[Effect of reclamation and long - term utilization onto the agrochemical properties of sod - gley sandy loam soil]
2008
Tivo, P.F. | Saskevich, L.A. | Spartak, V.E., National Academy of Sciences. Scientific and Practical Center for Arable Farming (Belarus). Institute for Land Reclamation
Agrochemical features of grained sod - gley soil depending on the longevity of agricultural utilization are studied. Positive effect of reclamation onto the content of mobile forms of P2O5 and K2O in connection with annual fertilizers application within 24 years has increased on an arable land accordingly in 3,4; 5,8 times in comparison with initial level of phosphorus - 95 mg, potassium - 56 mg/kg of soil though their total reserves have not been practically changed. In comparison with undrained areas intensification of the process of nitrification, that is especially expressed during the years with elevated atmospheric precipitation per vegetation period is observed. As to the humus content in arable layer it depended, first of all, on character of agricultural use of such soils like these ones. On the contrary, the calcium content on drained arable soil tended to decrease that has caused some reduction of рН size though reaction of environment remained practically neutral. It is not revealed special distinctions by variants of experience and under the content of heavy metals (lead and cadmium). In all cases it was in admissible limits though for this time it has been brought only operating substance of phosphoric fertilizers over 1,4 t/ha containing such compounds as impurities. On undrained area this increase is expressed a little less because of retrogradation of similar connections. It gives the chance to estimate conditions of plants nutrition by mentioned microelement more objectively
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