To ensure food supply, phosphorus must be recycled, for which an appealing method is using struvite fertilizer from human excreta. One struvite from black water and another from urine were assessed for safety under Dutch regulations, and for effectiveness as P fertilizer in a maize field experiment and a literature review. Both struvites contained 12% P, 12% Mg, 6% N, and 0.5-1.5% of several mi...

Agricultural systems often require added phosphorus to achieve optimum crop and livestock production. The application of soil amendments, such as inorganic fertilizers, manure, biosolids, and waste water, can improve soil fertility and help produce optimum crop yields. However, many of these amendments, particularly organic materials such as animal manure, are often applied in excess of crop nu...

Phosphorus is an essential element for life on earth and is also important for modern agriculture, which is dependent on inorganic fertilizers from phosphate rock. Polyphosphate is a biological polymer of phosphate residues, which is accumulated in organisms during the biological wastewater treatment process to enhance biological phosphorus removal. Here, we investigated the relationship betwee...

nitrogen and phosphorus are two of the essential nutrients that promote plants' growth and yield. deficiency of these nutrients in soil is usually compensated through application of chemical fertilizers. chemical fertilizers on the other hand have detrimental effects on environment in addition to decreasing quality of agricultural products. the present study was conducted to evaluate the e...

The purpose of the research was to evaluate changes in agrochemical properties sour cherry orchard soil after permanent fertilization with urea and potassium sulfate. field experiment conducted during 2017-2021 climatic conditions Central Russian Upland (Oryol region). ‘Turgenevka’ trees grafted on rootstock V-2-180 were planted 2015 at a distance 5x3 m. is loamy Haplic Luvisol following parame...

In order to study the effects of nitrogen (N), phosphorus (P) and potassium (K) on the yield, the appearance eligibility ratio and the contents of total glucosinolates and glucoraphanin of cauliflower, the 311-A optimization regression design was used to conduct field experiments of N, P, K fertilizer treatments using winter cauliflower variety ‘‘HB16’’. The models of the balanced application f...

A pot experiment was conducted to determine the effect of compost and bio-fertilizers on the growth, yield and oil constituents of marjoram (Majorana hortensis L.). Forty five days old seedling were transplanted in soil treated with 15 and 30% aqueous extracts of compost and/or biofertilizers (mixture of Azospirillum brasilienses, Azotobacter chroococcum, Bacillus polymyxa & B. circulans) in ad...