Apex domains cannot have CNAME records.
Question and response
Question
dig agrico.com.ua. NS
Answer
agrico.com.ua. 5 NS nsb4.srv53.org.
agrico.com.ua. 5 NS nsc4.srv53.org.
agrico.com.ua. 5 NS nsd3.srv53.org.
agrico.com.ua. 5 NS nsa2.srv53.net.
agrico.com.ua. 5 NS nsd2.srv53.com.
agrico.com.ua. 5 NS nsb3.srv53.com.
agrico.com.ua. 5 NS nsa2.srv53.org.
agrico.com.ua. 5 NS nsc3.srv53.com.
agrico.com.ua. 5 NS nsa1.srv53.com.
agrico.com.ua. 5 NS nsc3.srv53.net.
agrico.com.ua. 5 NS nsb1.srv53.net.
agrico.com.ua. 5 NS nsd3.srv53.net.
Authority
The response has no authority records.
Additional
nsa1.srv53.com. 5 A 178.32.247.7
nsb1.srv53.net. 5 A 135.181.9.148
nsd3.srv53.org. 5 A 89.184.64.96
nsa1.srv53.com. 5 AAAA 2001:41d0:203:dee4:178:32:247:7
nsb1.srv53.net. 5 AAAA 2a01:4f9:4a:530c:181:9:148:2
nsd3.srv53.org. 5 AAAA 2a02:2278:70eb:298:89:184:64:96
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0