The occurrence of nickel (Ni) deficiency of pecan [Carya illinoinensis (Wangenh.) K. Koch] in orchards is an increasingly common problem. There is uncertainly regarding the primary cause of the problem, as orchard soils have plenty of Ni. The influence of essential micronutrients on the endogenous bioavailability of Ni is unknown and is a possible factor triggering Ni deficiency. This study exa...

The article presents the materials of studies foliar top dressing with organomineral fertilizers on productivity and quality grain agricultural crops in conditions dark chestnut soils Saratov Left Bank. It is shown that application an organic microelement complex (OMEC) contributes to increase yield compared control at level 0.28 t/ha (winter wheat), 0.07 (chickpeas sunflower) 0.23 (corn). An a...

Calcium is the third most crucial nutrient for andean blackberry; however, its absorption limited in acid soils, and low mobility plant decreases effects on fruits. Therefore, effect of foliar fertilizers with calcium blackberry fruits was estimated. In three locations, experiments were established five sources (Ca chelate, CaB nitrate, Ca oxide, CaBZn gluconate) a control without calcium, appl...