ASSESSMENT OF SOIL AND WATER FOR THE IRRIGATION OF AGRICULTURAL LAND OF THE CITY OF YAKUTSK

Abstract

Taiga – alas ecosystems are characterized by low bioproductivity, low intensity of physical, chemical and microbiological processes. The assessment of soil conditions is made for the further effective use of organic and mineral fertilizers and the prevention of environmentally hazardous concentrations of irrigation water. The humus content in the soil was 1.9 %, which is a very low figure. The provision of soil with mobile forms of phosphorus is high, the content of ammonia nitrogen in the soil is very low. Analysis of the water extract of the soil showed that the soil is saline. The water is mineralized within the normal range and is suitable for watering. The soil of the site is fertile, suitable for growing potatoes and vegetable crops. The following measures are recommended to improve soil fertility: the introduction of rotted manure to increase humus in the soil, the introduction of gypsum to reduce soil salinity.