
In order to study the increase in productivity of natural hydrolase producers B. subtilis (producer of amylolytic and proteolytic enzymes) and T. harzianum (producer of xylolytic and cellulolytic enzymes), the efficiency of various approaches to non ...
Mukhammadiev Rinat, Valiullin Lenar, Mukhammadiev Rishat, Saifullin Almaz, Tarasova Evgenya, Zaynullin Lenar, Sorokina Diana, Karimullina Ilsiyar, Nesterova Irina, Samsonov Andrey   +9 more
doaj   +1 more source

Nitrogen in the Environment: Sources, Problems, and Management

The Scientific World Journal, 2001
Nitrogen (N) is applied worldwide to produce food. It is in the atmosphere, soil, and water and is essential to all life. N for agriculture includes fertilizer, biologically fixed, manure, recycled crop residue, and soil-mineralized N.
R.F. Follett, J.L. Hatfield
doaj   +1 more source

The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada

Population Ecology, EarlyView.
We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley   +1 more source

Increasing Knowledge Of Analytical Chemistry Subjects Through Intensive Counseling On Student That Has Background IPS Prodi DIII Nutrition Poltekkes Kemenkes Semarang

LINK, 2015
Analytical chemistry subjects is a scientific subjects and skills. Analytical chemistry subjects in the extension class consisting of 44 students turned out 15 people do not pass the exam on the final test of semester 1.
Suharni Iriyanti, Soesanto Soesanto, Surati Surati   +2 more
doaj   +1 more source

Network topology drives population temporal variability in experimental habitat networks

Population Ecology, EarlyView.
Habitat patches connected by dispersal pathways form habitat networks. We explored how network topology affects population outcomes in laboratory experiments using a model species (Daphnia carinata). Central habitat nodes in complex lattice networks exhibited lower temporal variability in population sizes, suggesting they support more stable ...
Yiwen Xu, J. Angus Webb, William D. Bovill, Elise L. King   +3 more
wiley   +1 more source

Pharmacology: The Pharmacodynamics of Nutrients and Nutrient Interactions in Biological Functions [PDF]

BioMed Research International, 2015
Epidemiological studies and randomized controlled trials (RCTs) have shown that nutrition and nutritional habits may play a critical role in the optimal functioning of biological systems from conception to old age [1]. Epidemiological studies, due to their methodology, can only provide correlations between consumption of nutrient(s) and biological ...
Mohajeri, M. Hasan, Eckert, Gunter P., Pauly, James R., Butt, Christopher   +3 more
openaire   +5 more sources

Geographic variation in walking activity in the red flour beetle Tribolium castaneum

Population Ecology, EarlyView.
This study examined whether there is geographic variation in field populations, focusing on the moving activity in the red flour beetle Tribolium castaneum. Results showed significant differences in moving activity among field populations but no correlation with latitude or meteorological factors.
Kentarou Matsumura
wiley   +1 more source

Decoding the dual role of autophagy in cancer through transcriptional and epigenetic regulation

FEBS Letters, EarlyView.
Transcriptional and epigenetic regulation controls autophagy, which exerts context‐dependent effects on cancer: Autophagy suppresses tumorigenesis by maintaining cellular homeostasis or promotes tumor progression by supporting survival under stress. In this “In a Nutshell” article, we explore the intricate mechanisms of the dual function of autophagy ...
Young Suk Yu, Ik Soo Kim, Sung Hee Baek
wiley   +1 more source