An assessment of the nitrogen fertilization efficiency should not only include quantitativeand qualitative yield changes, but also an analysis of formation some indicators such as: Nharvest index (NHI), N use efficiency (NUE), N utilization efficiency (NUtE), N agronomicefficiency (NAE), N physiological efficiency (NPE) and N apparent recovery fraction (NRF).The objective of the study was the e...

Nitrogen fertilization is critical to optimize short-term crop yield, but its long-term effect on soil organic C (SOC) is uncertain. Here, we clarify the impact of N fertilization on SOC in typical maize-based (Zea mays L.) Midwest U.S. cropping systems by accounting for site-to-site variability in maize yield response to N fertilization. Within continuous maize and maize-soybean [Glycine max (...

In order to explore a fertilization scheme that can adapt different soil fertility conditions and wheat varieties, two kinds of controlled-release ureas with release periods (60 days (CRU-60 d) 90 (CRU-90 d)) blending ordinary urea were applied in proportions at three sites evaluate the impacts bulk fertilizer (CRBBF) on NO3–N, NH4+-N contents dynamic change tillers, SPAD value, grain yield com...

introduction: to evaluate and compare efficiency of sil-select with percoll to recover sperm with normal chromatin in morphology and also studyeffect of these parameters on fertilization, embryo quality and cleavagescore. materials and methods: assessment of semen parameters, protamine deficiency (cma3) and excessive histone (aniline blue staining) were carried out before and after sperm proces...

The study focuses on how socio-economic and demographic indicators affect fertilization sustainability (excessive amount of fertilization). Principally we aim to examine the significance magnitude of the effects of three socio-demographic variables such as traditional way of fertilization, rental land farming, and farmers’ younger age on over-fertilization in Bangladesh and other developing cou...

Nitrogen (N) fertilization potentially affects soil N mineralization and leaching, and can enhance NH3 volatilization, thus impacting crop production. A fertilizer experiment with five levels of N addition (0, 79, 147, 215 and 375 kg N ha(-1)) was performed in 2009 and 2010 in a maize field in Huanghuaihai region, China, where > 300 kg N ha(-1) has been routinely applied to soil during maize gr...

Abstract Background Sustainable agriculture seeks to optimize the application of nitrogen (N) fertilizers reduce adverse economic and ecological effects. Crop diversification has been proposed increase efficiency N fertilization. An open question is how soil microbiome responds these beneficial practices. Methods In a field study we investigated effects mineral fertilizer with 0-control, conven...

introduction: the aim of this study was to evaluate the effect of sperm chromatin anomalies on fertilization outcome post icsi. material and methods: therefore along with semen parameters, cma3 staining for protamine deficiency, aniline blue staining for excessive histones, sds for sperm chromatin stability and sds+edta for ability of sperm to undergo decondensation were carried out on 55 semen...

Optimized fertilization practices are a promising management strategy for sustainable rice production. Green manuring, straw incorporation, postponing nitrogen (N) application, formula fertilization, combined application of organic and inorganic fertilizers, reducing deep slow/controlled-release fertilizers (S/CRFs), biochar addition nine frequently used optimized in China. The use efficiency (...