Rajasthan Agricultural University has made 50 recommendations for development of wasteland areas, better crop management and improvement of agricultural production. The suggestions followed a broad-based research for farmers at the university's Bichchwal Research Centre continuing since 1996. University Regional Research Director Abhay Singh Rathore said here on Monday that experiments on sprinklers and drip irrigation taken up at the centre had proved very successful with the farm's income registering an increase of Rs.18 lakh during the last six years.