ORGANIC NITROGEN PHOSPHORUS AND SULFUR IN SOILS

ổng số tích lũy biến động lớn, phụ thuộc vào biện pháp quản lý ao. Ở các ao có khả năng bơm thoát bùn đáy, quá trình bơm thóat nhiều lần trong suốt thời gian nuôi dẫn đến sự tích lũy chất hữu cơ và hàm lượng N, P thấp. Tạp chí Khoa học 2012:22a 17-24 Trường Đại học Cần Thơ 24 TÀI LIỆU THAM KHẢO Bo[r]

The mỉine originates ftom hydrothermal metasomatosed type. The counfry rocks include dolomite marble, mica schist of the Thach Khoan formation, among which the marble contains ore minerals. There are approximafely 40. ore bodies making parallel array and c[r]

The field experiment was conducted during Kharif 2017 at Post Graduate Research Farm, College of Agriculture Kolhapur with the view to study the effect of integrated phosphorus management for yield, nutrient uptake of soybean grown on “P” deficient soil. The soil of experimental site was slightly al[r]

decreases exchangeable and organic Cu fractions, causing a shifting of part into the carbon-ate and residual fractions. However, because the amount of exchangeable and organic frac-tions redistributed was not high, they didn’t significantly increase the other fracti[r]

form extremely fine, flat particles. Theseparticles are layered something like a messydeck of cards. The spaces between clay par-ticles are extremely small, which is why waterand air move between them so slowly.The diameter of the finest sand is more thana thousand times larger than the diameter of[r]

role of ammonium concentration: in particular, the organic and nitrogen removal tend to decrease whenammonium concentration increase. For this reason, a specific ammonium pre-treatment must be appliedbefore aerobic granular sludge application. Furthermore, the initial cul[r]

Gladiolus occupies an important place among the most popular bulbous ornamental plants. To optimize the production technology for this important plant, a field experiment was conducted at the Horticulture Experimental Farm, School of Agricultural sciences and Rural Development, Nagaland University,[r]

waste water discharge meets the standard. The concentrations of heavy metals in waste water of the factories meet the standard. Calculations of pollutants loads in waste water from some factories by IPC software show that, if not treated, the annual pollutants loads of HABECO are about[r]

This method was self-sufficient and self-dependent as it is relying more on organic inputs. With this background this project is to be taken up to find out the effect of different organic amendments on production and productivity of different crops under salt affected soils.

form extremely fine, flat particles. Theseparticles are layered something like a messydeck of cards. The spaces between clay par-ticles are extremely small, which is why waterand air move between them so slowly.The diameter of the finest sand is more thana thousand times larger than the diameter of[r]

A field experiment was conducted to investigate the methods of cultivation and optimization of nitrogen requirement of rice crop in coastal alluvial soils, Karaikal, Pondicherry, India. Experiment was laid out in a split plot design with methods of rice cultivation as main plot treatment consisted o[r]

Atrazine Benzene Dinitrobenzenes (1,2- ; 1,3- and 1,4-Dinitrobenzene) Dinitrotoluoles (2,4- ; 2,5- and 2,6-Dinitrotoluol) Isobenzan Simazine Trifluralin 8. Persistent mineral oils and hydrocarbons of petroleum origin 9. Cyanides 10. Radioactive material and wastes Recomme[r]

III.2. Survey on the use of liquid waste in An Giang province Results from the survey showed that rice yields in fields using wastewater from fishponds for irrigation had higher yield than paddies without recycling of wastewater. Yield difference between the two methods was about 1 t/[r]

pellant, forcing the chemical industry to develop al-ternatives. By 1987 the depletion of the ozone layerhad become so problematic that most industrial na-tions met in Montreal to ratify an international treatycalling for immediate reductions in all CFC use with acomplete phase-out by[r]

inputs of about 10 kg N/ha per year, there was very little N leaching at anyof the study sites. At throughfall inputs greater than 25 kg N/ha per year,the study catchments consistently leached high concentrations of inorganicN. At intermediate deposition values (10 to 25 kg N/ha per year), Dise andW[r]

Soil samples collected from two termite mound soils in Anna University campus, Chennai, Tamil Nadu were characterized for the various parameters such as pH, Electrical Conductivity (EC), Total organic carbon (TOC), Nitrogen (N), Phosphorus(P) and Potassium (K)and microbial activity. The dehydrogenas[r]

A study was carried out to assess the available nutrient status in soils of Kumbhi block under Lakhimpur (Kheri) district (U.P.). In that context 60 soil samples were collected from the different locations of Kumbhi block. Collected soil samples taken for laboratory analysis and analyzed the physico[r]

In this present studied poly bag experiment was conducted following complete randomized block design with 12 treatments and three replications. Polluted Soil with supply of fresh water, Unpolluted soil with supply of fresh water, Unpolluted soil with supply of polluted water. The results of pot cult[r]

A field experiment was conducted during Kharif season 2015. The results of the study indicated the application of phosphorus up to 40 kg P2O5 ha-1 recorded significantly higher number of pods per plant, number of seeds per pod and seed and straw yield, nitrogen, phosphorus and potassium uptake in se[r]

A field experiment was conducted during rabi, 2018-19 to study the effect of foliar nutrition on growth and yield of sweet corn on sandy loam soils of Agricultural College Farm, Naira with a pH of 7.3 and EC of 0.072 dSm-1 , low in organic carbon (0.42%) and available nitrogen (263.2 kg ha-1 ), medi[r]