Results 1 to 10 of about 138,421 (105)

Dissimilar response of plant and soil biota communities to long-term nutrient adition in grasslands [PDF]

open access: yes, 2009
The long-term effect of fertilizers on plant diversity and productivity is well known, but long-term effects on soil biota communities have received relatively little attention.
Geerts, R.H.E.M.   +6 more
core   +2 more sources

Statistics of Merging Peaks of Random Gaussian Fluctuations: Skeleton Tree Formalism [PDF]

open access: yes, 1999
In order to study the statistics of the objects with hierarchical merging, we propose the skeleton tree formalism, which can analytically distinguish the episodic merging and the continuous accretion in the mass growth processes.
Hanami, Hitoshi
core   +3 more sources

Spring barley yield and nitrogen recovery after application of peat manure and pig slurry [PDF]

open access: yes, 2006
The effectiveness of peat manure, manufactured of pig slurry and moderately humified Sphagnum peat (slurry:peat ca. 1:1.5 v/v), as nitrogen (N) source for spring barley was investigated in a four.year field experiment on a clay loam soil in south-western
Mattila, Pasi K.
core   +2 more sources

Износ на хранителни елементи с биологичния добив от картофи (Solanum tuberosum L.)

open access: yesПочвознание, агрохимия и екология, 2021
В условия на зеленчуково сеитбообращение е заложен опит с картофи - средно-ранно производство, след предшественик фасул. Почвата е Алувиално-ливадна (Alluvial-Meadow soil (Fluvisol)), с ниско остатъчното съдържание на минерален азот, ниско до ...
Иванка Митова
doaj  

The Effects of the Peak-Peak Correlation on the Peak Model of Hierarchical Clustering [PDF]

open access: yes, 1997
In two previous papers a semi-analytical model was presented for the hierarchical clustering of halos via gravitational instability from peaks in a random Gaussian field of density fluctuations.
Alberto Manrique   +9 more
core   +3 more sources

Science-based decision support for formulating crop fertilizer recommendations in sub-Saharan Africa [PDF]

open access: yes, 2020
Open Access Article; Published online: 31 Jan 2020In sub-Saharan Africa, there is considerable spatial and temporal variability in relations between nutrient application and crop yield, due to varying inherent soil nutrients supply, soil moisture, crop ...
Andersson, Jens A.   +11 more
core   +1 more source

Изследване на ефекта на органичните торове върху добива зърно на обикновена пшеница (Triticum aestivum L.)

open access: yesРастениевъдни науки, 2021
Обстановка и цел: Приложението на органични торове във вид на пелети у нас е все още почти непознато. Изследванията в тази насока и в световната практика са малко на брой. Не е ясно какви са ефектите им върху добива и качеството на продукцията.
Николай Ценов   +2 more
doaj  

A High Resolution Study of the Slowly Contracting, Starless Core L1544 [PDF]

open access: yes, 1999
We present interferometric observations of N2H+(1--0) in the starless, dense core L1544 in Taurus. Red-shifted self-absorption, indicative of inward motions, is found toward the center of an elongated core.
Andre P.   +7 more
core   +2 more sources

Decomposition of coarse woody debris in a long-term litter manipulation experiment: A focus on nutrient availability [PDF]

open access: yes, 2018
The majority of above-ground carbon in tropical forests is stored in wood, which is returned to the atmosphere during decomposition of coarse woody debris.
Gora, Evan M.   +3 more
core   +3 more sources

Backgrounds of mineral nutrition of alfalfa agrocenosis and productivity of subsequent crop of field crop rotation - spring wheat variety ‘Eskada 70’on grey forestry soils of the Republic of Tatarstan

open access: yesЗерновое хозяйство России, 2018
The paper considers the correlation of backgrounds of nutrition and a layer of alfalfa agrocenosis on the sowings of spring wheat variety ‘Eskada 70’ as a subsequent crop of field crop rotation.
F. N. Safiollin   +3 more
doaj   +2 more sources

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