Jaroslav Křička wrote two symphonies:
1. Symphony in D minor ("Jarní") (1905), "Spring Symphony"
2nd symphony in a minor ("Letní") (1907), "Summer Symphony"
Does anyone know if they have been recorded or broadcast?
Not recorded - at least, not according to the symphony surveys at MusicWeb:
http://www.musicweb-international.com/Ntl_discogs/Balkan_symphonies/ECE_Balkan_Symphonies.htm
He was prolific:
https://en.wikipedia.org/wiki/Jaroslav_K%C5%99i%C4%8Dka
Here's his 1911 Bluebird Overture, Op.16:
https://www.youtube.com/watch?v=1OF4XPJ7mdY
Two Wallachian Dances (https://archive.org/details/cd_moor-figus-bystry-cikker-holoubek-burian-k_karel-moor-vilem-figus-bystry-jan-cikker-l/disc1/06.+Jaroslav+Kricka+-+2+Wallachian+Dances+for+Orch..flac)
As far as Křička's Symphonies are concerned, the Czech Radio Prague broadcast archives show that there were only 2 instances in 1975 in which his Symfonietta for strings and timpani, a later composition - not the 2 early symphonies being referred to - were aired on their classical FM station.
https://apf.croapp.cz/?query=&naz=&aut=%60K%C5%99i%C4%8Dka%60&int=&dat_od=1900&dat_do=2021&poc_na_str=500
Hudební snímky
Název: Symfonietta pro smyčcový orchestr a tympány op. 77
Autor: Jaroslav Křička
Hrají: Symfonický orchestr hlavního města Prahy FOK
Řídí: Aleš Křička
Vyrobeno v: ČSRo Praha
https://apf.croapp.cz/?detail_id=8951318
https://apf.croapp.cz/?detail_id=632555
Hope this helps. It is therefore a worthy endeavour for Supraphon (highly unlikely though as it is not commercially viable according to their usual recording practices aside from releasing Czech Radio's archived material of Křička orchestral, vocal and chamber compositions under the latter's licensing approval) and more promisingly Naxos (under its present collaboration with Arco-Diva label to comprehensively explore & record the V. Novak and JB Foerster orchestral repertory which hopefully will commence its rollout in 2022) to take up this cause in performing and recording the Křička Symphonies under the advocacy of Arco-Diva CEO Jiri Stilec & and his son the up and coming Maestro Marek Stilec.
Meanwhile, here's sending my best wishes for the year-end holiday season to one and all, JP ;)
How annoying! Having downloaded a recent CD from the Cesky rohlas label purportedly containing 2 symphonies by Jaroslav Krcka ( Kricka) , one of my favourite Czech composers, I discovered that the tuneless cacophony was in fact composed by Jaroslav Krcek, a modern composer of electronic music! Crickey!