Results 31 to 40 of about 790,618 (198)

The influence of training status, age, and muscle fiber type on cycling efficiency and endurance performance. [PDF]

open access: yes, 2013
The purpose of this study was to assess the influence of age, training status, and muscle fiber-type distribution on cycling efficiency. Forty men were recruited into one of four groups: young and old trained cyclists, and young and old untrained ...
Wiles, J.   +15 more
core   +1 more source

Production, nutrient cycling and soil compaction to grazing of grass companion cropping with corn and soybean

open access: yes, 2017
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Processo FAPESP: 2010/12992-0Processo FAPESP: 2011/12155-3Agricultural management systems are needed to simultaneously ...
Andreotti, Marcelo   +22 more
core   +1 more source

An investigation of the duration of phosphorous fertilization effects on phosphorous and nitrogen cycling patterns of Pinus elliottii plantations in the southern Cape [PDF]

open access: yes, 1992
Includes bibliographical references.The effects of phosphorus fertilization and its duration of impact on nutrient cycling patterns in Pinus elliottii plantations were investigated by examining soil phosphorus and nitrogen turnover and litterfall in a 8,
Wienand, Karen Tania
core   +1 more source

Effects of Different Nutrient Management Regimes on Rice Yield and Nitrogen Uptake and Use Efficiency

open access: yesPlants
(1) Background: We investigated the effects of nutrient levels on rice yield and nitrogen uptake, with the aim of improving rice yield and nitrogen use efficiency.
Quanshi Feng   +11 more
doaj   +1 more source

Mechanical Side-Deep Fertilization Synergizes with Controlled-Release Fertilizer to Drive Low-Carbon and High-Efficiency Rice (Oryza sativa L.) Production

open access: yesAgriculture
Against the backdrop of escalating global climate challenges, minimizing carbon emissions while enhancing energy efficiency in rice production has emerged as a core pathway toward achieving agricultural carbon neutrality. A two-year field study conducted
Manman Yuan   +8 more
doaj   +1 more source

Organic Amendment Source Affects Soil Aggregation, Carbon–Nitrogen Allocation, and Wheat Yield in a Long-Term Rice–Wheat Rotation System

open access: yesAgronomy
Long-term reliance on mineral fertilizers may degrade soil structure and weaken carbon and nitrogen retention in rice–wheat rotation systems. Organic amendments combined with mineral fertilizers can provide organic substrates, promote aggregate formation,
Yao Lu   +9 more
doaj   +1 more source

Long-term straw incorporation benefits the elevation of soil phosphorus availability and use efficiency in the agroecosystem

open access: yesSpanish Journal of Agricultural Research, 2018
Soil pH and organic matter are important factors influencing phosphorus (P) fertilizer use efficiency. Long-term crop straw incorporation alters soil pH and soil organic matter.
Zhibin Guo   +4 more
doaj   +1 more source

Knowledge of and attitudes towards concussion in cycling: A preliminary study [PDF]

open access: yes, 2019
The aim of this study was to investigate the knowledge of and attitudes towards concussion in cycling. An abbreviated Rosenbaum Concussion Knowledge and attitudes Survey (RoCKAS) was distributed online via social media and completed by 1990 respondents ...
Atkins, SJ   +11 more
core   +1 more source

Multi-Source Remote Sensing Collaboration Reveals Spatiotemporal Differentiation and Driving Mechanisms of Soil Organic Matter in Cultivated Land of Anhui Province

open access: yesAgriculture
The spatial heterogeneity and dynamic changes in soil organic matter (SOM) are key indicators for assessing cultivated land quality and the carbon cycle.
Mengmeng Tang   +10 more
doaj   +1 more source

Evaluation of the Effectiveness of a Nutrient Inhibitor Applied to High Cadmium-Risk Double-Cropped Rice Fields

open access: yesGuangdong nongye kexue, 2023
【Objective】The study aimed to address the conspicuous problem of excessive cadmium (Cd) in rice by developing and applying a nutrient inhibitor in the field to evaluate its effectiveness in reducing Cd uptake by rice and improving soil nutrients.【Method ...
Yanhong WANG   +8 more
doaj   +1 more source

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