within-field variation of wheat yield and spatial pattern of weed density and soil nitrogen were evaluated by geostatistical methods. samples were taken from a 90×120 m area located in a 3.8 ha wheat field. soil nitrogen content and weed density at tillering and wheat yield at maturity were measured in 1 m2 plots located at the center of 10×10 m grids. grain yield was varied between 1.5-4.9 t h...

Abstract The study was based on the distribution of soil carbon and nitrogen orders in a dryland farming system Aceh Besar District, Indonesia. Soil samples were taken to represent 6 (six) drylands Besar, namely: Andisols, Entisols, Inceptisols, Mollisols, Oxisols, Ultisols. For each order, 5 observation profiles made, profile sampled at 7 (seven) depths from 0-100 cm, 0-0.05 m; 0.05-0.10 0.10-...

This study aimed to identify the most important physical variables affecting the distribution of four range plants species (Tamarix aphylla, Calligonum comosum, Prosopis spicigera and Salsola rigida) habitats and to prepare potential habitat map of the species using Maximum Entropy (MaxEnt) method in rangelands of Jiroft city, Kerman province, located in SE Iran. To this end, sampling of vegeta...

Neonicotinoid insecticides have come under scrutiny for their potential unintended effects on non-target organisms, particularly pollinators in agro-ecosystems. As part of a larger study of neonicotinoid residues associated with maize (corn) production, 76 water samples within or around the perimeter of 18 commercial maize fields and neighbouring apiaries were collected in 5 maize-producing cou...

An experiment was conducted on “Influence of Organic Manure and Inorganic Fertilizer Soil Health, Growth Yield Cowpea (Vigna unguiculata L.) var. Gomati.” during kharif season 2022-23 at the research farm Department soil science agricultural chemistry, NAINI, SHUATS, Prayagraj. The design applied RBD having three levels poultry-manure @ 0%,50 % 100% h-1 NPK 0, 50and 100%. variety cowpea Gomati ...

in order to investigate some silvicultural and soil physico-chemical characteristics of christ's thorn (ziziphus spina christi l. desf.) natural stands, ten natural stands of the tree species which have similar climate and aspects were selected and altitude from sea level (asl), the thickest sprout collar diameter (tscd) and total tree height (th) of the tree species were measured in 1000 ...

background: soil structure is mainly composed of sand, silt, clay, and organic materials. organisms can live in the soil. the large number of stray cats in the cities of iran is a major environmental and health problem. toxoplasma oocysts are shed with the feces of cats, so soil is known as a potential source of transmission of toxoplasmosis. the aim of this study was to determine the soil cont...