نتایج جستجو برای: tea waste and loam soil 50

تعداد نتایج: 16945002  

Journal: :iran agricultural research 2012
b. ghahraman s. omidi a. khoshnood yazdi

measurement of soil saturated hydraulic conductivity, ks, is normally affected by flow patterns such as macro pore; however, most current techniques do  not differentiate flow types, causing major problems in describing water and chemical flows within the soil matrix. this study compares eight models for scaling ks and predicted matrix and macro pore ks, using a database composed of 50 datasets...

Journal: :Journal of nematology 1976
G S Santo B Lear

Pratylenchus vulnus is involved in a desease of Rosa noisettiana 'Manetti' rose rootstock characterized by darkening of roots, death of feeder roots, and stunting of entire plants. The disease is more severe when plants are grown in silt loam soil than when they are grown in sandy loam soil. The nematodes reproduce best in silt loam soil at 20 C. Meloidogyne hapla did not affect the growh of Ma...

2013
Jocelyn Onley Jocelyn Olney David Wedin Sabrina Russo

Lambir Hills National Park in Malaysian Borneo is composed of dipterocarp tree species which specialize on different soil types. Although the mechanisms contributing to this distribution of tree species are unknown, one hypothesis is that tree species at Lambir differ in their preferences for different nitrogen forms. In this study we investigated (1) whether clay soil and sandy loam soil types...

Journal: :Agronomy 2021

Understanding carbon mineralization dynamics of organic amendments is essential to restore degraded lands. This study focused on the restoration potentials tea-growing soils using materials available in tea ecosystems. The Selangor-Briah soil series association (Typic Endoaquepts) consisted a high- (soil A) and low-carbon B) were incubated with different released dioxide (CO2) measured. Two kin...

Journal: :Agronomy 2021

The increasing quantities of organic residues are becoming one the most important problems for climate change mitigation. Sustainable utilization technologies required to minimize effect recycling on environment. Nevertheless, treated should be part circular bioeconomy. One promising processes is biogas system, with final products and digestate, which contain valuable nutrients therefore suitab...

This study was performed under greenhouse condition and completely randomized design for wheat and canola at near saturated soil moisture condition to field capacity (seven soil matric suction treatments including 20, 40, 60, 80, 110, 300 and 500 cm with three ) in two consecutive years. The results showed that as the soil moisture content decreases from saturation condition, root respiration r...

Journal: :Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes 2008
Xiuzhen Hao Dongmei Zhou Lei Sun Lianzhen Li Hailin Zhang

When manures from intensive livestock operations are applied to agricultural or vegetable fields at a high rate, large amounts of salts and metals will be introduced into soils. Using a column leaching experiment, this study assessed the leaching potential of the downward movement of Cu and Zn as well as some salt ions after an intensive farm pig manure at rates of 0%, 5% and 10% (w/w) were app...

Journal: :Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering 2014
Roger Saint-Fort Sahar Ashtani

This investigation was undertaken to determine the relative effects of recommended land spraying while drilling (LWD) loading rate application for a source of water-based drilling waste material on selected soil properties and phytotoxicity. Drilling waste material was obtained from a well where a nitrate gypsum water based product was used to formulate the drilling fluid. The fluid and associa...

Journal: :Journal of environmental quality 2008
Marek K Jarecki Timothy B Parkin Alvarus S K Chan Jerry L Hatfield Raymond Jones

The interactive effects of soil texture and type of N fertility (i.e., manure vs. commercial N fertilizer) on N(2)O and CH(4) emissions have not been well established. This study was conducted to assess the impact of soil type and N fertility on greenhouse gas fluxes (N(2)O, CH(4), and CO(2)) from the soil surface. The soils used were a sandy loam (789 g kg(-1) sand and 138 g kg(-1) clay) and a...

2014
Baoyi Ji Hao Hu Yali Zhao Xinyuan Mu Kui Liu Chaohai Li

Two field experiments were conducted for two years with the aim of studying the effects of deep tillage and straw returning on soil microorganism and enzyme activity in clay and loam soil. Three treatments, (1) conventional tillage (CT), shallow tillage and straw returning; (2) deep tillage (DT), deep tillage and straw returning; and (3) deep tillage with no straw returning (DNT), were carried ...

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