abstract in this study, p critical level for corn plant (zea mays l.) was determined using pbc in 25 combined soils samples from different fields of east azerbaijan province. to calculate the pbc, current soil p test methods such olsen,colwel, soltanpur and schowab, kelna2 and iron impregnated strips as a quantity factor (q) and the methods of soluble p measurements such as distilled water, cal...

Forest fires can greatly affect soil properties and processes. In the study of fire effects on soil, thickness affected by heat depends characteristics itself, but also attribute to be measured. The objective this work is know what (up 1, 2 or 3 cm) various sensitive are immediately a controlled burning. To achieve aim, unaltered fresh topsoil (mollic horizon) fire-prone Aleppo pine forest in s...

Background Rising atmospheric CO2 concentrations can increase crop yields; however, it is poorly understood if plants require higher phosphorus (P) inputs to support increased production. In addition, soils with contrasting P-sorption capacities may alter plant response elevated CO2. Aims We examined the effect of on critical soil available P and shoot for growth in capacities. Methods Response...

Nitrogen (N) and phosphorus (P) are primary indicators of soil nutrients in agriculture. Accurate management these is essential for ensuring food security. High-resolution, multi-spectral remote sensing images can provide crucial information mapping at the field scale. This study compares capabilities ZH-1 Sentinel-2 satellite data, along with different spectral indices, (total N Olsen-P) using...